linux-2.6-microblaze.git
2 years agobtrfs: do not start relocation until in progress drops are done
Josef Bacik [Fri, 18 Feb 2022 19:56:10 +0000 (14:56 -0500)]
btrfs: do not start relocation until in progress drops are done

We hit a bug with a recovering relocation on mount for one of our file
systems in production.  I reproduced this locally by injecting errors
into snapshot delete with balance running at the same time.  This
presented as an error while looking up an extent item

  WARNING: CPU: 5 PID: 1501 at fs/btrfs/extent-tree.c:866 lookup_inline_extent_backref+0x647/0x680
  CPU: 5 PID: 1501 Comm: btrfs-balance Not tainted 5.16.0-rc8+ #8
  RIP: 0010:lookup_inline_extent_backref+0x647/0x680
  RSP: 0018:ffffae0a023ab960 EFLAGS: 00010202
  RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
  RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000000
  RBP: ffff943fd2a39b60 R08: 0000000000000000 R09: 0000000000000001
  R10: 0001434088152de0 R11: 0000000000000000 R12: 0000000001d05000
  R13: ffff943fd2a39b60 R14: ffff943fdb96f2a0 R15: ffff9442fc923000
  FS:  0000000000000000(0000) GS:ffff944e9eb40000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00007f1157b1fca8 CR3: 000000010f092000 CR4: 0000000000350ee0
  Call Trace:
   <TASK>
   insert_inline_extent_backref+0x46/0xd0
   __btrfs_inc_extent_ref.isra.0+0x5f/0x200
   ? btrfs_merge_delayed_refs+0x164/0x190
   __btrfs_run_delayed_refs+0x561/0xfa0
   ? btrfs_search_slot+0x7b4/0xb30
   ? btrfs_update_root+0x1a9/0x2c0
   btrfs_run_delayed_refs+0x73/0x1f0
   ? btrfs_update_root+0x1a9/0x2c0
   btrfs_commit_transaction+0x50/0xa50
   ? btrfs_update_reloc_root+0x122/0x220
   prepare_to_merge+0x29f/0x320
   relocate_block_group+0x2b8/0x550
   btrfs_relocate_block_group+0x1a6/0x350
   btrfs_relocate_chunk+0x27/0xe0
   btrfs_balance+0x777/0xe60
   balance_kthread+0x35/0x50
   ? btrfs_balance+0xe60/0xe60
   kthread+0x16b/0x190
   ? set_kthread_struct+0x40/0x40
   ret_from_fork+0x22/0x30
   </TASK>

Normally snapshot deletion and relocation are excluded from running at
the same time by the fs_info->cleaner_mutex.  However if we had a
pending balance waiting to get the ->cleaner_mutex, and a snapshot
deletion was running, and then the box crashed, we would come up in a
state where we have a half deleted snapshot.

Again, in the normal case the snapshot deletion needs to complete before
relocation can start, but in this case relocation could very well start
before the snapshot deletion completes, as we simply add the root to the
dead roots list and wait for the next time the cleaner runs to clean up
the snapshot.

Fix this by setting a bit on the fs_info if we have any DEAD_ROOT's that
had a pending drop_progress key.  If they do then we know we were in the
middle of the drop operation and set a flag on the fs_info.  Then
balance can wait until this flag is cleared to start up again.

If there are DEAD_ROOT's that don't have a drop_progress set then we're
safe to start balance right away as we'll be properly protected by the
cleaner_mutex.

CC: stable@vger.kernel.org # 5.10+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2 years agobtrfs: tree-checker: use u64 for item data end to avoid overflow
Su Yue [Tue, 22 Feb 2022 08:42:07 +0000 (16:42 +0800)]
btrfs: tree-checker: use u64 for item data end to avoid overflow

User reported there is an array-index-out-of-bounds access while
mounting the crafted image:

  [350.411942 ] loop0: detected capacity change from 0 to 262144
  [350.427058 ] BTRFS: device fsid a62e00e8-e94e-4200-8217-12444de93c2e devid 1 transid 8 /dev/loop0 scanned by systemd-udevd (1044)
  [350.428564 ] BTRFS info (device loop0): disk space caching is enabled
  [350.428568 ] BTRFS info (device loop0): has skinny extents
  [350.429589 ]
  [350.429619 ] UBSAN: array-index-out-of-bounds in fs/btrfs/struct-funcs.c:161:1
  [350.429636 ] index 1048096 is out of range for type 'page *[16]'
  [350.429650 ] CPU: 0 PID: 9 Comm: kworker/u8:1 Not tainted 5.16.0-rc4
  [350.429652 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014
  [350.429653 ] Workqueue: btrfs-endio-meta btrfs_work_helper [btrfs]
  [350.429772 ] Call Trace:
  [350.429774 ]  <TASK>
  [350.429776 ]  dump_stack_lvl+0x47/0x5c
  [350.429780 ]  ubsan_epilogue+0x5/0x50
  [350.429786 ]  __ubsan_handle_out_of_bounds+0x66/0x70
  [350.429791 ]  btrfs_get_16+0xfd/0x120 [btrfs]
  [350.429832 ]  check_leaf+0x754/0x1a40 [btrfs]
  [350.429874 ]  ? filemap_read+0x34a/0x390
  [350.429878 ]  ? load_balance+0x175/0xfc0
  [350.429881 ]  validate_extent_buffer+0x244/0x310 [btrfs]
  [350.429911 ]  btrfs_validate_metadata_buffer+0xf8/0x100 [btrfs]
  [350.429935 ]  end_bio_extent_readpage+0x3af/0x850 [btrfs]
  [350.429969 ]  ? newidle_balance+0x259/0x480
  [350.429972 ]  end_workqueue_fn+0x29/0x40 [btrfs]
  [350.429995 ]  btrfs_work_helper+0x71/0x330 [btrfs]
  [350.430030 ]  ? __schedule+0x2fb/0xa40
  [350.430033 ]  process_one_work+0x1f6/0x400
  [350.430035 ]  ? process_one_work+0x400/0x400
  [350.430036 ]  worker_thread+0x2d/0x3d0
  [350.430037 ]  ? process_one_work+0x400/0x400
  [350.430038 ]  kthread+0x165/0x190
  [350.430041 ]  ? set_kthread_struct+0x40/0x40
  [350.430043 ]  ret_from_fork+0x1f/0x30
  [350.430047 ]  </TASK>
  [350.430047 ]
  [350.430077 ] BTRFS warning (device loop0): bad eb member start: ptr 0xffe20f4e start 20975616 member offset 4293005178 size 2

btrfs check reports:
  corrupt leaf: root=3 block=20975616 physical=20975616 slot=1, unexpected
  item end, have 4294971193 expect 3897

The first slot item offset is 4293005033 and the size is 1966160.
In check_leaf, we use btrfs_item_end() to check item boundary versus
extent_buffer data size. However, return type of btrfs_item_end() is u32.
(u32)(4293005033 + 1966160) == 3897, overflow happens and the result 3897
equals to leaf data size reasonably.

Fix it by use u64 variable to store item data end in check_leaf() to
avoid u32 overflow.

This commit does solve the invalid memory access showed by the stack
trace.  However, its metadata profile is DUP and another copy of the
leaf is fine.  So the image can be mounted successfully. But when umount
is called, the ASSERT btrfs_mark_buffer_dirty() will be triggered
because the only node in extent tree has 0 item and invalid owner. It's
solved by another commit
"btrfs: check extent buffer owner against the owner rootid".

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215299
Reported-by: Wenqing Liu <wenqingliu0120@gmail.com>
CC: stable@vger.kernel.org # 4.19+
Signed-off-by: Su Yue <l@damenly.su>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2 years agobtrfs: do not WARN_ON() if we have PageError set
Josef Bacik [Fri, 18 Feb 2022 15:17:39 +0000 (10:17 -0500)]
btrfs: do not WARN_ON() if we have PageError set

Whenever we do any extent buffer operations we call
assert_eb_page_uptodate() to complain loudly if we're operating on an
non-uptodate page.  Our overnight tests caught this warning earlier this
week

  WARNING: CPU: 1 PID: 553508 at fs/btrfs/extent_io.c:6849 assert_eb_page_uptodate+0x3f/0x50
  CPU: 1 PID: 553508 Comm: kworker/u4:13 Tainted: G        W         5.17.0-rc3+ #564
  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
  Workqueue: btrfs-cache btrfs_work_helper
  RIP: 0010:assert_eb_page_uptodate+0x3f/0x50
  RSP: 0018:ffffa961440a7c68 EFLAGS: 00010246
  RAX: 0017ffffc0002112 RBX: ffffe6e74453f9c0 RCX: 0000000000001000
  RDX: ffffe6e74467c887 RSI: ffffe6e74453f9c0 RDI: ffff8d4c5efc2fc0
  RBP: 0000000000000d56 R08: ffff8d4d4a224000 R09: 0000000000000000
  R10: 00015817fa9d1ef0 R11: 000000000000000c R12: 00000000000007b1
  R13: ffff8d4c5efc2fc0 R14: 0000000001500000 R15: 0000000001cb1000
  FS:  0000000000000000(0000) GS:ffff8d4dbbd00000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00007ff31d3448d8 CR3: 0000000118be8004 CR4: 0000000000370ee0
  Call Trace:

   extent_buffer_test_bit+0x3f/0x70
   free_space_test_bit+0xa6/0xc0
   load_free_space_tree+0x1f6/0x470
   caching_thread+0x454/0x630
   ? rcu_read_lock_sched_held+0x12/0x60
   ? rcu_read_lock_sched_held+0x12/0x60
   ? rcu_read_lock_sched_held+0x12/0x60
   ? lock_release+0x1f0/0x2d0
   btrfs_work_helper+0xf2/0x3e0
   ? lock_release+0x1f0/0x2d0
   ? finish_task_switch.isra.0+0xf9/0x3a0
   process_one_work+0x26d/0x580
   ? process_one_work+0x580/0x580
   worker_thread+0x55/0x3b0
   ? process_one_work+0x580/0x580
   kthread+0xf0/0x120
   ? kthread_complete_and_exit+0x20/0x20
   ret_from_fork+0x1f/0x30

This was partially fixed by c2e39305299f01 ("btrfs: clear extent buffer
uptodate when we fail to write it"), however all that fix did was keep
us from finding extent buffers after a failed writeout.  It didn't keep
us from continuing to use a buffer that we already had found.

In this case we're searching the commit root to cache the block group,
so we can start committing the transaction and switch the commit root
and then start writing.  After the switch we can look up an extent
buffer that hasn't been written yet and start processing that block
group.  Then we fail to write that block out and clear Uptodate on the
page, and then we start spewing these errors.

Normally we're protected by the tree lock to a certain degree here.  If
we read a block we have that block read locked, and we block the writer
from locking the block before we submit it for the write.  However this
isn't necessarily fool proof because the read could happen before we do
the submit_bio and after we locked and unlocked the extent buffer.

Also in this particular case we have path->skip_locking set, so that
won't save us here.  We'll simply get a block that was valid when we
read it, but became invalid while we were using it.

What we really want is to catch the case where we've "read" a block but
it's not marked Uptodate.  On read we ClearPageError(), so if we're
!Uptodate and !Error we know we didn't do the right thing for reading
the page.

Fix this by checking !Uptodate && !Error, this way we will not complain
if our buffer gets invalidated while we're using it, and we'll maintain
the spirit of the check which is to make sure we have a fully in-cache
block while we're messing with it.

CC: stable@vger.kernel.org # 5.4+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2 years agobtrfs: fix lost prealloc extents beyond eof after full fsync
Filipe Manana [Thu, 17 Feb 2022 12:12:02 +0000 (12:12 +0000)]
btrfs: fix lost prealloc extents beyond eof after full fsync

When doing a full fsync, if we have prealloc extents beyond (or at) eof,
and the leaves that contain them were not modified in the current
transaction, we end up not logging them. This results in losing those
extents when we replay the log after a power failure, since the inode is
truncated to the current value of the logged i_size.

Just like for the fast fsync path, we need to always log all prealloc
extents starting at or beyond i_size. The fast fsync case was fixed in
commit 471d557afed155 ("Btrfs: fix loss of prealloc extents past i_size
after fsync log replay") but it missed the full fsync path. The problem
exists since the very early days, when the log tree was added by
commit e02119d5a7b439 ("Btrfs: Add a write ahead tree log to optimize
synchronous operations").

Example reproducer:

  $ mkfs.btrfs -f /dev/sdc
  $ mount /dev/sdc /mnt

  # Create our test file with many file extent items, so that they span
  # several leaves of metadata, even if the node/page size is 64K. Use
  # direct IO and not fsync/O_SYNC because it's both faster and it avoids
  # clearing the full sync flag from the inode - we want the fsync below
  # to trigger the slow full sync code path.
  $ xfs_io -f -d -c "pwrite -b 4K 0 16M" /mnt/foo

  # Now add two preallocated extents to our file without extending the
  # file's size. One right at i_size, and another further beyond, leaving
  # a gap between the two prealloc extents.
  $ xfs_io -c "falloc -k 16M 1M" /mnt/foo
  $ xfs_io -c "falloc -k 20M 1M" /mnt/foo

  # Make sure everything is durably persisted and the transaction is
  # committed. This makes all created extents to have a generation lower
  # than the generation of the transaction used by the next write and
  # fsync.
  sync

  # Now overwrite only the first extent, which will result in modifying
  # only the first leaf of metadata for our inode. Then fsync it. This
  # fsync will use the slow code path (inode full sync bit is set) because
  # it's the first fsync since the inode was created/loaded.
  $ xfs_io -c "pwrite 0 4K" -c "fsync" /mnt/foo

  # Extent list before power failure.
  $ xfs_io -c "fiemap -v" /mnt/foo
  /mnt/foo:
   EXT: FILE-OFFSET      BLOCK-RANGE      TOTAL FLAGS
     0: [0..7]:          2178048..2178055     8   0x0
     1: [8..16383]:      26632..43007     16376   0x0
     2: [16384..32767]:  2156544..2172927 16384   0x0
     3: [32768..34815]:  2172928..2174975  2048 0x800
     4: [34816..40959]:  hole              6144
     5: [40960..43007]:  2174976..2177023  2048 0x801

  <power fail>

  # Mount fs again, trigger log replay.
  $ mount /dev/sdc /mnt

  # Extent list after power failure and log replay.
  $ xfs_io -c "fiemap -v" /mnt/foo
  /mnt/foo:
   EXT: FILE-OFFSET      BLOCK-RANGE      TOTAL FLAGS
     0: [0..7]:          2178048..2178055     8   0x0
     1: [8..16383]:      26632..43007     16376   0x0
     2: [16384..32767]:  2156544..2172927 16384   0x1

  # The prealloc extents at file offsets 16M and 20M are missing.

So fix this by calling btrfs_log_prealloc_extents() when we are doing a
full fsync, so that we always log all prealloc extents beyond eof.

