Keith Busch [Thu, 21 May 2026 19:02:53 +0000 (12:02 -0700)]
blk-mq: pop cached request if it is usable
When submitting a bio to blk-mq, if the task should sleep after peeking
a cached request, but before it pops it, the plug flushes and calls
blk_mq_free_plug_rqs, freeing the cached_rqs. This creates a
use-after-free bug. Fix this by popping the cached request before any
possible blocking calls if it is suitable for use.
Popping this request first holds a queue reference, so avoid any
serialization races with queue freezes and can safely proceed with
dispatching that request to the driver. This potentially increases a
timing window from when a driver wants to freeze its queue to when
requests stop being dispatched. That scenario is off the fast path
though, and drivers need to appropriately handle requests during a
freeze request anyway.
The downside is the popped element needs to be individually freed when
we performed a bio plug merge. The cached request would have had to be
freed later anyway, but this patch does it inline with building the plug
list instead of after flushing it.
Fixes:
b0077e269f6c1 ("blk-mq: make sure active queue usage is held for bio_integrity_prep()")
Fixes:
7b4f36cd22a65 ("block: ensure we hold a queue reference when using queue limits")
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://patch.msgid.link/20260521190253.242065-1-kbusch@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Thu, 21 May 2026 15:12:40 +0000 (09:12 -0600)]
Merge tag 'nvme-7.1-2026-05-21' of git://git.infradead.org/nvme into block-7.1
Pull NVMe fixes from Keith:
"- Fix memory leak for peer-to-peer addresses
- Fix dma map leaks on resource errors"
* tag 'nvme-7.1-2026-05-21' of git://git.infradead.org/nvme:
nvme-pci: fix dma mapping leak on data setup error
nvme-pci: fix dma_vecs leak on p2p memory
Keith Busch [Tue, 19 May 2026 20:01:57 +0000 (13:01 -0700)]
nvme-pci: fix dma mapping leak on data setup error
We're leaking the initial DMA mapping during iteration if we fail to
allocate the tracking descriptor for both PRP and SGL. Unmap the
iterator directly; we can't use the existing unmap helper because it
depends on the tracking descriptor being successfully allocated, so a
new one for an in-use iterator is provided.
The mappings were also leaking when the driver detects an invalid
bio_vec when mapping PRPs, so fix that too.
Fixes:
b8b7570a7ec87 ("nvme-pci: fix dma unmapping when using PRPs and not using the IOVA mapping")
Fixes:
7ce3c1dd78fca ("nvme-pci: convert the data mapping to blk_rq_dma_map")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Keith Busch [Wed, 20 May 2026 01:03:44 +0000 (18:03 -0700)]
nvme-pci: fix dma_vecs leak on p2p memory
We don't unmap P2P memory, so we don't need to track it. The dma_vec
allocation was getting leaked on the completion.
Fixes:
b8b7570a7ec87 ("nvme-pci: fix dma unmapping when using PRPs and not using the IOVA mapping")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Caleb Sander Mateos [Wed, 13 May 2026 18:29:21 +0000 (12:29 -0600)]
bio-integrity-fs: pass data iter to bio_integrity_verify()
bio_integrity_verify() expects the passed struct bvec_iter to be an
iterator over bio data, not integrity. So construct a separate data
bvec_iter without the bio_integrity_bytes() conversion and pass it to
bio_integrity_verify() instead of bip_iter.
Fixes:
0bde8a12b554 ("block: add fs_bio_integrity helpers")
Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260513182924.1753582-1-csander@purestorage.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Fri, 15 May 2026 01:14:33 +0000 (19:14 -0600)]
Merge tag 'nvme-7.1-2026-05-14' of git://git.infradead.org/nvme into block-7.1
Pull NVMe fixes from Keith:
"- Fix memory leak on a passthrough integrity mapping failure (Keith)
- Hide secrets behind debug option (Hannes)
- Fix pci use-after-free for host memory buffer (Chia-Lin Kao)
- Fix tcp taregt use-after-free for data digest (Sagi)
- Revert a mistaken quirk (Alan Cui)
- Fix uevent and controller state race condition (Maurizio)
- Fix apple submission queue re-initialization (Nick Chan)"
* tag 'nvme-7.1-2026-05-14' of git://git.infradead.org/nvme:
nvme-apple: Reset q->sq_tail during queue init
nvme: fix race condition between connected uevent and STARTED_ONCE flag
Revert "nvme: add quirk NVME_QUIRK_IGNORE_DEV_SUBNQN for 144d:a808"
nvmet-tcp: Fix potential UAF when ddgst mismatch
nvme-pci: fix use-after-free in nvme_free_host_mem()
nvmet-auth: Do not print DH-HMAC-CHAP secrets
nvme: fix bio leak on mapping failure
nvme: make prp passthrough usage less scary
Nick Chan [Thu, 14 May 2026 13:16:01 +0000 (21:16 +0800)]
nvme-apple: Reset q->sq_tail during queue init
Fixes a "duplicate tag error for tag 0" firmware crash during controller
reset while setting up a queue on Apple A11 / T8015 caused by stale
entries in the submission queue due to an invalid sq_tail offset after
reset.