A test case for fstests will follow soon.

CC: stable@vger.kernel.org # 4.19+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2 years agobtrfs: subpage: fix a wrong check on subpage->writers
Qu Wenruo [Fri, 18 Feb 2022 02:13:00 +0000 (10:13 +0800)]
btrfs: subpage: fix a wrong check on subpage->writers

[BUG]
When looping btrfs/074 with 64K page size and 4K sectorsize, there is a
low chance (1/50~1/100) to crash with the following ASSERT() triggered
in btrfs_subpage_start_writer():

ret = atomic_add_return(nbits, &subpage->writers);
ASSERT(ret == nbits); <<< This one <<<

[CAUSE]
With more debugging output on the parameters of
btrfs_subpage_start_writer(), it shows a very concerning error:

  ret=29 nbits=13 start=393216 len=53248

For @nbits it's correct, but @ret which is the returned value from
atomic_add_return(), it's not only larger than nbits, but also larger
than max sectors per page value (for 64K page size and 4K sector size,
it's 16).

This indicates that some call sites are not properly decreasing the value.

And that's exactly the case, in btrfs_page_unlock_writer(), due to the
fact that we can have page locked either by lock_page() or
process_one_page(), we have to check if the subpage has any writer.

If no writers, it's locked by lock_page() and we only need to unlock it.

But unfortunately the check for the writers are completely opposite:

if (atomic_read(&subpage->writers))
/* No writers, locked by plain lock_page() */
return unlock_page(page);

We directly unlock the page if it has writers, which is the completely
opposite what we want.

Thankfully the affected call site is only limited to
extent_write_locked_range(), so it's mostly affecting compressed write.

[FIX]
Just fix the wrong check condition to fix the bug.

Fixes: e55a0de18572 ("btrfs: rework page locking in __extent_writepage()")
CC: stable@vger.kernel.org # 5.16
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2 years agoerofs: fix ztailpacking on > 4GiB filesystems
Gao Xiang [Tue, 22 Feb 2022 03:31:18 +0000 (11:31 +0800)]
erofs: fix ztailpacking on > 4GiB filesystems

z_idataoff here is an absolute physical offset, so it should use
erofs_off_t (64 bits at least). Otherwise, it'll get trimmed and
cause the decompresion failure.

Link: https://lore.kernel.org/r/20220222033118.20540-1-hsiangkao@linux.alibaba.com
Fixes: ab92184ff8f1 ("erofs: add on-disk compressed tail-packing inline support")
Reviewed-by: Yue Hu <huyue2@yulong.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
2 years agoALSA: intel_hdmi: Fix reference to PCM buffer address
Zhen Ni [Wed, 2 Mar 2022 07:42:41 +0000 (15:42 +0800)]
ALSA: intel_hdmi: Fix reference to PCM buffer address

PCM buffers might be allocated dynamically when the buffer
preallocation failed or a larger buffer is requested, and it's not
guaranteed that substream->dma_buffer points to the actually used
buffer.  The driver needs to refer to substream->runtime->dma_addr
instead for the buffer address.

Signed-off-by: Zhen Ni <nizhen@uniontech.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220302074241.30469-1-nizhen@uniontech.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2 years agobatman-adv: Don't expect inter-netns unique iflink indices
Sven Eckelmann [Sun, 27 Feb 2022 22:23:49 +0000 (23:23 +0100)]
batman-adv: Don't expect inter-netns unique iflink indices

The ifindex doesn't have to be unique for multiple network namespaces on
the same machine.

  $ ip netns add test1
  $ ip -net test1 link add dummy1 type dummy
  $ ip netns add test2
  $ ip -net test2 link add dummy2 type dummy

  $ ip -net test1 link show dev dummy1
  6: dummy1: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
      link/ether 96:81:55:1e:dd:85 brd ff:ff:ff:ff:ff:ff
  $ ip -net test2 link show dev dummy2
  6: dummy2: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
      link/ether 5a:3c:af:35:07:c3 brd ff:ff:ff:ff:ff:ff

But the batman-adv code to walk through the various layers of virtual
interfaces uses this assumption because dev_get_iflink handles it
internally and doesn't return the actual netns of the iflink. And
dev_get_iflink only documents the situation where ifindex == iflink for
physical devices.

But only checking for dev->netdev_ops->ndo_get_iflink is also not an option
because ipoib_get_iflink implements it even when it sometimes returns an
iflink != ifindex and sometimes iflink == ifindex. The caller must
therefore make sure itself to check both netns and iflink + ifindex for
equality. Only when they are equal, a "physical" interface was detected
which should stop the traversal. On the other hand, vxcan_get_iflink can
also return 0 in case there was currently no valid peer. In this case, it
is still necessary to stop.

Fixes: b7eddd0b3950 ("batman-adv: prevent using any virtual device created on batman-adv as hard-interface")
Fixes: 5ed4a460a1d3 ("batman-adv: additional checks for virtual interfaces on top of WiFi")
Reported-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2 years agobatman-adv: Request iflink once in batadv_get_real_netdevice
Sven Eckelmann [Sun, 27 Feb 2022 23:01:24 +0000 (00:01 +0100)]
batman-adv: Request iflink once in batadv_get_real_netdevice

There is no need to call dev_get_iflink multiple times for the same
net_device in batadv_get_real_netdevice. And since some of the
ndo_get_iflink callbacks are dynamic (for example via RCUs like in
vxcan_get_iflink), it could easily happen that the returned values are not
stable. The pre-checks before __dev_get_by_index are then of course bogus.

Fixes: 5ed4a460a1d3 ("batman-adv: additional checks for virtual interfaces on top of WiFi")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2 years agobatman-adv: Request iflink once in batadv-on-batadv check
Sven Eckelmann [Sun, 27 Feb 2022 23:01:24 +0000 (00:01 +0100)]
batman-adv: Request iflink once in batadv-on-batadv check

There is no need to call dev_get_iflink multiple times for the same
net_device in batadv_is_on_batman_iface. And since some of the
.ndo_get_iflink callbacks are dynamic (for example via RCUs like in
vxcan_get_iflink), it could easily happen that the returned values are not
stable. The pre-checks before __dev_get_by_index are then of course bogus.

Fixes: b7eddd0b3950 ("batman-adv: prevent using any virtual device created on batman-adv as hard-interface")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2 years agoInput: elan_i2c - fix regulator enable count imbalance after suspend/resume
Hans de Goede [Tue, 1 Mar 2022 07:39:50 +0000 (23:39 -0800)]
Input: elan_i2c - fix regulator enable count imbalance after suspend/resume

Before these changes elan_suspend() would only disable the regulator
when device_may_wakeup() returns false; whereas elan_resume() would
unconditionally enable it, leading to an enable count imbalance when
device_may_wakeup() returns true.

This triggers the "WARN_ON(regulator->enable_count)" in regulator_put()
when the elan_i2c driver gets unbound, this happens e.g. with the
hot-plugable dock with Elan I2C touchpad for the Asus TF103C 2-in-1.

Fix this by making the regulator_enable() call also be conditional
on device_may_wakeup() returning false.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220131135436.29638-2-hdegoede@redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2 years agoInput: elan_i2c - move regulator_[en|dis]able() out of elan_[en|dis]able_power()
Hans de Goede [Tue, 1 Mar 2022 07:39:38 +0000 (23:39 -0800)]
Input: elan_i2c - move regulator_[en|dis]able() out of elan_[en|dis]able_power()

elan_disable_power() is called conditionally on suspend, where as
elan_enable_power() is always called on resume. This leads to
an imbalance in the regulator's enable count.

Move the regulator_[en|dis]able() calls out of elan_[en|dis]able_power()
in preparation of fixing this.

No functional changes intended.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220131135436.29638-1-hdegoede@redhat.com
[dtor: consolidate elan_[en|dis]able() into elan_set_power()]
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2 years agotracing/histogram: Fix sorting on old "cpu" value
Steven Rostedt (Google) [Wed, 2 Mar 2022 03:29:04 +0000 (22:29 -0500)]
tracing/histogram: Fix sorting on old "cpu" value

When trying to add a histogram against an event with the "cpu" field, it
was impossible due to "cpu" being a keyword to key off of the running CPU.
So to fix this, it was changed to "common_cpu" to match the other generic
fields (like "common_pid"). But since some scripts used "cpu" for keying
off of the CPU (for events that did not have "cpu" as a field, which is
most of them), a backward compatibility trick was added such that if "cpu"
was used as a key, and the event did not have "cpu" as a field name, then
it would fallback and switch over to "common_cpu".

This fix has a couple of subtle bugs. One was that when switching over to
"common_cpu", it did not change the field name, it just set a flag. But
the code still found a "cpu" field. The "cpu" field is used for filtering
and is returned when the event does not have a "cpu" field.

This was found by:

  # cd /sys/kernel/tracing
  # echo hist:key=cpu,pid:sort=cpu > events/sched/sched_wakeup/trigger
  # cat events/sched/sched_wakeup/hist

Which showed the histogram unsorted:

{ cpu:         19, pid:       1175 } hitcount:          1
{ cpu:          6, pid:        239 } hitcount:          2
{ cpu:         23, pid:       1186 } hitcount:         14
{ cpu:         12, pid:        249 } hitcount:          2
{ cpu:          3, pid:        994 } hitcount:          5

Instead of hard coding the "cpu" checks, take advantage of the fact that
trace_event_field_field() returns a special field for "cpu" and "CPU" if
the event does not have "cpu" as a field. This special field has the
"filter_type" of "FILTER_CPU". Check that to test if the returned field is
of the CPU type instead of doing the string compare.

Also, fix the sorting bug by testing for the hist_field flag of
HIST_FIELD_FL_CPU when setting up the sort routine. Otherwise it will use
the special CPU field to know what compare routine to use, and since that
special field does not have a size, it returns tracing_map_cmp_none.

Cc: stable@vger.kernel.org
Fixes: 1e3bac71c505 ("tracing/histogram: Rename "cpu" to "common_cpu"")
Reported-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agonet: dsa: restore error path of dsa_tree_change_tag_proto
Vladimir Oltean [Mon, 28 Feb 2022 14:17:15 +0000 (16:17 +0200)]
net: dsa: restore error path of dsa_tree_change_tag_proto

When the DSA_NOTIFIER_TAG_PROTO returns an error, the user space process
which initiated the protocol change exits the kernel processing while
still holding the rtnl_mutex. So any other process attempting to lock
the rtnl_mutex would deadlock after such event.

The error handling of DSA_NOTIFIER_TAG_PROTO was inadvertently changed
by the blamed commit, introducing this regression. We must still call
rtnl_unlock(), and we must still call DSA_NOTIFIER_TAG_PROTO for the old
protocol. The latter is due to the limiting design of notifier chains
for cross-chip operations, which don't have a built-in error recovery
mechanism - we should look into using notifier_call_chain_robust for that.

Fixes: dc452a471dba ("net: dsa: introduce tagger-owned storage for private and shared data")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20220228141715.146485-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge tag 'for-net-2022-03-01' of git://git.kernel.org/pub/scm/linux/kernel/git/bluet...
Jakub Kicinski [Wed, 2 Mar 2022 01:16:46 +0000 (17:16 -0800)]
Merge tag 'for-net-2022-03-01' of git://git./linux/kernel/git/bluetooth/bluetooth

Luiz Augusto von Dentz says:

====================
bluetooth pull request for net:

 - Fix regression with scanning not working in some systems.

* tag 'for-net-2022-03-01' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth:
  Bluetooth: Fix not checking MGMT cmd pending queue
====================

Link: https://lore.kernel.org/r/20220302004330.125536-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoBluetooth: Fix not checking MGMT cmd pending queue
Brian Gix [Tue, 1 Mar 2022 22:34:57 +0000 (14:34 -0800)]
Bluetooth: Fix not checking MGMT cmd pending queue

A number of places in the MGMT handlers we examine the command queue for
other commands (in progress but not yet complete) that will interact
with the process being performed. However, not all commands go into the
queue if one of:

1. There is no negative side effect of consecutive or redundent commands
2. The command is entirely perform "inline".

This change examines each "pending command" check, and if it is not
needed, deletes the check. Of the remaining pending command checks, we
make sure that the command is in the pending queue by using the
mgmt_pending_add/mgmt_pending_remove pair rather than the
mgmt_pending_new/mgmt_pending_free pair.

Link: https://lore.kernel.org/linux-bluetooth/f648f2e11bb3c2974c32e605a85ac3a9fac944f1.camel@redhat.com/T/
Tested-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Brian Gix <brian.gix@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
2 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
Jakub Kicinski [Tue, 1 Mar 2022 23:13:46 +0000 (15:13 -0800)]
Merge git://git./linux/kernel/git/netfilter/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

1) Use kfree_rcu(ptr, rcu) variant, using kfree_rcu(ptr) was not
   intentional. From Eric Dumazet.

2) Use-after-free in netfilter hook core, from Eric Dumazet.

3) Missing rcu read lock side for netfilter egress hook,
   from Florian Westphal.

4) nf_queue assume state->sk is full socket while it might not be.
   Invoke sock_gen_put(), from Florian Westphal.

5) Add selftest to exercise the reported KASAN splat in 4)

6) Fix possible use-after-free in nf_queue in case sk_refcnt is 0.
   Also from Florian.

7) Use input interface index only for hardware offload, not for
   the software plane. This breaks tc ct action. Patch from Paul Blakey.

* git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  net/sched: act_ct: Fix flow table lookup failure with no originating ifindex
  netfilter: nf_queue: handle socket prefetch
  netfilter: nf_queue: fix possible use-after-free
  selftests: netfilter: add nfqueue TCP_NEW_SYN_RECV socket race test
  netfilter: nf_queue: don't assume sk is full socket
  netfilter: egress: silence egress hook lockdep splats
  netfilter: fix use-after-free in __nf_register_net_hook()
  netfilter: nf_tables: prefer kfree_rcu(ptr, rcu) variant
====================

Link: https://lore.kernel.org/r/20220301215337.378405-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet/sched: act_ct: Fix flow table lookup failure with no originating ifindex
Paul Blakey [Mon, 28 Feb 2022 09:23:49 +0000 (11:23 +0200)]
net/sched: act_ct: Fix flow table lookup failure with no originating ifindex

After cited commit optimizted hw insertion, flow table entries are
populated with ifindex information which was intended to only be used
for HW offload. This tuple ifindex is hashed in the flow table key, so
it must be filled for lookup to be successful. But tuple ifindex is only
relevant for the netfilter flowtables (nft), so it's not filled in
act_ct flow table lookup, resulting in lookup failure, and no SW
offload and no offload teardown for TCP connection FIN/RST packets.

To fix this, add new tc ifindex field to tuple, which will
only be used for offloading, not for lookup, as it will not be
part of the tuple hash.

Fixes: 9795ded7f924 ("net/sched: act_ct: Fill offloading tuple iifidx")
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Tue, 1 Mar 2022 20:01:18 +0000 (12:01 -0800)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "The bigger part of the change is a revert for x86 hosts. Here the
  second patch was supposed to fix the first, but in reality it was just
  as broken, so both have to go.

  x86 host:

   - Revert incorrect assumption that cr3 changes come with preempt
     notifier callbacks (they don't when static branches are changed,
     for example)

  ARM host:

   - Correctly synchronise PMR and co on PSCI CPU_SUSPEND

   - Skip tests that depend on GICv3 when the HW isn't available"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: selftests: aarch64: Skip tests if we can't create a vgic-v3
  Revert "KVM: VMX: Save HOST_CR3 in vmx_prepare_switch_to_guest()"
  Revert "KVM: VMX: Save HOST_CR3 in vmx_set_host_fs_gs()"
  KVM: arm64: Don't miss pending interrupts for suspended vCPU

2 years agos390/extable: fix exception table sorting
Heiko Carstens [Thu, 24 Feb 2022 21:03:29 +0000 (22:03 +0100)]
s390/extable: fix exception table sorting

s390 has a swap_ex_entry_fixup function, however it is not being used
since common code expects a swap_ex_entry_fixup define. If it is not
defined the default implementation will be used. So fix this by adding
a proper define.
However also the implementation of the function must be fixed, since a
NULL value for handler has a special meaning and must not be adjusted.

Luckily all of this doesn't fix a real bug currently: the main extable
is correctly sorted during build time, and for runtime sorting there
is currently no case where the handler field is not NULL.

Fixes: 05a68e892e89 ("s390/kernel: expand exception table logic to allow new handling options")
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2 years agos390/ftrace: fix arch_ftrace_get_regs implementation
Heiko Carstens [Tue, 22 Feb 2022 13:53:47 +0000 (14:53 +0100)]
s390/ftrace: fix arch_ftrace_get_regs implementation

arch_ftrace_get_regs is supposed to return a struct pt_regs pointer
only if the pt_regs structure contains all register contents, which
means it must have been populated when created via ftrace_regs_caller.

If it was populated via ftrace_caller the contents are not complete
(the psw mask part is missing), and therefore a NULL pointer needs be
returned.

The current code incorrectly always returns a struct pt_regs pointer.

Fix this by adding another pt_regs flag which indicates if the
contents are complete, and fix arch_ftrace_get_regs accordingly.

Fixes: 894979689d3a ("s390/ftrace: provide separate ftrace_caller/ftrace_regs_caller implementations")
Reported-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reported-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2 years agos390/ftrace: fix ftrace_caller/ftrace_regs_caller generation
Heiko Carstens [Wed, 23 Feb 2022 12:02:59 +0000 (13:02 +0100)]
s390/ftrace: fix ftrace_caller/ftrace_regs_caller generation

ftrace_caller was used for both ftrace_caller and ftrace_regs_caller,
which means that the target address of the hotpatch trampoline was
never updated.

With commit 894979689d3a ("s390/ftrace: provide separate
ftrace_caller/ftrace_regs_caller implementations") a separate
ftrace_regs_caller entry point was implemeted, however it was
forgotten to implement the necessary changes for ftrace_modify_call
and ftrace_make_call, where the branch target has to be modified
accordingly.

Therefore add the missing code now.

Fixes: 894979689d3a ("s390/ftrace: provide separate ftrace_caller/ftrace_regs_caller implementations")
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2 years agos390/setup: preserve memory at OLDMEM_BASE and OLDMEM_SIZE
Alexander Egorenkov [Wed, 9 Feb 2022 10:25:09 +0000 (11:25 +0100)]
s390/setup: preserve memory at OLDMEM_BASE and OLDMEM_SIZE

We need to preserve the values at OLDMEM_BASE and OLDMEM_SIZE which are
used by zgetdump in case when kdump crashes. In that case zgetdump will
attempt to read OLDMEM_BASE and OLDMEM_SIZE in order to find out where
the memory range [0 - OLDMEM_SIZE] belonging to the production kernel is.

Fixes: f1a546947431 ("s390/setup: don't reserve memory that occupied decompressor's head")
Cc: stable@vger.kernel.org # 5.15+
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Acked-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2 years agodrm/vrr: Set VRR capable prop only if it is attached to connector
Manasi Navare [Fri, 25 Feb 2022 01:30:54 +0000 (17:30 -0800)]
drm/vrr: Set VRR capable prop only if it is attached to connector

VRR capable property is not attached by default to the connector
It is attached only if VRR is supported.
So if the driver tries to call drm core set prop function without
it being attached that causes NULL dereference.

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220225013055.9282-1-manasi.d.navare@intel.com
2 years agoMerge tag 'binfmt_elf-v5.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 1 Mar 2022 19:31:37 +0000 (11:31 -0800)]
Merge tag 'binfmt_elf-v5.17-rc7' of git://git./linux/kernel/git/kees/linux

Pull binfmt_elf fix from Kees Cook:
 "This addresses a regression[1] under ia64 where some ET_EXEC binaries
  were not loading"

Link: https://linux-regtracking.leemhuis.info/regzbot/regression/a3edd529-c42d-3b09-135c-7e98a15b150f@leemhuis.info/
- Fix ia64 ET_EXEC loading

* tag 'binfmt_elf-v5.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  binfmt_elf: Avoid total_mapping_size for ET_EXEC

2 years agobinfmt_elf: Avoid total_mapping_size for ET_EXEC
Kees Cook [Mon, 28 Feb 2022 18:59:12 +0000 (10:59 -0800)]
binfmt_elf: Avoid total_mapping_size for ET_EXEC

Partially revert commit 5f501d555653 ("binfmt_elf: reintroduce using
MAP_FIXED_NOREPLACE"), which applied the ET_DYN "total_mapping_size"
logic also to ET_EXEC.

At least ia64 has ET_EXEC PT_LOAD segments that are not virtual-address
contiguous (but _are_ file-offset contiguous). This would result in a
giant mapping attempting to cover the entire span, including the virtual
address range hole, and well beyond the size of the ELF file itself,
causing the kernel to refuse to load it. For example:

$ readelf -lW /usr/bin/gcc
...
Program Headers:
  Type Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   ...
...
  LOAD 0x000000 0x4000000000000000 0x4000000000000000 0x00b5a0 0x00b5a0 ...
  LOAD 0x00b5a0 0x600000000000b5a0 0x600000000000b5a0 0x0005ac 0x000710 ...
...
       ^^^^^^^^ ^^^^^^^^^^^^^^^^^^                    ^^^^^^^^ ^^^^^^^^

File offset range     : 0x000000-0x00bb4c
0x00bb4c bytes

Virtual address range : 0x4000000000000000-0x600000000000bcb0
0x200000000000bcb0 bytes

Remove the total_mapping_size logic for ET_EXEC, which reduces the
ET_EXEC MAP_FIXED_NOREPLACE coverage to only the first PT_LOAD (better
than nothing), and retains it for ET_DYN.

Ironically, this is the reverse of the problem that originally caused
problems with MAP_FIXED_NOREPLACE: overlapping PT_LOAD segments. Future
work could restore full coverage if load_elf_binary() were to perform
mappings in a separate phase from the loading (where it could resolve
both overlaps and holes).

Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-mm@kvack.org
Reported-by: matoro <matoro_bugzilla_kernel@matoro.tk>
Fixes: 5f501d555653 ("binfmt_elf: reintroduce using MAP_FIXED_NOREPLACE")
Link: https://lore.kernel.org/r/a3edd529-c42d-3b09-135c-7e98a15b150f@leemhuis.info
Tested-by: matoro <matoro_mailinglist_kernel@matoro.tk>
Link: https://lore.kernel.org/lkml/ce8af9c13bcea9230c7689f3c1e0e2cd@matoro.tk
Tested-By: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/lkml/49182d0d-708b-4029-da5f-bc18603440a6@physik.fu-berlin.de
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
2 years agothermal: core: Fix TZ_GET_TRIP NULL pointer dereference
Nicolas Cavallari [Mon, 28 Feb 2022 11:03:51 +0000 (12:03 +0100)]
thermal: core: Fix TZ_GET_TRIP NULL pointer dereference

Do not call get_trip_hyst() from thermal_genl_cmd_tz_get_trip() if
the thermal zone does not define one.

Fixes: 1ce50e7d408e ("thermal: core: genetlink support for events/cmd/sampling")
Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
Cc: 5.10+ <stable@vger.kernel.org> # 5.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2 years agoMerge tag 'wireless-for-net-2022-03-01' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Tue, 1 Mar 2022 14:45:55 +0000 (14:45 +0000)]
Merge tag 'wireless-for-net-2022-03-01' of git://git./linux/kernel/git/wireless/wireless

johannes Berg says:

====================

Some last-minute fixes:
 * rfkill
   - add missing rfill_soft_blocked() when disabled

 * cfg80211
   - handle a nla_memdup() failure correctly
   - fix CONFIG_CFG80211_EXTRA_REGDB_KEYDIR typo in
     Makefile

 * mac80211
   - fix EAPOL handling in 802.3 RX path
   - reject setting up aggregation sessions before
     connection is authorized to avoid timeouts or
     similar
   - handle some SAE authentication steps correctly
   - fix AC selection in mesh forwarding

 * iwlwifi
   - remove TWT support as it causes firmware crashes
     when the AP isn't behaving correctly
   - check debugfs pointer before dereferncing it
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agocfg80211: fix CONFIG_CFG80211_EXTRA_REGDB_KEYDIR typo
Johannes Berg [Mon, 21 Feb 2022 14:55:12 +0000 (15:55 +0100)]
cfg80211: fix CONFIG_CFG80211_EXTRA_REGDB_KEYDIR typo

The kbuild change here accidentally removed not only the
unquoting, but also the last character of the variable
name. Fix that.

Fixes: 129ab0d2d9f3 ("kbuild: do not quote string values in include/config/auto.conf")
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20220221155512.1d25895f7c5f.I50fa3d4189fcab90a2896fe8cae215035dae9508@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2 years agonetfilter: nf_queue: handle socket prefetch
Florian Westphal [Mon, 28 Feb 2022 23:46:19 +0000 (00:46 +0100)]
netfilter: nf_queue: handle socket prefetch

In case someone combines bpf socket assign and nf_queue, then we will
queue an skb who references a struct sock that did not have its
reference count incremented.

As we leave rcu protection, there is no guarantee that skb->sk is still
valid.

For refcount-less skb->sk case, try to increment the reference count
and then override the destructor.

In case of failure we have two choices: orphan the skb and 'delete'
preselect or let nf_queue() drop the packet.

Do the latter, it should not happen during normal operation.

Fixes: cf7fbe660f2d ("bpf: Add socket assign support")
Acked-by: Joe Stringer <joe@cilium.io>
Signed-off-by: Florian Westphal <fw@strlen.de>
2 years agonetfilter: nf_queue: fix possible use-after-free
Florian Westphal [Mon, 28 Feb 2022 05:22:22 +0000 (06:22 +0100)]
netfilter: nf_queue: fix possible use-after-free

Eric Dumazet says:
  The sock_hold() side seems suspect, because there is no guarantee
  that sk_refcnt is not already 0.

On failure, we cannot queue the packet and need to indicate an
error.  The packet will be dropped by the caller.

v2: split skb prefetch hunk into separate change

Fixes: 271b72c7fa82c ("udp: RCU handling for Unicast packets.")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
2 years agoselftests: netfilter: add nfqueue TCP_NEW_SYN_RECV socket race test
Florian Westphal [Fri, 25 Feb 2022 11:01:23 +0000 (12:01 +0100)]
selftests: netfilter: add nfqueue TCP_NEW_SYN_RECV socket race test

causes:
BUG: KASAN: slab-out-of-bounds in sk_free+0x25/0x80
Write of size 4 at addr ffff888106df0284 by task nf-queue/1459
 sk_free+0x25/0x80
 nf_queue_entry_release_refs+0x143/0x1a0
 nf_reinject+0x233/0x770

... without 'netfilter: nf_queue: don't assume sk is full socket'.

Signed-off-by: Florian Westphal <fw@strlen.de>
2 years agonetfilter: nf_queue: don't assume sk is full socket
Florian Westphal [Fri, 25 Feb 2022 13:02:41 +0000 (14:02 +0100)]
netfilter: nf_queue: don't assume sk is full socket

There is no guarantee that state->sk refers to a full socket.

If refcount transitions to 0, sock_put calls sk_free which then ends up
with garbage fields.

I'd like to thank Oleksandr Natalenko and Jiri Benc for considerable
debug work and pointing out state->sk oddities.

Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener")
Tested-by: Oleksandr Natalenko <oleksandr@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
2 years agomac80211: treat some SAE auth steps as final
Johannes Berg [Thu, 24 Feb 2022 09:39:34 +0000 (10:39 +0100)]
mac80211: treat some SAE auth steps as final

When we get anti-clogging token required (added by the commit
mentioned below), or the other status codes added by the later
commit 4e56cde15f7d ("mac80211: Handle special status codes in
SAE commit") we currently just pretend (towards the internal
state machine of authentication) that we didn't receive anything.

This has the undesirable consequence of retransmitting the prior
frame, which is not expected, because the timer is still armed.

If we just disarm the timer at that point, it would result in
the undesirable side effect of being in this state indefinitely
if userspace crashes, or so.

So to fix this, reset the timer and set a new auth_data->waiting
in order to have no more retransmissions, but to have the data
destroyed when the timer actually fires, which will only happen
if userspace didn't continue (i.e. crashed or abandoned it.)

Fixes: a4055e74a2ff ("mac80211: Don't destroy auth data in case of anti-clogging")
Reported-by: Jouni Malinen <j@w1.fi>
Link: https://lore.kernel.org/r/20220224103932.75964e1d7932.Ia487f91556f29daae734bf61f8181404642e1eec@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2 years agonl80211: Handle nla_memdup failures in handle_nan_filter
Jiasheng Jiang [Tue, 1 Mar 2022 10:00:20 +0000 (18:00 +0800)]
nl80211: Handle nla_memdup failures in handle_nan_filter

As there's potential for failure of the nla_memdup(),
check the return value.