Fixes:
04d8ecf37b5e ("nvme: apple: Add Apple A11 support")
Cc: stable@vger.kernel.org
Suggested-by: Yuriy Havrylyuk <yhavry@gmail.com>
Reviewed-by: Sven Peter <sven@kernel.org>
Signed-off-by: Nick Chan <towinchenmi@gmail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Christoph Hellwig [Thu, 7 May 2026 05:01:48 +0000 (07:01 +0200)]
block: align down bounces bios
Just like for the extract user pages path, we need to align down the
size to the supported boundary.
Fixes:
8dd5e7c75d7b ("block: add helpers to bounce buffer an iov_iter into bios")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Link: https://patch.msgid.link/20260507050153.1298375-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Christoph Hellwig [Thu, 7 May 2026 05:01:47 +0000 (07:01 +0200)]
block: pass a minsize argument to bio_iov_iter_bounce
When bouncing for block size > PAGE_SIZE file systems that require
file system block size alignment (e.g. zoned XFS), the bio needs to
be big enough to fit an entire block.
Fixes:
8dd5e7c75d7b ("block: add helpers to bounce buffer an iov_iter into bios")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Link: https://patch.msgid.link/20260507050153.1298375-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Ming Lei [Wed, 13 May 2026 10:19:40 +0000 (18:19 +0800)]
selftests: ublk: cap nthreads to kernel's actual nr_hw_queues
dev->nthreads is derived from the user-requested queue count before the
ADD command, but the kernel may reduce nr_hw_queues (capped to
nr_cpu_ids). When the VM has fewer CPUs than requested queues, the
daemon creates more handler threads than there are kernel queues.
In non-batch mode, the extra threads access uninitialized queues
(q_depth=0), submit zero io_uring SQEs, and block forever in
io_cqring_wait. In batch mode, the extra threads cause similar hangs
during device removal.
In both cases, the stuck threads prevent the daemon from closing the
char device, holding the last ublk_device reference and causing
ublk_ctrl_del_dev() to hang in wait_event_interruptible().
Fix by capping dev->nthreads to the kernel-returned nr_hw_queues after
the ADD command completes. per_io_tasks mode is excluded because threads
interleave across all queues, so nthreads > nr_hw_queues is valid.
Fixes:
abe54c160346 ("selftests: ublk: kublk: decouple ublk_queues from ublk server threads")
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Link: https://patch.msgid.link/20260513101941.1373998-1-tom.leiming@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Damien Le Moal [Wed, 13 May 2026 11:11:29 +0000 (20:11 +0900)]
block: fix handling of dead zone write plugs
Shin'ichiro reported hard to reproduce unaligned write errors with zoned
block devices. Under normal operation conditions (e.g. running XFS on an
SMR disk), these errors are nearly impossible to trigger. But using a
"slow" kernel with many debug options enables and some specific use
cases (e.g. fio zbd test case 46), the errors can be reproduced fairly
easily.
The unaligned write errors come from mishandling a valid reference
counting pattern of zone write plugs. Such pattern triggers for instance
if a process A writes a zone (not necessarilly to the full state),
another process B immediately resets the zone and immediately following
the completion of the zone reset, starts issuing writes to the zone.
With such pattern, in some cases, the zone write plugs worker thread of
the device may still be holding a reference to the zone write plug of
the zone taken when process A was writing to the zone. The following
zone reset from process B marks the zone as dead but does not remove the
zone write plug from the device hash table as a reference to the plug
still exist. Once process B starts issuing new writes, the zone write
plug is seen as dead and the writes from process B are immediately
failed, despite this write pattern being perfectly legal.