Fixes: a442b761b24b ("cfg80211: add add_nan_func / del_nan_func")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20220301100020.3801187-1-jiasheng@iscas.ac.cn
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2 years agoiwlwifi: mvm: check debugfs_dir ptr before use
Randy Dunlap [Wed, 23 Feb 2022 03:06:30 +0000 (19:06 -0800)]
iwlwifi: mvm: check debugfs_dir ptr before use

When "debugfs=off" is used on the kernel command line, iwiwifi's
mvm module uses an invalid/unchecked debugfs_dir pointer and causes
a BUG:

 BUG: kernel NULL pointer dereference, address: 000000000000004f
 #PF: supervisor read access in kernel mode
 #PF: error_code(0x0000) - not-present page
 PGD 0 P4D 0
 Oops: 0000 [#1] PREEMPT SMP
 CPU: 1 PID: 503 Comm: modprobe Tainted: G        W         5.17.0-rc5 #7
 Hardware name: Dell Inc. Inspiron 15 5510/076F7Y, BIOS 2.4.1 11/05/2021
 RIP: 0010:iwl_mvm_dbgfs_register+0x692/0x700 [iwlmvm]
 Code: 69 a0 be 80 01 00 00 48 c7 c7 50 73 6a a0 e8 95 cf ee e0 48 8b 83 b0 1e 00 00 48 c7 c2 54 73 6a a0 be 64 00 00 00 48 8d 7d 8c <48> 8b 48 50 e8 15 22 07 e1 48 8b 43 28 48 8d 55 8c 48 c7 c7 5f 73
 RSP: 0018:ffffc90000a0ba68 EFLAGS: 00010246
 RAX: ffffffffffffffff RBX: ffff88817d6e3328 RCX: ffff88817d6e3328
 RDX: ffffffffa06a7354 RSI: 0000000000000064 RDI: ffffc90000a0ba6c
 RBP: ffffc90000a0bae0 R08: ffffffff824e4880 R09: ffffffffa069d620
 R10: ffffc90000a0ba00 R11: ffffffffffffffff R12: 0000000000000000
 R13: ffffc90000a0bb28 R14: ffff88817d6e3328 R15: ffff88817d6e3320
 FS:  00007f64dd92d740(0000) GS:ffff88847f640000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 000000000000004f CR3: 000000016fc79001 CR4: 0000000000770ee0
 PKRU: 55555554
 Call Trace:
  <TASK>
  ? iwl_mvm_mac_setup_register+0xbdc/0xda0 [iwlmvm]
  iwl_mvm_start_post_nvm+0x71/0x100 [iwlmvm]
  iwl_op_mode_mvm_start+0xab8/0xb30 [iwlmvm]
  _iwl_op_mode_start+0x6f/0xd0 [iwlwifi]
  iwl_opmode_register+0x6a/0xe0 [iwlwifi]
  ? 0xffffffffa0231000
  iwl_mvm_init+0x35/0x1000 [iwlmvm]
  ? 0xffffffffa0231000
  do_one_initcall+0x5a/0x1b0
  ? kmem_cache_alloc+0x1e5/0x2f0
  ? do_init_module+0x1e/0x220
  do_init_module+0x48/0x220
  load_module+0x2602/0x2bc0
  ? __kernel_read+0x145/0x2e0
  ? kernel_read_file+0x229/0x290
  __do_sys_finit_module+0xc5/0x130
  ? __do_sys_finit_module+0xc5/0x130
  __x64_sys_finit_module+0x13/0x20
  do_syscall_64+0x38/0x90
  entry_SYSCALL_64_after_hwframe+0x44/0xae
 RIP: 0033:0x7f64dda564dd
 Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1b 29 0f 00 f7 d8 64 89 01 48
 RSP: 002b:00007ffdba393f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f64dda564dd
 RDX: 0000000000000000 RSI: 00005575399e2ab2 RDI: 0000000000000001
 RBP: 000055753a91c5e0 R08: 0000000000000000 R09: 0000000000000002
 R10: 0000000000000001 R11: 0000000000000246 R12: 00005575399e2ab2
 R13: 000055753a91ceb0 R14: 0000000000000000 R15: 000055753a923018
  </TASK>
 Modules linked in: btintel(+) btmtk bluetooth vfat snd_hda_codec_hdmi fat snd_hda_codec_realtek snd_hda_codec_generic iwlmvm(+) snd_sof_pci_intel_tgl mac80211 snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence soundwire_bus snd_sof_intel_hda snd_sof_pci snd_sof snd_sof_xtensa_dsp snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core btrfs snd_compress snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec raid6_pq iwlwifi snd_hda_core snd_pcm snd_timer snd soundcore cfg80211 intel_ish_ipc(+) thunderbolt rfkill intel_ishtp ucsi_acpi wmi i2c_hid_acpi i2c_hid evdev
 CR2: 000000000000004f
 ---[ end trace 0000000000000000 ]---

Check the debugfs_dir pointer for an error before using it.

Fixes: 8c082a99edb9 ("iwlwifi: mvm: simplify iwl_mvm_dbgfs_register")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: linux-wireless@vger.kernel.org
Cc: Kalle Valo <kvalo@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220223030630.23241-1-rdunlap@infradead.org
[change to make both conditional]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2 years agoiwlwifi: don't advertise TWT support
Golan Ben Ami [Tue, 1 Mar 2022 07:29:26 +0000 (09:29 +0200)]
iwlwifi: don't advertise TWT support

Some APs misbehave when TWT is used and cause our firmware to crash.
We don't know a reasonable way to detect and work around this problem
in the FW yet.  To prevent these crashes, disable TWT in the driver by
stopping to advertise TWT support.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=215523
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
[reworded the commit message]
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/20220301072926.153969-1-luca@coelho.fi
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2 years agorfkill: define rfill_soft_blocked() if !RFKILL
Ben Dooks [Fri, 18 Feb 2022 09:38:58 +0000 (09:38 +0000)]
rfkill: define rfill_soft_blocked() if !RFKILL

If CONFIG_RFKILL is not set, the Intel WiFi driver will not build
the iw_mvm driver part due to the missing rfill_soft_blocked()
call. Adding a inline declaration of rfill_soft_blocked() if
CONFIG_RFKILL=n fixes the following error:

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h: In function 'iwl_mvm_mei_set_sw_rfkill_state':
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h:2215:38: error: implicit declaration of function 'rfkill_soft_blocked'; did you mean 'rfkill_blocked'? [-Werror=implicit-function-declaration]
 2215 |                 mvm->hw_registered ? rfkill_soft_blocked(mvm->hw->wiphy->rfkill) : false;
      |                                      ^~~~~~~~~~~~~~~~~~~
      |                                      rfkill_blocked

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Reported-by: Neill Whillans <neill.whillans@codethink.co.uk>
Fixes: 5bc9a9dd7535 ("rfkill: allow to get the software rfkill state")
Link: https://lore.kernel.org/r/20220218093858.1245677-1-ben.dooks@codethink.co.uk
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2 years agoMIPS: ralink: mt7621: use bitwise NOT instead of logical
Ilya Lipnitskiy [Tue, 1 Mar 2022 01:15:07 +0000 (17:15 -0800)]
MIPS: ralink: mt7621: use bitwise NOT instead of logical

It was the intention to reverse the bits, not make them all zero by
using logical NOT operator.

Fixes: cc19db8b312a ("MIPS: ralink: mt7621: do memory detection on KSEG1")
Suggested-by: Chuanhong Guo <gch981213@gmail.com>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Reviewed-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2 years agoMerge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue
David S. Miller [Tue, 1 Mar 2022 08:33:55 +0000 (08:33 +0000)]
Merge branch '1GbE' of git://git./linux/kernel/git/tnguy/net-queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2022-02-28

This series contains updates to igc and e1000e drivers.

Corinna Vinschen ensures release of hardware sempahore on failed
register read in igc_read_phy_reg_gpy().

Sasha does the same for the write variant, igc_write_phy_reg_gpy(). On
e1000e, he resolves an issue with hardware unit hang on s0ix exit
by disabling some bits and LAN connected device reset during power
management flows. Lastly, he allows for TGP platforms to correct its
NVM checksum.

v2: Fix Fixes tag on patch 3
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoInput: goodix - workaround Cherry Trail devices with a bogus ACPI Interrupt() resource
Hans de Goede [Tue, 1 Mar 2022 06:53:12 +0000 (22:53 -0800)]
Input: goodix - workaround Cherry Trail devices with a bogus ACPI Interrupt() resource

ACPI/x86 devices with a Cherry Trail SoC should have a GpioInt + a regular
GPIO ACPI resource in their ACPI tables.

Some CHT devices have a bug, where the also is bogus interrupt resource
(likely copied from a previous Bay Trail based generation of the device).

The i2c-core-acpi code will assign the bogus, non-working, interrupt
resource to client->irq. Add a workaround to fix this up.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=2043960
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220228111613.363336-1-hdegoede@redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2 years agoInput: goodix - use the new soc_intel_is_byt() helper
Hans de Goede [Tue, 1 Mar 2022 06:52:31 +0000 (22:52 -0800)]
Input: goodix - use the new soc_intel_is_byt() helper

Use the new soc_intel_is_byt() helper from linux/platform_data/x86/soc.h.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220131143539.109142-5-hdegoede@redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2 years agoMerge tag 'v5.17-rc4' into for-linus
Dmitry Torokhov [Tue, 1 Mar 2022 07:12:55 +0000 (23:12 -0800)]
Merge tag 'v5.17-rc4' into for-linus

Merge with mainline to get the Intel ASoC generic helpers header and
other changes.

2 years agopinctrl: sunxi: Use unique lockdep classes for IRQs
Samuel Holland [Wed, 16 Feb 2022 04:00:36 +0000 (22:00 -0600)]
pinctrl: sunxi: Use unique lockdep classes for IRQs

This driver, like several others, uses a chained IRQ for each GPIO bank,
and forwards .irq_set_wake to the GPIO bank's upstream IRQ. As a result,
a call to irq_set_irq_wake() needs to lock both the upstream and
downstream irq_desc's. Lockdep considers this to be a possible deadlock
when the irq_desc's share lockdep classes, which they do by default:

 ============================================
 WARNING: possible recursive locking detected
 5.17.0-rc3-00394-gc849047c2473 #1 Not tainted
 --------------------------------------------
 init/307 is trying to acquire lock:
 c2dfe27c (&irq_desc_lock_class){-.-.}-{2:2}, at: __irq_get_desc_lock+0x58/0xa0

 but task is already holding lock:
 c3c0ac7c (&irq_desc_lock_class){-.-.}-{2:2}, at: __irq_get_desc_lock+0x58/0xa0

 other info that might help us debug this:
  Possible unsafe locking scenario:

        CPU0
        ----
   lock(&irq_desc_lock_class);
   lock(&irq_desc_lock_class);

  *** DEADLOCK ***

  May be due to missing lock nesting notation

 4 locks held by init/307:
  #0: c1f29f18 (system_transition_mutex){+.+.}-{3:3}, at: __do_sys_reboot+0x90/0x23c
  #1: c20f7760 (&dev->mutex){....}-{3:3}, at: device_shutdown+0xf4/0x224
  #2: c2e804d8 (&dev->mutex){....}-{3:3}, at: device_shutdown+0x104/0x224
  #3: c3c0ac7c (&irq_desc_lock_class){-.-.}-{2:2}, at: __irq_get_desc_lock+0x58/0xa0

 stack backtrace:
 CPU: 0 PID: 307 Comm: init Not tainted 5.17.0-rc3-00394-gc849047c2473 #1
 Hardware name: Allwinner sun8i Family
  unwind_backtrace from show_stack+0x10/0x14
  show_stack from dump_stack_lvl+0x68/0x90
  dump_stack_lvl from __lock_acquire+0x1680/0x31a0
  __lock_acquire from lock_acquire+0x148/0x3dc
  lock_acquire from _raw_spin_lock_irqsave+0x50/0x6c
  _raw_spin_lock_irqsave from __irq_get_desc_lock+0x58/0xa0
  __irq_get_desc_lock from irq_set_irq_wake+0x2c/0x19c
  irq_set_irq_wake from irq_set_irq_wake+0x13c/0x19c
    [tail call from sunxi_pinctrl_irq_set_wake]
  irq_set_irq_wake from gpio_keys_suspend+0x80/0x1a4
  gpio_keys_suspend from gpio_keys_shutdown+0x10/0x2c
  gpio_keys_shutdown from device_shutdown+0x180/0x224
  device_shutdown from __do_sys_reboot+0x134/0x23c
  __do_sys_reboot from ret_fast_syscall+0x0/0x1c

However, this can never deadlock because the upstream and downstream
IRQs are never the same (nor do they even involve the same irqchip).

Silence this erroneous lockdep splat by applying what appears to be the
usual fix of moving the GPIO IRQs to separate lockdep classes.

Fixes: a59c99d9eaf9 ("pinctrl: sunxi: Forward calls to irq_set_irq_wake")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220216040037.22730-1-samuel@sholland.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2 years agopinctrl-sunxi: sunxi_pinctrl_gpio_direction_in/output: use correct offset
Hans Verkuil [Wed, 26 Jan 2022 11:02:04 +0000 (12:02 +0100)]
pinctrl-sunxi: sunxi_pinctrl_gpio_direction_in/output: use correct offset

The commit that sets the direction directly without calling
pinctrl_gpio_direction(), forgot to add chip->base to the offset when
calling sunxi_pmx_gpio_set_direction().

This caused failures for various Allwinner boards which have two
GPIO blocks.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: 5kft <5kft@5kft.org>
Suggested-by: 5kft <5kft@5kft.org>
Reported-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Fixes: 8df89a7cbc63 (pinctrl-sunxi: don't call pinctrl_gpio_direction())
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Tested-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/0f536cd8-01db-5d16-2cec-ec6d19409a49@xs4all.nl
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
[Picked from linux-next to pinctrl fixes]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2 years agoe1000e: Correct NVM checksum verification flow
Sasha Neftin [Thu, 3 Feb 2022 12:21:49 +0000 (14:21 +0200)]
e1000e: Correct NVM checksum verification flow

Update MAC type check e1000_pch_tgp because for e1000_pch_cnp,
NVM checksum update is still possible.
Emit a more detailed warning message.

Bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=1191663
Fixes: 4051f68318ca ("e1000e: Do not take care about recovery NVM checksum")
Reported-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoe1000e: Fix possible HW unit hang after an s0ix exit
Sasha Neftin [Tue, 25 Jan 2022 17:31:23 +0000 (19:31 +0200)]
e1000e: Fix possible HW unit hang after an s0ix exit

Disable the OEM bit/Gig Disable/restart AN impact and disable the PHY
LAN connected device (LCD) reset during power management flows. This
fixes possible HW unit hangs on the s0ix exit on some corporate ADL
platforms.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=214821
Fixes: 3e55d231716e ("e1000e: Add handshake with the CSME to support S0ix")
Suggested-by: Dima Ruinskiy <dima.ruinskiy@intel.com>
Suggested-by: Nir Efrati <nir.efrati@intel.com>
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agonetfilter: egress: silence egress hook lockdep splats
Florian Westphal [Mon, 28 Feb 2022 03:18:05 +0000 (04:18 +0100)]
netfilter: egress: silence egress hook lockdep splats

Netfilter assumes its called with rcu_read_lock held, but in egress
hook case it may be called with BH readlock.

This triggers lockdep splat.

In order to avoid to change all rcu_dereference() to
rcu_dereference_check(..., rcu_read_lock_bh_held()), wrap nf_hook_slow
with read lock/unlock pair.

Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2 years agonetfilter: fix use-after-free in __nf_register_net_hook()
Eric Dumazet [Sun, 27 Feb 2022 18:01:41 +0000 (10:01 -0800)]
netfilter: fix use-after-free in __nf_register_net_hook()

We must not dereference @new_hooks after nf_hook_mutex has been released,
because other threads might have freed our allocated hooks already.

BUG: KASAN: use-after-free in nf_hook_entries_get_hook_ops include/linux/netfilter.h:130 [inline]
BUG: KASAN: use-after-free in hooks_validate net/netfilter/core.c:171 [inline]
BUG: KASAN: use-after-free in __nf_register_net_hook+0x77a/0x820 net/netfilter/core.c:438
Read of size 2 at addr ffff88801c1a8000 by task syz-executor237/4430

CPU: 1 PID: 4430 Comm: syz-executor237 Not tainted 5.17.0-rc5-syzkaller-00306-g2293be58d6a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description.constprop.0.cold+0x8d/0x336 mm/kasan/report.c:255
 __kasan_report mm/kasan/report.c:442 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
 nf_hook_entries_get_hook_ops include/linux/netfilter.h:130 [inline]
 hooks_validate net/netfilter/core.c:171 [inline]
 __nf_register_net_hook+0x77a/0x820 net/netfilter/core.c:438
 nf_register_net_hook+0x114/0x170 net/netfilter/core.c:571
 nf_register_net_hooks+0x59/0xc0 net/netfilter/core.c:587
 nf_synproxy_ipv6_init+0x85/0xe0 net/netfilter/nf_synproxy_core.c:1218
 synproxy_tg6_check+0x30d/0x560 net/ipv6/netfilter/ip6t_SYNPROXY.c:81
 xt_check_target+0x26c/0x9e0 net/netfilter/x_tables.c:1038
 check_target net/ipv6/netfilter/ip6_tables.c:530 [inline]
 find_check_entry.constprop.0+0x7f1/0x9e0 net/ipv6/netfilter/ip6_tables.c:573
 translate_table+0xc8b/0x1750 net/ipv6/netfilter/ip6_tables.c:735
 do_replace net/ipv6/netfilter/ip6_tables.c:1153 [inline]
 do_ip6t_set_ctl+0x56e/0xb90 net/ipv6/netfilter/ip6_tables.c:1639
 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
 ipv6_setsockopt+0x122/0x180 net/ipv6/ipv6_sockglue.c:1024
 rawv6_setsockopt+0xd3/0x6a0 net/ipv6/raw.c:1084
 __sys_setsockopt+0x2db/0x610 net/socket.c:2180
 __do_sys_setsockopt net/socket.c:2191 [inline]
 __se_sys_setsockopt net/socket.c:2188 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2188
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f65a1ace7d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f65a1a7f308 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007f65a1ace7d9
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 00007f65a1b574c8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 00007f65a1b55130
R13: 00007f65a1b574c0 R14: 00007f65a1b24090 R15: 0000000000022000
 </TASK>

The buggy address belongs to the page:
page:ffffea0000706a00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c1a8
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea0001c1b108 ffffea000046dd08 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52dc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_ZERO), pid 4430, ts 1061781545818, free_ts 1061791488993
 prep_new_page mm/page_alloc.c:2434 [inline]
 get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4165
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5389
 __alloc_pages_node include/linux/gfp.h:572 [inline]
 alloc_pages_node include/linux/gfp.h:595 [inline]
 kmalloc_large_node+0x62/0x130 mm/slub.c:4438
 __kmalloc_node+0x35a/0x4a0 mm/slub.c:4454
 kmalloc_node include/linux/slab.h:604 [inline]
 kvmalloc_node+0x97/0x100 mm/util.c:580
 kvmalloc include/linux/slab.h:731 [inline]
 kvzalloc include/linux/slab.h:739 [inline]
 allocate_hook_entries_size net/netfilter/core.c:61 [inline]
 nf_hook_entries_grow+0x140/0x780 net/netfilter/core.c:128
 __nf_register_net_hook+0x144/0x820 net/netfilter/core.c:429
 nf_register_net_hook+0x114/0x170 net/netfilter/core.c:571
 nf_register_net_hooks+0x59/0xc0 net/netfilter/core.c:587
 nf_synproxy_ipv6_init+0x85/0xe0 net/netfilter/nf_synproxy_core.c:1218
 synproxy_tg6_check+0x30d/0x560 net/ipv6/netfilter/ip6t_SYNPROXY.c:81
 xt_check_target+0x26c/0x9e0 net/netfilter/x_tables.c:1038
 check_target net/ipv6/netfilter/ip6_tables.c:530 [inline]
 find_check_entry.constprop.0+0x7f1/0x9e0 net/ipv6/netfilter/ip6_tables.c:573
 translate_table+0xc8b/0x1750 net/ipv6/netfilter/ip6_tables.c:735
 do_replace net/ipv6/netfilter/ip6_tables.c:1153 [inline]
 do_ip6t_set_ctl+0x56e/0xb90 net/ipv6/netfilter/ip6_tables.c:1639
 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1352 [inline]
 free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1404
 free_unref_page_prepare mm/page_alloc.c:3325 [inline]
 free_unref_page+0x19/0x690 mm/page_alloc.c:3404
 kvfree+0x42/0x50 mm/util.c:613
 rcu_do_batch kernel/rcu/tree.c:2527 [inline]
 rcu_core+0x7b1/0x1820 kernel/rcu/tree.c:2778
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558

Memory state around the buggy address:
 ffff88801c1a7f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88801c1a7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88801c1a8000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88801c1a8080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88801c1a8100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

Fixes: 2420b79f8c18 ("netfilter: debug: check for sorted array")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2 years agoMerge tag 'soc-fixes-5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Linus Torvalds [Mon, 28 Feb 2022 20:51:14 +0000 (12:51 -0800)]
Merge tag 'soc-fixes-5.17-2' of git://git./linux/kernel/git/soc/soc

Pull ARM SoC fixes from Arnd Bergmann:
 "The code changes address mostly minor problems:

   - Several NXP/FSL SoC driver fixes, addressing issues with error
     handling and compilation

   - Fix a clock disabling imbalance in gpcv2 driver.

   - Arm Juno DMA coherency issue

   - Trivial firmware driver fixes for op-tee and scmi firmware

  The remaining changes address issues in the devicetree files:

   - A timer regression for the OMAP devkit8000, which has to use the
     alternative timer.

   - A hang in the i.MX8MM power domain configuration

   - Multiple fixes for the Rockchip RK3399 addressing issues with sound
     and eMMC

   - Cosmetic fixes for i.MX8ULP, RK3xxx, and Tegra124"

* tag 'soc-fixes-5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (32 commits)
  ARM: tegra: Move panels to AUX bus
  soc: imx: gpcv2: Fix clock disabling imbalance in error path
  soc: fsl: qe: Check of ioremap return value
  soc: fsl: qe: fix typo in a comment
  soc: fsl: guts: Add a missing memory allocation failure check
  soc: fsl: guts: Revert commit 3c0d64e867ed
  soc: fsl: Correct MAINTAINERS database (SOC)
  soc: fsl: Correct MAINTAINERS database (QUICC ENGINE LIBRARY)
  soc: fsl: Replace kernel.h with the necessary inclusions
  dt-bindings: fsl,layerscape-dcfg: add missing compatible for lx2160a
  dt-bindings: qoriq-clock: add missing compatible for lx2160a
  ARM: dts: Use 32KiHz oscillator on devkit8000
  ARM: dts: switch timer config to common devkit8000 devicetree
  tee: optee: fix error return code in probe function
  arm64: dts: imx8ulp: Set #thermal-sensor-cells to 1 as required
  arm64: dts: imx8mm: Fix VPU Hanging
  ARM: dts: rockchip: fix a typo on rk3288 crypto-controller
  ARM: dts: rockchip: reorder rk322x hmdi clocks
  firmware: arm_scmi: Remove space in MODULE_ALIAS name
  arm64: dts: agilex: use the compatible "intel,socfpga-agilex-hsotg"
  ...

2 years agoMerge tag 'efi-urgent-for-v5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 28 Feb 2022 20:44:33 +0000 (12:44 -0800)]
Merge tag 'efi-urgent-for-v5.17-2' of git://git./linux/kernel/git/efi/efi

Pull EFI fixes from Ard Biesheuvel:

 - don't treat valid hartid U32_MAX as a failure return code (RISC-V)

 - avoid blocking query_variable_info() call when blocking is not
   allowed

* tag 'efi-urgent-for-v5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  efivars: Respect "block" flag in efivar_entry_set_safe()
  riscv/efi_stub: Fix get_boot_hartid_from_fdt() return value

2 years agodrm/arm: arm hdlcd select DRM_GEM_CMA_HELPER
Carsten Haitzler [Mon, 24 Jan 2022 16:24:37 +0000 (16:24 +0000)]
drm/arm: arm hdlcd select DRM_GEM_CMA_HELPER

Without DRM_GEM_CMA_HELPER HDLCD won't build. This needs to be there too.

Fixes: 09717af7d13d ("drm: Remove CONFIG_DRM_KMS_CMA_HELPER option")
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Carsten Haitzler <carsten.haitzler@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220124162437.2470344-1-carsten.haitzler@foss.arm.com
2 years agodrm/bridge: ti-sn65dsi86: Properly undo autosuspend
Douglas Anderson [Tue, 22 Feb 2022 22:18:43 +0000 (14:18 -0800)]
drm/bridge: ti-sn65dsi86: Properly undo autosuspend

The PM Runtime docs say:
  Drivers in ->remove() callback should undo the runtime PM changes done
  in ->probe(). Usually this means calling pm_runtime_disable(),
  pm_runtime_dont_use_autosuspend() etc.

We weren't doing that for autosuspend. Let's do it.

Fixes: 9bede63127c6 ("drm/bridge: ti-sn65dsi86: Use pm_runtime autosuspend")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220222141838.1.If784ba19e875e8ded4ec4931601ce6d255845245@changeid
2 years agoigc: igc_write_phy_reg_gpy: drop premature return
Sasha Neftin [Sun, 20 Feb 2022 07:29:15 +0000 (09:29 +0200)]
igc: igc_write_phy_reg_gpy: drop premature return

Similar to "igc_read_phy_reg_gpy: drop premature return" patch.
igc_write_phy_reg_gpy checks the return value from igc_write_phy_reg_mdic
and if it's not 0, returns immediately. By doing this, it leaves the HW
semaphore in the acquired state.

Drop this premature return statement, the function returns after
releasing the semaphore immediately anyway.

Fixes: 5586838fe9ce ("igc: Add code for PHY support")
Suggested-by: Dima Ruinskiy <dima.ruinskiy@intel.com>
Reported-by: Corinna Vinschen <vinschen@redhat.com>
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoigc: igc_read_phy_reg_gpy: drop premature return
Corinna Vinschen [Wed, 16 Feb 2022 13:31:35 +0000 (14:31 +0100)]
igc: igc_read_phy_reg_gpy: drop premature return

igc_read_phy_reg_gpy checks the return value from igc_read_phy_reg_mdic
and if it's not 0, returns immediately. By doing this, it leaves the HW
semaphore in the acquired state.

Drop this premature return statement, the function returns after
releasing the semaphore immediately anyway.

Fixes: 5586838fe9ce ("igc: Add code for PHY support")
Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
Acked-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoARM: 9182/1: mmu: fix returns from early_param() and __setup() functions
Randy Dunlap [Wed, 23 Feb 2022 19:46:35 +0000 (20:46 +0100)]
ARM: 9182/1: mmu: fix returns from early_param() and __setup() functions

early_param() handlers should return 0 on success.
__setup() handlers should return 1 on success, i.e., the parameter
has been handled. A return of 0 would cause the "option=value" string
to be added to init's environment strings, polluting it.