Fix this by allowing restoring a dead zone write plug to a live state if
a write is issued to the zone when the zone is: marked as dead, empty
and the write sector corresponds to the first sector of the zone (that
is, the write is aligned to the zone write pointer). This is done with
the new helper function disk_check_zone_wplug_dead(), which restores a
dead zone write plug to a live state by clearing the BLK_ZONE_WPLUG_DEAD
flag and restoring the initial reference to the zone write plug taken
when the plug was added to the device hash table.
Reported-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Fixes:
b7d4ffb51037 ("block: fix zone write plug removal")
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Tested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Link: https://patch.msgid.link/20260513111129.108809-1-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Sungwoo Kim [Tue, 12 May 2026 05:09:29 +0000 (01:09 -0400)]
block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()
pin_user_pages_fast() can partially succeed and return the number of
pages that were actually pinned. However, the bio_integrity_map_user()
does not handle this partial pinning. This leads to a general protection
fault since bvec_from_pages() dereferences an unpinned page address,
which is 0.
To fix this, add a check to verify that all requested memory is pinned.
If partial pinning occurs, unpin the memory and return -EFAULT.
Kernel Oops:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 1061 Comm: nvme-passthroug Not tainted
7.0.0-11783-g90957f9314e8-dirty #16 PREEMPT(lazy)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014
RIP: 0010:bio_integrity_map_user.cold+0x1b0/0x9d6
Fixes:
492c5d455969 ("block: bio-integrity: directly map user buffers")
Acked-by: Chao Shi <cshi008@fiu.edu>
Acked-by: Weidong Zhu <weizhu@fiu.edu>
Acked-by: Dave Tian <daveti@purdue.edu>
Signed-off-by: Sungwoo Kim <iam@sung-woo.kim>
Tested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Link: https://github.com/linux-blktests/blktests/pull/244
Link: https://patch.msgid.link/20260512050929.541397-2-iam@sung-woo.kim
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Casey Chen [Mon, 11 May 2026 21:22:30 +0000 (15:22 -0600)]
block: recompute nr_integrity_segments in blk_insert_cloned_request
blk_insert_cloned_request() already recomputes nr_phys_segments
against the bottom queue, because "the queue settings related to
segment counting may differ from the original queue." The exact same
reasoning applies to integrity segments: a stacked driver's underlying
queue can have tighter virt_boundary_mask, seg_boundary_mask, or
max_segment_size than the top queue, in which case
blk_rq_count_integrity_sg() against the bottom queue produces a
different count than the cached rq->nr_integrity_segments inherited
from the source request by blk_rq_prep_clone().
When the cached count is lower than the bottom queue's actual count,
blk_rq_map_integrity_sg() trips
BUG_ON(segments > rq->nr_integrity_segments);
on dispatch. The same families of stacked setups that motivated the
existing nr_phys_segments recompute -- dm-multipath fanning out to
nvme-rdma in particular -- can produce this.
Mirror the nr_phys_segments handling: when the request carries
integrity, recompute nr_integrity_segments against the bottom queue
and reject the request if it exceeds the bottom queue's
max_integrity_segments. blk_rq_count_integrity_sg() and
queue_max_integrity_segments() are both already available via
<linux/blk-integrity.h>, which blk-mq.c includes.
This closes a latent gap in the stacking contract and brings the
integrity-segment accounting in line with the existing
phys-segment accounting.
Fixes:
76c313f658d2 ("blk-integrity: improved sg segment mapping")
Signed-off-by: Casey Chen <cachen@purestorage.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260511212230.27511-1-cachen@purestorage.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
David Carlier [Mon, 11 May 2026 21:51:51 +0000 (22:51 +0100)]
block: don't overwrite bip_vcnt in bio_integrity_copy_user()
bio_integrity_add_page() already sets bip_vcnt to 1 for the bounce
segment. Overwriting it with nr_vecs breaks bip_vcnt <= bip_max_vcnt
on WRITE (bip_max_vcnt is 1), so the gap-merge checks in block/blk.h
read past the bip_vec[] flex array. On READ the read is in bounds
but lands on a saved user bvec instead of the bounce.
The line was added for split propagation, but bio_integrity_clone()
doesn't copy bip_vcnt and BIP_CLONE_FLAGS excludes BIP_COPY_USER.