../arch/arm/mm/mmu.c: In function 'test_early_cachepolicy':
../arch/arm/mm/mmu.c:215:1: error: no return statement in function returning non-void [-Werror=return-type]
../arch/arm/mm/mmu.c: In function 'test_noalign_setup':
../arch/arm/mm/mmu.c:221:1: error: no return statement in function returning non-void [-Werror=return-type]

Fixes: b849a60e0903 ("ARM: make cr_alignment read-only #ifndef CONFIG_CPU_CP15")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: patches@armlinux.org.uk
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2 years agoblktrace: fix use after free for struct blk_trace
Yu Kuai [Mon, 28 Feb 2022 03:43:54 +0000 (11:43 +0800)]
blktrace: fix use after free for struct blk_trace

When tracing the whole disk, 'dropped' and 'msg' will be created
under 'q->debugfs_dir' and 'bt->dir' is NULL, thus blk_trace_free()
won't remove those files. What's worse, the following UAF can be
triggered because of accessing stale 'dropped' and 'msg':

==================================================================
BUG: KASAN: use-after-free in blk_dropped_read+0x89/0x100
Read of size 4 at addr ffff88816912f3d8 by task blktrace/1188

CPU: 27 PID: 1188 Comm: blktrace Not tainted 5.17.0-rc4-next-20220217+ #469
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-4
Call Trace:
 <TASK>
 dump_stack_lvl+0x34/0x44
 print_address_description.constprop.0.cold+0xab/0x381
 ? blk_dropped_read+0x89/0x100
 ? blk_dropped_read+0x89/0x100
 kasan_report.cold+0x83/0xdf
 ? blk_dropped_read+0x89/0x100
 kasan_check_range+0x140/0x1b0
 blk_dropped_read+0x89/0x100
 ? blk_create_buf_file_callback+0x20/0x20
 ? kmem_cache_free+0xa1/0x500
 ? do_sys_openat2+0x258/0x460
 full_proxy_read+0x8f/0xc0
 vfs_read+0xc6/0x260
 ksys_read+0xb9/0x150
 ? vfs_write+0x3d0/0x3d0
 ? fpregs_assert_state_consistent+0x55/0x60
 ? exit_to_user_mode_prepare+0x39/0x1e0
 do_syscall_64+0x35/0x80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fbc080d92fd
Code: ce 20 00 00 75 10 b8 00 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 1
RSP: 002b:00007fbb95ff9cb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fbb95ff9dc0 RCX: 00007fbc080d92fd
RDX: 0000000000000100 RSI: 00007fbb95ff9cc0 RDI: 0000000000000045
RBP: 0000000000000045 R08: 0000000000406299 R09: 00000000fffffffd
R10: 000000000153afa0 R11: 0000000000000293 R12: 00007fbb780008c0
R13: 00007fbb78000938 R14: 0000000000608b30 R15: 00007fbb780029c8
 </TASK>

Allocated by task 1050:
 kasan_save_stack+0x1e/0x40
 __kasan_kmalloc+0x81/0xa0
 do_blk_trace_setup+0xcb/0x410
 __blk_trace_setup+0xac/0x130
 blk_trace_ioctl+0xe9/0x1c0
 blkdev_ioctl+0xf1/0x390
 __x64_sys_ioctl+0xa5/0xe0
 do_syscall_64+0x35/0x80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 1050:
 kasan_save_stack+0x1e/0x40
 kasan_set_track+0x21/0x30
 kasan_set_free_info+0x20/0x30
 __kasan_slab_free+0x103/0x180
 kfree+0x9a/0x4c0
 __blk_trace_remove+0x53/0x70
 blk_trace_ioctl+0x199/0x1c0
 blkdev_common_ioctl+0x5e9/0xb30
 blkdev_ioctl+0x1a5/0x390
 __x64_sys_ioctl+0xa5/0xe0
 do_syscall_64+0x35/0x80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff88816912f380
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 88 bytes inside of
 96-byte region [ffff88816912f380ffff88816912f3e0)
The buggy address belongs to the page:
page:000000009a1b4e7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0f
flags: 0x17ffffc0000200(slab|node=0|zone=2|lastcpupid=0x1fffff)
raw: 0017ffffc0000200 ffffea00044f1100 dead000000000002 ffff88810004c780
raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88816912f280: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88816912f300: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88816912f380: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                                                    ^
 ffff88816912f400: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88816912f480: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================

Fixes: c0ea57608b69 ("blktrace: remove debugfs file dentries from struct blk_trace")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220228034354.4047385-1-yukuai3@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoiommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find
Miaoqian Lin [Fri, 7 Jan 2022 08:09:11 +0000 (08:09 +0000)]
iommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find

The reference taken by 'of_find_device_by_node()' must be released when
not needed anymore.
Add the corresponding 'put_device()' in the error handling path.

Fixes: 765a9d1d02b2 ("iommu/tegra-smmu: Fix mc errors on tegra124-nyan")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20220107080915.12686-1-linmq006@gmail.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2 years agoiommu/vt-d: Fix double list_add when enabling VMD in scalable mode
Adrian Huang [Mon, 21 Feb 2022 05:33:48 +0000 (13:33 +0800)]
iommu/vt-d: Fix double list_add when enabling VMD in scalable mode

When enabling VMD and IOMMU scalable mode, the following kernel panic
call trace/kernel log is shown in Eagle Stream platform (Sapphire Rapids
CPU) during booting:

pci 0000:59:00.5: Adding to iommu group 42
...
vmd 0000:59:00.5: PCI host bridge to bus 10000:80
pci 10000:80:01.0: [8086:352a] type 01 class 0x060400
pci 10000:80:01.0: reg 0x10: [mem 0x00000000-0x0001ffff 64bit]
pci 10000:80:01.0: enabling Extended Tags
pci 10000:80:01.0: PME# supported from D0 D3hot D3cold
pci 10000:80:01.0: DMAR: Setup RID2PASID failed
pci 10000:80:01.0: Failed to add to iommu group 42: -16
pci 10000:80:03.0: [8086:352b] type 01 class 0x060400
pci 10000:80:03.0: reg 0x10: [mem 0x00000000-0x0001ffff 64bit]
pci 10000:80:03.0: enabling Extended Tags
pci 10000:80:03.0: PME# supported from D0 D3hot D3cold
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:29!
invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.17.0-rc3+ #7
Hardware name: Lenovo ThinkSystem SR650V3/SB27A86647, BIOS ESE101Y-1.00 01/13/2022
Workqueue: events work_for_cpu_fn
RIP: 0010:__list_add_valid.cold+0x26/0x3f
Code: 9a 4a ab ff 4c 89 c1 48 c7 c7 40 0c d9 9e e8 b9 b1 fe ff 0f
      0b 48 89 f2 4c 89 c1 48 89 fe 48 c7 c7 f0 0c d9 9e e8 a2 b1
      fe ff <0f> 0b 48 89 d1 4c 89 c6 4c 89 ca 48 c7 c7 98 0c d9
      9e e8 8b b1 fe
RSP: 0000:ff5ad434865b3a40 EFLAGS: 00010246
RAX: 0000000000000058 RBX: ff4d61160b74b880 RCX: ff4d61255e1fffa8
RDX: 0000000000000000 RSI: 00000000fffeffff RDI: ffffffff9fd34f20
RBP: ff4d611d8e245c00 R08: 0000000000000000 R09: ff5ad434865b3888
R10: ff5ad434865b3880 R11: ff4d61257fdc6fe8 R12: ff4d61160b74b8a0
R13: ff4d61160b74b8a0 R14: ff4d611d8e245c10 R15: ff4d611d8001ba70
FS:  0000000000000000(0000) GS:ff4d611d5ea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ff4d611fa1401000 CR3: 0000000aa0210001 CR4: 0000000000771ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
 <TASK>
 intel_pasid_alloc_table+0x9c/0x1d0
 dmar_insert_one_dev_info+0x423/0x540
 ? device_to_iommu+0x12d/0x2f0
 intel_iommu_attach_device+0x116/0x290
 __iommu_attach_device+0x1a/0x90
 iommu_group_add_device+0x190/0x2c0
 __iommu_probe_device+0x13e/0x250
 iommu_probe_device+0x24/0x150
 iommu_bus_notifier+0x69/0x90
 blocking_notifier_call_chain+0x5a/0x80
 device_add+0x3db/0x7b0
 ? arch_memremap_can_ram_remap+0x19/0x50
 ? memremap+0x75/0x140
 pci_device_add+0x193/0x1d0
 pci_scan_single_device+0xb9/0xf0
 pci_scan_slot+0x4c/0x110
 pci_scan_child_bus_extend+0x3a/0x290
 vmd_enable_domain.constprop.0+0x63e/0x820
 vmd_probe+0x163/0x190
 local_pci_probe+0x42/0x80
 work_for_cpu_fn+0x13/0x20
 process_one_work+0x1e2/0x3b0
 worker_thread+0x1c4/0x3a0
 ? rescuer_thread+0x370/0x370
 kthread+0xc7/0xf0
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x1f/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
...
Kernel panic - not syncing: Fatal exception
Kernel Offset: 0x1ca00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
---[ end Kernel panic - not syncing: Fatal exception ]---

The following 'lspci' output shows devices '10000:80:*' are subdevices of
the VMD device 0000:59:00.5:

  $ lspci
  ...
  0000:59:00.5 RAID bus controller: Intel Corporation Volume Management Device NVMe RAID Controller (rev 20)
  ...
  10000:80:01.0 PCI bridge: Intel Corporation Device 352a (rev 03)
  10000:80:03.0 PCI bridge: Intel Corporation Device 352b (rev 03)
  10000:80:05.0 PCI bridge: Intel Corporation Device 352c (rev 03)
  10000:80:07.0 PCI bridge: Intel Corporation Device 352d (rev 03)
  10000:81:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller]
  10000:82:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller]

The symptom 'list_add double add' is caused by the following failure
message:

  pci 10000:80:01.0: DMAR: Setup RID2PASID failed
  pci 10000:80:01.0: Failed to add to iommu group 42: -16
  pci 10000:80:03.0: [8086:352b] type 01 class 0x060400

Device 10000:80:01.0 is the subdevice of the VMD device 0000:59:00.5,
so invoking intel_pasid_alloc_table() gets the pasid_table of the VMD
device 0000:59:00.5. Here is call path:

  intel_pasid_alloc_table
    pci_for_each_dma_alias
     get_alias_pasid_table
       search_pasid_table

pci_real_dma_dev() in pci_for_each_dma_alias() gets the real dma device
which is the VMD device 0000:59:00.5. However, pte of the VMD device
0000:59:00.5 has been configured during this message "pci 0000:59:00.5:
Adding to iommu group 42". So, the status -EBUSY is returned when
configuring pasid entry for device 10000:80:01.0.

It then invokes dmar_remove_one_dev_info() to release
'struct device_domain_info *' from iommu_devinfo_cache. But, the pasid
table is not released because of the following statement in
__dmar_remove_one_dev_info():

if (info->dev && !dev_is_real_dma_subdevice(info->dev)) {
...
intel_pasid_free_table(info->dev);
        }

The subsequent dmar_insert_one_dev_info() operation of device
10000:80:03.0 allocates 'struct device_domain_info *' from
iommu_devinfo_cache. The allocated address is the same address that
is released previously for device 10000:80:01.0. Finally, invoking
device_attach_pasid_table() causes the issue.

`git bisect` points to the offending commit 474dd1c65064 ("iommu/vt-d:
Fix clearing real DMA device's scalable-mode context entries"), which
releases the pasid table if the device is not the subdevice by
checking the returned status of dev_is_real_dma_subdevice().
Reverting the offending commit can work around the issue.

The solution is to prevent from allocating pasid table if those
devices are subdevices of the VMD device.

Fixes: 474dd1c65064 ("iommu/vt-d: Fix clearing real DMA device's scalable-mode context entries")
Cc: stable@vger.kernel.org # v5.14+
Signed-off-by: Adrian Huang <ahuang12@lenovo.com>
Link: https://lore.kernel.org/r/20220216091307.703-1-adrianhuang0701@gmail.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20220221053348.262724-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2 years agodrm/i915: s/JSP2/ICP2/ PCH
Ville Syrjälä [Thu, 24 Feb 2022 13:21:42 +0000 (15:21 +0200)]
drm/i915: s/JSP2/ICP2/ PCH

This JSP2 PCH actually seems to be some special Apple
specific ICP variant rather than a JSP. Make it so. Or at
least all the references to it seem to be some Apple ICL
machines. Didn't manage to find these PCI IDs in any
public chipset docs unfortunately.

The only thing we're losing here with this JSP->ICP change
is Wa_14011294188, but based on the HSD that isn't actually
needed on any ICP based design (including JSP), only TGP
based stuff (including MCC) really need it. The documented
w/a just never made that distinction because Windows didn't
want to differentiate between JSP and MCC (not sure how
they handle hpd/ddc/etc. then though...).

Cc: stable@vger.kernel.org
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/4226
Fixes: 943682e3bd19 ("drm/i915: Introduce Jasper Lake PCH")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220224132142.12927-1-ville.syrjala@linux.intel.com
Acked-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Tested-by: Tomas Bzatek <bugs@bzatek.net>
(cherry picked from commit 53581504a8e216d435f114a4f2596ad0dfd902fc)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
2 years agodrm/i915/guc/slpc: Correct the param count for unset param
Vinay Belgaumkar [Wed, 16 Feb 2022 18:15:04 +0000 (10:15 -0800)]
drm/i915/guc/slpc: Correct the param count for unset param

SLPC unset param H2G only needs one parameter - the id of the
param.

Fixes: 025cb07bebfa ("drm/i915/guc/slpc: Cache platform frequency limits")

Suggested-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220216181504.7155-1-vinay.belgaumkar@intel.com
(cherry picked from commit 9648f1c3739505557d94ff749a4f32192ea81fe3)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
2 years agonet: ipa: fix a build dependency
Alex Elder [Fri, 25 Feb 2022 20:15:30 +0000 (14:15 -0600)]
net: ipa: fix a build dependency

An IPA build problem arose in the linux-next tree the other day.
The problem is that a recent commit adds a new dependency on some
code, and the Kconfig file for IPA doesn't reflect that dependency.
As a result, some configurations can fail to build (particularly
when COMPILE_TEST is enabled).

The recent patch adds calls to qmp_get(), qmp_put(), and qmp_send(),
and those are built based on the QCOM_AOSS_QMP config option.  If
that symbol is not defined, stubs are defined, so we just need to
ensure QCOM_AOSS_QMP is compatible with QCOM_IPA, or it's not
defined.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Fixes: 34a081761e4e3 ("net: ipa: request IPA register values be retained")
Signed-off-by: Alex Elder <elder@linaro.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoatm: firestream: check the return value of ioremap() in fs_init()
Jia-Ju Bai [Fri, 25 Feb 2022 12:52:30 +0000 (04:52 -0800)]
atm: firestream: check the return value of ioremap() in fs_init()

The function ioremap() in fs_init() can fail, so its return value should
be checked.

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: sparx5: Add #include to remove warning
Casper Andersson [Fri, 25 Feb 2022 12:43:27 +0000 (13:43 +0100)]
net: sparx5: Add #include to remove warning

main.h uses NUM_TARGETS from main_regs.h, but
the missing include never causes any errors
because everywhere main.h is (currently)
included, main_regs.h is included before.
But since it is dependent on main_regs.h
it should always be included.

Signed-off-by: Casper Andersson <casper.casan@gmail.com>
Reviewed-by: Joacim Zetterling <joacim.zetterling@westermo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet/smc: Fix cleanup when register ULP fails
Tony Lu [Fri, 25 Feb 2022 06:56:57 +0000 (14:56 +0800)]
net/smc: Fix cleanup when register ULP fails

This patch calls smc_ib_unregister_client() when tcp_register_ulp()
fails, and make sure to clean it up.

Fixes: d7cd421da9da ("net/smc: Introduce TCP ULP support")
Signed-off-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipv6: ensure we call ipv6_mc_down() at most once
j.nixdorf@avm.de [Thu, 24 Feb 2022 09:06:49 +0000 (10:06 +0100)]
net: ipv6: ensure we call ipv6_mc_down() at most once

There are two reasons for addrconf_notify() to be called with NETDEV_DOWN:
either the network device is actually going down, or IPv6 was disabled
on the interface.

If either of them stays down while the other is toggled, we repeatedly
call the code for NETDEV_DOWN, including ipv6_mc_down(), while never
calling the corresponding ipv6_mc_up() in between. This will cause a
new entry in idev->mc_tomb to be allocated for each multicast group
the interface is subscribed to, which in turn leaks one struct ifmcaddr6
per nontrivial multicast group the interface is subscribed to.

The following reproducer will leak at least $n objects:

ip addr add ff2e::4242/32 dev eth0 autojoin
sysctl -w net.ipv6.conf.eth0.disable_ipv6=1
for i in $(seq 1 $n); do
ip link set up eth0; ip link set down eth0
done

Joining groups with IPV6_ADD_MEMBERSHIP (unprivileged) or setting the
sysctl net.ipv6.conf.eth0.forwarding to 1 (=> subscribing to ff02::2)
can also be used to create a nontrivial idev->mc_list, which will the
leak objects with the right up-down-sequence.

Based on both sources for NETDEV_DOWN events the interface IPv6 state
should be considered:

 - not ready if the network interface is not ready OR IPv6 is disabled
   for it
 - ready if the network interface is ready AND IPv6 is enabled for it

The functions ipv6_mc_up() and ipv6_down() should only be run when this
state changes.

Implement this by remembering when the IPv6 state is ready, and only
run ipv6_mc_down() if it actually changed from ready to not ready.

The other direction (not ready -> ready) already works correctly, as:

 - the interface notification triggered codepath for NETDEV_UP /
   NETDEV_CHANGE returns early if ipv6 is disabled, and
 - the disable_ipv6=0 triggered codepath skips fully initializing the
   interface as long as addrconf_link_ready(dev) returns false
 - calling ipv6_mc_up() repeatedly does not leak anything

Fixes: 3ce62a84d53c ("ipv6: exit early in addrconf_notify() if IPv6 is disabled")
Signed-off-by: Johannes Nixdorf <j.nixdorf@avm.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoefivars: Respect "block" flag in efivar_entry_set_safe()
Jann Horn [Fri, 18 Feb 2022 18:05:59 +0000 (19:05 +0100)]
efivars: Respect "block" flag in efivar_entry_set_safe()

When the "block" flag is false, the old code would sometimes still call
check_var_size(), which wrongly tells ->query_variable_store() that it can
block.

As far as I can tell, this can't really materialize as a bug at the moment,
because ->query_variable_store only does something on X86 with generic EFI,
and in that configuration we always take the efivar_entry_set_nonblocking()
path.

Fixes: ca0e30dcaa53 ("efi: Add nonblocking option to efi_query_variable_store()")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20220218180559.1432559-1-jannh@google.com
2 years agoriscv/efi_stub: Fix get_boot_hartid_from_fdt() return value
Sunil V L [Fri, 28 Jan 2022 04:50:04 +0000 (10:20 +0530)]
riscv/efi_stub: Fix get_boot_hartid_from_fdt() return value

The get_boot_hartid_from_fdt() function currently returns U32_MAX
for failure case which is not correct because U32_MAX is a valid
hartid value. This patch fixes the issue by returning error code.

Cc: <stable@vger.kernel.org>
Fixes: d7071743db31 ("RISC-V: Add EFI stub support.")
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2 years agoInput: samsung-keypad - properly state IOMEM dependency
David Gow [Mon, 28 Feb 2022 05:00:10 +0000 (21:00 -0800)]
Input: samsung-keypad - properly state IOMEM dependency

Make the samsung-keypad driver explicitly depend on CONFIG_HAS_IOMEM, as it
calls devm_ioremap(). This prevents compile errors in some configs (e.g,
allyesconfig/randconfig under UML):

/usr/bin/ld: drivers/input/keyboard/samsung-keypad.o: in function `samsung_keypad_probe':
samsung-keypad.c:(.text+0xc60): undefined reference to `devm_ioremap'

Signed-off-by: David Gow <davidgow@google.com>
Acked-by: anton ivanov <anton.ivanov@cambridgegreys.com>
Link: https://lore.kernel.org/r/20220225041727.1902850-1-davidgow@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2 years agoMerge tag 'exynos-drm-fixes-v5.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel...
Dave Airlie [Mon, 28 Feb 2022 04:05:39 +0000 (14:05 +1000)]
Merge tag 'exynos-drm-fixes-v5.17-rc6' of git://git./linux/kernel/git/daeinki/drm-exynos into drm-fixes

Fixups
- Make display controller drivers for Exynos series to use
  platform_get_irq and platform_get_irq_byname functions
  to get the interrupt, which prevents irq chaning from messed up
  when using hierarchical interrupt domains which use "interrupts"
  property in the node.
- Fix two regressions to TE-gpio handling.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Inki Dae <inki.dae@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220225014042.17637-1-inki.dae@samsung.com
2 years agoLinux 5.17-rc6
Linus Torvalds [Sun, 27 Feb 2022 22:36:33 +0000 (14:36 -0800)]
Linux 5.17-rc6

2 years agoMerge tag 'irq-urgent-2022-02-27' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 27 Feb 2022 21:07:40 +0000 (13:07 -0800)]
Merge tag 'irq-urgent-2022-02-27' of git://git./linux/kernel/git/tip/tip

Pull irq fix from Thomas Gleixner:
 "A single fix for a regression caused by the recent PCI/MSI rework
  which resulted in a recursive locking problem in the VMD driver.

  The cure is to cache the relevant information upfront instead of
  retrieving it at runtime"

* tag 'irq-urgent-2022-02-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  PCI: vmd: Prevent recursive locking on interrupt allocation

2 years agoMerge tag 'dma-mapping-5.17-1' of git://git.infradead.org/users/hch/dma-mapping
Linus Torvalds [Sun, 27 Feb 2022 20:42:37 +0000 (12:42 -0800)]
Merge tag 'dma-mapping-5.17-1' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fix from Christoph Hellwig:

 - fix a swiotlb info leak (Halil Pasic)

* tag 'dma-mapping-5.17-1' of git://git.infradead.org/users/hch/dma-mapping:
  swiotlb: fix info leak with DMA_FROM_DEVICE

2 years agoMerge tag 'pinctrl-v5-17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Sun, 27 Feb 2022 20:30:54 +0000 (12:30 -0800)]
Merge tag 'pinctrl-v5-17-3' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pin control fixes from Linus Walleij:

 - Fix some drive strength and pull-up code in the K210 driver.

 - Add the Alder Lake-M ACPI ID so it starts to work properly.

 - Use a static name for the StarFive GPIO irq_chip, forestalling an
   upcoming fixes series from Marc Zyngier.

 - Fix an ages old bug in the Tegra 186 driver where we were indexing at
   random into struct and being lucky getting the right member.

* tag 'pinctrl-v5-17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  gpio: tegra186: Fix chip_data type confusion
  pinctrl: starfive: Use a static name for the GPIO irq_chip
  pinctrl: tigerlake: Revert "Add Alder Lake-M ACPI ID"
  pinctrl: k210: Fix bias-pull-up
  pinctrl: fix loop in k210_pinconf_get_drive()

2 years agoMerge tag 'trace-v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Sat, 26 Feb 2022 20:10:17 +0000 (12:10 -0800)]
Merge tag 'trace-v5.17-rc4' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:

 - rtla (Real-Time Linux Analysis tool):
    - fix typo in man page
    - Update API -e to -E before it is released
    - Error message fix and memory leak fix

 - Partially uninline trace event soft disable to shrink text

 - Fix function graph start up test

 - Have triggers affect the trace instance they are in and not top level

 - Have osnoise sleep in the units it says it uses

 - Remove unused ftrace stub function

 - Remove event probe redundant info from event in the buffer

 - Fix group ownership setting in tracefs

 - Ensure trace buffer is minimum size to prevent crashes

* tag 'trace-v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  rtla/osnoise: Fix error message when failing to enable trace instance
  rtla/osnoise: Free params at the exit
  rtla/hist: Make -E the short version of --entries
  tracing: Fix selftest config check for function graph start up test
  tracefs: Set the group ownership in apply_options() not parse_options()
  tracing/osnoise: Make osnoise_main to sleep for microseconds
  ftrace: Remove unused ftrace_startup_enable() stub
  tracing: Ensure trace buffer is at least 4096 bytes large
  tracing: Uninline trace_trigger_soft_disabled() partly
  eprobes: Remove redundant event type information
  tracing: Have traceon and traceoff trigger honor the instance
  tracing: Dump stacktrace trigger to the corresponding instance
  rtla: Fix systme -> system typo on man page

2 years agoMerge tag 'fixes-2022-02-26' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt...
Linus Torvalds [Sat, 26 Feb 2022 20:00:44 +0000 (12:00 -0800)]
Merge tag 'fixes-2022-02-26' of git://git./linux/kernel/git/rppt/memblock

Pull memblock fix from Mike Rapoport:
 "Use kfree() to release kmalloced memblock regions

  memblock.{reserved,memory}.regions may be allocated using kmalloc()
  in memblock_double_array(). Use kfree() to release these kmalloced
  regions"

* tag 'fixes-2022-02-26' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
  memblock: use kfree() to release kmalloced memblock regions

2 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 26 Feb 2022 19:52:14 +0000 (11:52 -0800)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "12 patches.

  Subsystems affected by this patch series: MAINTAINERS, mailmap, memfd,
  and mm (hugetlb, kasan, hugetlbfs, pagemap, selftests, memcg, and
  slab)"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  selftests/memfd: clean up mapping in mfd_fail_write
  mailmap: update Roman Gushchin's email
  MAINTAINERS, SLAB: add Roman as reviewer, git tree
  MAINTAINERS: add Shakeel as a memcg co-maintainer
  MAINTAINERS: remove Vladimir from memcg maintainers
  MAINTAINERS: add Roman as a memcg co-maintainer
  selftest/vm: fix map_fixed_noreplace test failure
  mm: fix use-after-free bug when mm->mmap is reused after being freed
  hugetlbfs: fix a truncation issue in hugepages parameter
  kasan: test: prevent cache merging in kmem_cache_double_destroy
  mm/hugetlb: fix kernel crash with hugetlb mremap
  MAINTAINERS: add sysctl-next git tree

2 years agoMerge tag 'riscv-for-linus-5.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 26 Feb 2022 18:26:24 +0000 (10:26 -0800)]
Merge tag 'riscv-for-linus-5.17-rc6' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:

 - A fix for the K210 sdcard defconfig, to avoid using a
   fixed delay for the root FS

 - A fix to make sure there's a proper call frame for
   trace_hardirqs_{on,off}().

* tag 'riscv-for-linus-5.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: fix oops caused by irqsoff latency tracer
  riscv: fix nommu_k210_sdcard_defconfig

2 years agoMerge tag 'xfs-5.17-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Linus Torvalds [Sat, 26 Feb 2022 17:53:19 +0000 (09:53 -0800)]
Merge tag 'xfs-5.17-fixes-2' of git://git./fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:
 "Nothing exciting, just more fixes for not returning sync_filesystem
  error values (and eliding it when it's not necessary).

  Summary:

   - Only call sync_filesystem when we're remounting the filesystem
     readonly readonly, and actually check its return value"

* tag 'xfs-5.17-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: only bother with sync_filesystem during readonly remount

2 years agoselftests/memfd: clean up mapping in mfd_fail_write
Mike Kravetz [Sat, 26 Feb 2022 03:11:26 +0000 (19:11 -0800)]
selftests/memfd: clean up mapping in mfd_fail_write

Running the memfd script ./run_hugetlbfs_test.sh will often end in error
as follows:

    memfd-hugetlb: CREATE
    memfd-hugetlb: BASIC
    memfd-hugetlb: SEAL-WRITE
    memfd-hugetlb: SEAL-FUTURE-WRITE
    memfd-hugetlb: SEAL-SHRINK
    fallocate(ALLOC) failed: No space left on device
    ./run_hugetlbfs_test.sh: line 60: 166855 Aborted                 (core dumped) ./memfd_test hugetlbfs
    opening: ./mnt/memfd
    fuse: DONE

If no hugetlb pages have been preallocated, run_hugetlbfs_test.sh will
allocate 'just enough' pages to run the test.  In the SEAL-FUTURE-WRITE
test the mfd_fail_write routine maps the file, but does not unmap.  As a
result, two hugetlb pages remain reserved for the mapping.  When the
fallocate call in the SEAL-SHRINK test attempts allocate all hugetlb
pages, it is short by the two reserved pages.

Fix by making sure to unmap in mfd_fail_write.

Link: https://lkml.kernel.org/r/20220219004340.56478-1-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomailmap: update Roman Gushchin's email
Roman Gushchin [Sat, 26 Feb 2022 03:11:23 +0000 (19:11 -0800)]
mailmap: update Roman Gushchin's email

I'm moving to a @linux.dev account. Map my old addresses.

Link: https://lkml.kernel.org/r/20220221200006.416377-1-roman.gushchin@linux.dev
Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS, SLAB: add Roman as reviewer, git tree
Vlastimil Babka [Sat, 26 Feb 2022 03:11:20 +0000 (19:11 -0800)]
MAINTAINERS, SLAB: add Roman as reviewer, git tree

The slab code has an overlap with kmem accounting, where Roman has done
a lot of work recently and it would be useful to make sure he's CC'd on
patches that potentially affect it.  Thus add him as a reviewer for the
SLAB subsystem.

Also while at it, add the link to slab git tree.

Link: https://lkml.kernel.org/r/20220222103104.13241-1-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: add Shakeel as a memcg co-maintainer
Shakeel Butt [Sat, 26 Feb 2022 03:11:17 +0000 (19:11 -0800)]
MAINTAINERS: add Shakeel as a memcg co-maintainer

I have been contributing and reviewing to the memcg codebase for last
couple of years.  So, making it official.

Link: https://lkml.kernel.org/r/20220224060148.4092228-1-shakeelb@google.com
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: remove Vladimir from memcg maintainers
Vladimir Davydov [Sat, 26 Feb 2022 03:11:14 +0000 (19:11 -0800)]
MAINTAINERS: remove Vladimir from memcg maintainers

Link: https://lkml.kernel.org/r/4ad1f8da49d7b71c84a0c15bd5347f5ce704e730.1645608825.git.vdavydov.dev@gmail.com
Signed-off-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: add Roman as a memcg co-maintainer
Roman Gushchin [Sat, 26 Feb 2022 03:11:11 +0000 (19:11 -0800)]
MAINTAINERS: add Roman as a memcg co-maintainer

Add myself as a memcg co-maintainer.  My primary focus over last few
years was the kernel memory accounting stack, but I do work on some
other parts of the memory controller as well.