Fixes:
3991657ae707 ("block: set bip_vcnt correctly")
Signed-off-by: David Carlier <devnexen@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260511215151.346228-1-devnexen@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Maurizio Lombardi [Fri, 8 May 2026 13:33:29 +0000 (15:33 +0200)]
nvme: fix race condition between connected uevent and STARTED_ONCE flag
When a controller connects, nvme_start_ctrl() emits the
"NVME_EVENT=connected" uevent and sets the NVME_CTRL_STARTED_ONCE flag.
Currently, the uevent is emitted before the flag is set. This creates a
race condition for userspace tools (like udev rules) that might rely on
the "connected" event to configure other attributes.
Swap the order of operations in nvme_start_ctrl() so that the
NVME_CTRL_STARTED_ONCE flag is set before the uevent is sent. This
guarantees that the admin_timeout can already be changed when userspace
is notified.
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
AlanCui4080 [Fri, 8 May 2026 09:59:12 +0000 (17:59 +0800)]
Revert "nvme: add quirk NVME_QUIRK_IGNORE_DEV_SUBNQN for 144d:a808"
This reverts commit
7f991e3f9b8f044640bcb5fa8570350a68932843 ("nvme: add quirk
NVME_QUIRK_IGNORE_DEV_SUBNQN for 144d:a808")
The incorrect implementations of SUBNQN is a known issue in a massive number of
NVMe units. However, the warning "nvme nvmex: missing or invalid SUBNQN field."
is usually appropriate and will not affect performance or behavior etc. That is
because the support for SUBNQN is mandatory if the controller supports NVMe
revision 1.2.1 or greater, and it reported itself without a SUBNQN field which
breaks compliance with the specification. It should be not quirked by the Linux
Kernel.
Signed-off-by: Alan Cui <me@alancui.cc>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Sagi Grimberg [Sun, 10 May 2026 20:30:29 +0000 (23:30 +0300)]
nvmet-tcp: Fix potential UAF when ddgst mismatch
Shivam Kumar found via vulnerability testing:
When data digest is enabled on an NVMe/TCP connection and a digest
mismatch occurs on a non-final H2C_DATA PDU during an R2T-based
data transfer, the digest error handler in nvmet_tcp_try_recv_ddgst()
calls nvmet_req_uninit() — which performs percpu_ref_put() on the
submission queue — but does NOT mark the command as completed. It
does not set cqe->status, does not modify rbytes_done, and does not
clear any flag. When the subsequent fatal error triggers queue
teardown, nvmet_tcp_uninit_data_in_cmds() iterates all commands,
checks nvmet_tcp_need_data_in() for each one, and finds that the
already-uninited command still appears to need data (because
rbytes_done < transfer_len and cqe->status == 0). It therefore calls
nvmet_req_uninit() a second time on the same command — a double
percpu_ref_put against a single percpu_ref_get.
Reported-by: Shivam Kumar <kumar.shivam43666@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Chia-Lin Kao (AceLan) [Wed, 29 Apr 2026 08:11:16 +0000 (16:11 +0800)]
nvme-pci: fix use-after-free in nvme_free_host_mem()
nvme_free_host_mem() frees dev->hmb_sgt via dma_free_noncontiguous()
but never clears the pointer afterward. This leads to a use-after-free
if nvme_free_host_mem() is called twice in the same error path.
This can happen during nvme_probe() when nvme_setup_host_mem() succeeds
in allocating the HMB (setting dev->hmb_sgt) but nvme_set_host_mem()
fails with an I/O error:
nvme_setup_host_mem()
nvme_alloc_host_mem_single() -> sets dev->hmb_sgt
nvme_set_host_mem() -> fails with -EIO
nvme_free_host_mem() -> frees hmb_sgt, but does NOT NULL it
return error
nvme_probe() error path:
nvme_free_host_mem() -> dev->hmb_sgt is stale, use-after-free
The second call dereferences the freed sgt, causing a NULL pointer
dereference in iommu_dma_free_noncontiguous() when it accesses
sgt->sgl->dma_address (the backing memory has been freed and zeroed).
This is reproducible on Thunderbolt-attached NVMe devices (e.g., OWC
Envoy Express behind a Dell WD22TB4 dock) where the device intermittently
returns I/O errors during HMB setup due to PCIe link instability.