Link: https://lkml.kernel.org/r/20220221233951.659048-1-roman.gushchin@linux.dev
Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoselftest/vm: fix map_fixed_noreplace test failure
Aneesh Kumar K.V [Sat, 26 Feb 2022 03:11:08 +0000 (19:11 -0800)]
selftest/vm: fix map_fixed_noreplace test failure

On the latest RHEL the test fails due to executable mapped at 256MB
address

     # ./map_fixed_noreplace
    mmap() @ 0x10000000-0x10050000 p=0xffffffffffffffff result=File exists
    10000000-10010000 r-xp 00000000 fd:04 34905657                           /root/rpmbuild/BUILD/kernel-5.14.0-56.el9/linux-5.14.0-56.el9.ppc64le/tools/testing/selftests/vm/map_fixed_noreplace
    10010000-10020000 r--p 00000000 fd:04 34905657                           /root/rpmbuild/BUILD/kernel-5.14.0-56.el9/linux-5.14.0-56.el9.ppc64le/tools/testing/selftests/vm/map_fixed_noreplace
    10020000-10030000 rw-p 00010000 fd:04 34905657                           /root/rpmbuild/BUILD/kernel-5.14.0-56.el9/linux-5.14.0-56.el9.ppc64le/tools/testing/selftests/vm/map_fixed_noreplace
    10029b90000-10029bc0000 rw-p 00000000 00:00 0                            [heap]
    7fffbb510000-7fffbb750000 r-xp 00000000 fd:04 24534                      /usr/lib64/libc.so.6
    7fffbb750000-7fffbb760000 r--p 00230000 fd:04 24534                      /usr/lib64/libc.so.6
    7fffbb760000-7fffbb770000 rw-p 00240000 fd:04 24534                      /usr/lib64/libc.so.6
    7fffbb780000-7fffbb7a0000 r--p 00000000 00:00 0                          [vvar]
    7fffbb7a0000-7fffbb7b0000 r-xp 00000000 00:00 0                          [vdso]
    7fffbb7b0000-7fffbb800000 r-xp 00000000 fd:04 24514                      /usr/lib64/ld64.so.2
    7fffbb800000-7fffbb810000 r--p 00040000 fd:04 24514                      /usr/lib64/ld64.so.2
    7fffbb810000-7fffbb820000 rw-p 00050000 fd:04 24514                      /usr/lib64/ld64.so.2
    7fffd93f0000-7fffd9420000 rw-p 00000000 00:00 0                          [stack]
    Error: couldn't map the space we need for the test

Fix this by finding a free address using mmap instead of hardcoding
BASE_ADDRESS.

Link: https://lkml.kernel.org/r/20220217083417.373823-1-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Jann Horn <jannh@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm: fix use-after-free bug when mm->mmap is reused after being freed
Suren Baghdasaryan [Sat, 26 Feb 2022 03:11:05 +0000 (19:11 -0800)]
mm: fix use-after-free bug when mm->mmap is reused after being freed

oom reaping (__oom_reap_task_mm) relies on a 2 way synchronization with
exit_mmap.  First it relies on the mmap_lock to exclude from unlock
path[1], page tables tear down (free_pgtables) and vma destruction.
This alone is not sufficient because mm->mmap is never reset.

For historical reasons[2] the lock is taken there is also MMF_OOM_SKIP
set for oom victims before.

The oom reaper only ever looks at oom victims so the whole scheme works
properly but process_mrelease can opearate on any task (with fatal
signals pending) which doesn't really imply oom victims.  That means
that the MMF_OOM_SKIP part of the synchronization doesn't work and it
can see a task after the whole address space has been demolished and
traverse an already released mm->mmap list.  This leads to use after
free as properly caught up by KASAN report.

Fix the issue by reseting mm->mmap so that MMF_OOM_SKIP synchronization
is not needed anymore.  The MMF_OOM_SKIP is not removed from exit_mmap
yet but it acts mostly as an optimization now.

[1] 27ae357fa82b ("mm, oom: fix concurrent munlock and oom reaper unmap, v3")
[2] 212925802454 ("mm: oom: let oom_reap_task and exit_mmap run concurrently")

[mhocko@suse.com: changelog rewrite]

Link: https://lore.kernel.org/all/00000000000072ef2c05d7f81950@google.com/
Link: https://lkml.kernel.org/r/20220215201922.1908156-1-surenb@google.com
Fixes: 64591e8605d6 ("mm: protect free_pgtables with mmap_lock write lock in exit_mmap")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reported-by: syzbot+2ccf63a4bd07cf39cab0@syzkaller.appspotmail.com
Suggested-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Rik van Riel <riel@surriel.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: Jan Engelhardt <jengelh@inai.de>
Cc: Tim Murray <timmurray@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agohugetlbfs: fix a truncation issue in hugepages parameter
Liu Yuntao [Sat, 26 Feb 2022 03:11:02 +0000 (19:11 -0800)]
hugetlbfs: fix a truncation issue in hugepages parameter

When we specify a large number for node in hugepages parameter, it may
be parsed to another number due to truncation in this statement:

node = tmp;

For example, add following parameter in command line:

hugepagesz=1G hugepages=4294967297:5

and kernel will allocate 5 hugepages for node 1 instead of ignoring it.

I move the validation check earlier to fix this issue, and slightly
simplifies the condition here.

Link: https://lkml.kernel.org/r/20220209134018.8242-1-liuyuntao10@huawei.com
Fixes: b5389086ad7be0 ("hugetlbfs: extend the definition of hugepages parameter to support node allocation")
Signed-off-by: Liu Yuntao <liuyuntao10@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agokasan: test: prevent cache merging in kmem_cache_double_destroy
Andrey Konovalov [Sat, 26 Feb 2022 03:10:59 +0000 (19:10 -0800)]
kasan: test: prevent cache merging in kmem_cache_double_destroy

With HW_TAGS KASAN and kasan.stacktrace=off, the cache created in the
kmem_cache_double_destroy() test might get merged with an existing one.
Thus, the first kmem_cache_destroy() call won't actually destroy it but
will only decrease the refcount.  This causes the test to fail.

Provide an empty constructor for the created cache to prevent the cache
from getting merged.

Link: https://lkml.kernel.org/r/b597bd434c49591d8af00ee3993a42c609dc9a59.1644346040.git.andreyknvl@google.com
Fixes: f98f966cd750 ("kasan: test: add test case for double-kmem_cache_destroy()")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm/hugetlb: fix kernel crash with hugetlb mremap
Aneesh Kumar K.V [Sat, 26 Feb 2022 03:10:56 +0000 (19:10 -0800)]
mm/hugetlb: fix kernel crash with hugetlb mremap

This fixes the below crash:

  kernel BUG at include/linux/mm.h:2373!
  cpu 0x5d: Vector: 700 (Program Check) at [c00000003c6e76e0]
      pc: c000000000581a54: pmd_to_page+0x54/0x80
      lr: c00000000058d184: move_hugetlb_page_tables+0x4e4/0x5b0
      sp: c00000003c6e7980
     msr: 9000000000029033
    current = 0xc00000003bd8d980
    paca    = 0xc000200fff610100   irqmask: 0x03   irq_happened: 0x01
      pid   = 9349, comm = hugepage-mremap
  kernel BUG at include/linux/mm.h:2373!
    move_hugetlb_page_tables+0x4e4/0x5b0 (link register)
    move_hugetlb_page_tables+0x22c/0x5b0 (unreliable)
    move_page_tables+0xdbc/0x1010
    move_vma+0x254/0x5f0
    sys_mremap+0x7c0/0x900
    system_call_exception+0x160/0x2c0

the kernel can't use huge_pte_offset before it set the pte entry because
a page table lookup check for huge PTE bit in the page table to
differentiate between a huge pte entry and a pointer to pte page.  A
huge_pte_alloc won't mark the page table entry huge and hence kernel
should not use huge_pte_offset after a huge_pte_alloc.

Link: https://lkml.kernel.org/r/20220211063221.99293-1-aneesh.kumar@linux.ibm.com
Fixes: 550a7d60bd5e ("mm, hugepages: add mremap() support for hugepage backed vma")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Mina Almasry <almasrymina@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: add sysctl-next git tree
Luis Chamberlain [Sat, 26 Feb 2022 03:10:53 +0000 (19:10 -0800)]
MAINTAINERS: add sysctl-next git tree

Add a git tree for sysctls as there's been quite a bit of work lately to
remove all the syctls out of kernel/sysctl.c and move to their respective
places, so coordination has been needed to avoid conflicts.  This tree
will also help soak these changes on linux-next prior to getting to Linus.

Link: https://lkml.kernel.org/r/20220218182736.3694508-1-mcgrof@kernel.org
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Iurii Zaikin <yzaikin@google.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue
David S. Miller [Sat, 26 Feb 2022 12:50:20 +0000 (12:50 +0000)]
Merge branch '40GbE' of git://git./linux/kernel/git/tnguy/net-queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2022-02-25

This series contains updates to iavf driver only.

Slawomir fixes stability issues that can be seen when stressing the
driver using a large number of VFs with a multitude of operations.
Among the fixes are reworking mutexes to provide more effective locking,
ensuring initialization is complete before teardown, preventing
operations which could race while removing the driver, stopping certain
tasks from being queued when the device is down, and adding a missing
mutex unlock.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agortla/osnoise: Fix error message when failing to enable trace instance
Daniel Bristot de Oliveira [Fri, 18 Feb 2022 17:57:09 +0000 (18:57 +0100)]
rtla/osnoise: Fix error message when failing to enable trace instance

When a trace instance creation fails, tools are printing:

Could not enable -> osnoiser <- tracer for tracing

Print the actual (and correct) name of the tracer it fails to enable.

Link: https://lkml.kernel.org/r/53ef0582605af91eca14b19dba9fc9febb95d4f9.1645206561.git.bristot@kernel.org
Fixes: b1696371d865 ("rtla: Helper functions for rtla")
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agortla/osnoise: Free params at the exit
Daniel Bristot de Oliveira [Fri, 18 Feb 2022 17:57:08 +0000 (18:57 +0100)]
rtla/osnoise: Free params at the exit

The variable that stores the parsed command line arguments are not
being free()d at the rtla osnoise top exit path.

Free params variable before exiting.

Link: https://lkml.kernel.org/r/0be31d8259c7c53b98a39769d60cfeecd8421785.1645206561.git.bristot@kernel.org
Fixes: 1eceb2fc2ca5 ("rtla/osnoise: Add osnoise top mode")
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agortla/hist: Make -E the short version of --entries
Daniel Bristot de Oliveira [Fri, 18 Feb 2022 17:57:07 +0000 (18:57 +0100)]
rtla/hist: Make -E the short version of --entries

Currently, --entries uses -e as the short version in the hist mode of
timerlat and osnoise tools. But as -e is already used to enable events
on trace sessions by other tools, thus let's keep it available for the
same usage for all rtla tools.

Make -E the short version of --entries for hist mode on all tools.

Note: rtla was merged in this merge window, so rtla was not released yet.

Link: https://lkml.kernel.org/r/5dbf0cbe7364d3a05e708926b41a097c59a02b1e.1645206561.git.bristot@kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agotracing: Fix selftest config check for function graph start up test
Christophe Leroy [Mon, 20 Dec 2021 16:38:06 +0000 (16:38 +0000)]
tracing: Fix selftest config check for function graph start up test

CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS is required to test
direct tramp.

Link: https://lkml.kernel.org/r/bdc7e594e13b0891c1d61bc8d56c94b1890eaed7.1640017960.git.christophe.leroy@csgroup.eu
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agotracefs: Set the group ownership in apply_options() not parse_options()
Steven Rostedt (Google) [Fri, 25 Feb 2022 20:34:26 +0000 (15:34 -0500)]
tracefs: Set the group ownership in apply_options() not parse_options()

Al Viro brought it to my attention that the dentries may not be filled
when the parse_options() is called, causing the call to set_gid() to
possibly crash. It should only be called if parse_options() succeeds
totally anyway.

He suggested the logical place to do the update is in apply_options().

Link: https://lore.kernel.org/all/20220225165219.737025658@goodmis.org/
Link: https://lkml.kernel.org/r/20220225153426.1c4cab6b@gandalf.local.home
Cc: stable@vger.kernel.org
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Fixes: 48b27b6b5191 ("tracefs: Set all files to the same group ownership as the mount option")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agoMerge tag 'linux-can-fixes-for-5.17-20220225' of git://git.kernel.org/pub/scm/linux...
Jakub Kicinski [Fri, 25 Feb 2022 22:53:58 +0000 (14:53 -0800)]
Merge tag 'linux-can-fixes-for-5.17-20220225' of git://git./linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2022-02-25

The first 2 patches are by Vincent Mailhol and fix the error handling
of the ndo_open callbacks of the etas_es58x and the gs_usb CAN USB
drivers.

The last patch is by Lad Prabhakar and fixes a small race condition in
the rcar_canfd's rcar_canfd_channel_probe() function.

* tag 'linux-can-fixes-for-5.17-20220225' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can:
  can: rcar_canfd: rcar_canfd_channel_probe(): register the CAN device when fully ready
  can: gs_usb: change active_channels's type from atomic_t to u8
  can: etas_es58x: change opened_channel_cnt's type from atomic_t to u8
====================

Link: https://lore.kernel.org/r/20220225165622.3231809-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge tag 'configfs-5.17-2022-02-25' of git://git.infradead.org/users/hch/configfs
Linus Torvalds [Fri, 25 Feb 2022 22:12:36 +0000 (14:12 -0800)]
Merge tag 'configfs-5.17-2022-02-25' of git://git.infradead.org/users/hch/configfs

Pull configfs fix from Christoph Hellwig:

 - fix a race in configfs_{,un}register_subsystem (ChenXiaoSong)

* tag 'configfs-5.17-2022-02-25' of git://git.infradead.org/users/hch/configfs:
  configfs: fix a race in configfs_{,un}register_subsystem()

2 years agoMerge tag 'for-5.17-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
Linus Torvalds [Fri, 25 Feb 2022 22:08:03 +0000 (14:08 -0800)]
Merge tag 'for-5.17-rc5-tag' of git://git./linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "This is a hopefully last batch of fixes for defrag that got broken in
  5.16, all stable material.

  The remaining reported problem is excessive IO with autodefrag due to
  various conditions in the defrag code not met or missing"

* tag 'for-5.17-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: reduce extent threshold for autodefrag
  btrfs: autodefrag: only scan one inode once
  btrfs: defrag: don't use merged extent map for their generation check
  btrfs: defrag: bring back the old file extent search behavior
  btrfs: defrag: remove an ambiguous condition for rejection
  btrfs: defrag: don't defrag extents which are already at max capacity
  btrfs: defrag: don't try to merge regular extents with preallocated extents
  btrfs: defrag: allow defrag_one_cluster() to skip large extent which is not a target
  btrfs: prevent copying too big compressed lzo segment