BUG: kernel NULL pointer dereference, address:
0000000000000010
RIP: 0010:iommu_dma_free_noncontiguous+0x22/0x80
Call Trace:
<TASK>
dma_free_noncontiguous+0x3b/0x130
nvme_free_host_mem+0x30/0xf0 [nvme]
nvme_probe.cold+0xcc/0x275 [nvme]
local_pci_probe+0x43/0xa0
pci_device_probe+0xeea/0x290
really_probe+0xf9/0x3b0
__driver_probe_device+0x8b/0x170
driver_probe_device+0x24/0xd0
__driver_attach_async_helper+0x6b/0x110
async_run_entry_fn+0x37/0x170
process_one_work+0x1ac/0x3d0
worker_thread+0x1b8/0x360
kthread+0xf7/0x130
ret_from_fork+0x2d8/0x3a0
ret_from_fork_asm+0x1a/0x30
</TASK>
Fix this by setting dev->hmb_sgt to NULL after freeing it, so the
second call takes the multi-descriptor path which safely handles the
already-cleaned-up state.
Fixes:
63a5c7a4b4c4 ("nvme-pci: use dma_alloc_noncontigous if possible")
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@canonical.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Hannes Reinecke [Thu, 30 Apr 2026 13:22:32 +0000 (15:22 +0200)]
nvmet-auth: Do not print DH-HMAC-CHAP secrets
From a security standpoint we should not allow to print out the DH-HMAC-CHAP
secrets, but at the same time having them is useful for debugging
authentication failures.
So add a Kconfig option NVME_TARGET_AUTH_DEBUG to only enable debugging
if explictly requested at build time.
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Hannes Reinecke <hare@kernel.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Keith Busch [Wed, 6 May 2026 13:16:02 +0000 (06:16 -0700)]
nvme: fix bio leak on mapping failure
The local bio is always NULL, so we'd leak the bio if the integrity
mapping failed. Just get it directly from the request.
Fixes:
d0d1d522316e91f ("blk-map: provide the bdev to bio if one exists")
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Keith Busch [Wed, 6 May 2026 13:05:14 +0000 (06:05 -0700)]
nvme: make prp passthrough usage less scary
The warning is a bit alarming, and it only prints for the very first
non-sgl capable device that receives a passthrough command. Just log an
informational message on initial discovery for every device.
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Ming Lei [Sun, 10 May 2026 14:48:43 +0000 (22:48 +0800)]
ublk: reject max_sectors smaller than PAGE_SECTORS in parameter validation
blk_validate_limits() requires max_hw_sectors >= PAGE_SECTORS and fires
a WARN_ON_ONCE if this invariant is violated. ublk_validate_params()
only checked the upper bound of max_sectors against max_io_buf_bytes,
allowing userspace to pass small values (including zero) that trigger
the warning when blk_mq_alloc_disk() is called from
ublk_ctrl_start_dev().
Before
494ea040bcb5, ublk used blk_queue_max_hw_sectors() which silently
clamped small values up to PAGE_SECTORS. The conversion to passing
queue_limits directly to blk_mq_alloc_disk() lost that clamping and now
hits blk_validate_limits()'s WARN_ON_ONCE instead.
Validate that max_sectors is at least PAGE_SECTORS in
ublk_validate_params() so invalid values are rejected early with
-EINVAL instead of reaching the block layer.
Fixes:
494ea040bcb5 ("ublk: pass queue_limits to blk_mq_alloc_disk")
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Link: https://patch.msgid.link/20260510144843.769031-1-tom.leiming@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Ming Lei [Fri, 8 May 2026 12:37:46 +0000 (20:37 +0800)]
ublk: fix use-after-free in ublk_cancel_cmd()
When ublk_reset_ch_dev() clears io->cmd via ublk_queue_reinit()
concurrently with ublk_cancel_cmd(), ublk_cancel_cmd() can read a
stale pointer and pass it to io_uring_cmd_done(), causing a
use-after-free.
Fix by synchronizing the two paths with ubq->cancel_lock:
- ublk_cancel_cmd(): read and clear io->cmd under cancel_lock,
then call io_uring_cmd_done() on the saved local copy outside
the lock.
- ublk_reset_ch_dev(): hold cancel_lock across ublk_queue_reinit()
so that io->cmd and io->flags are cleared atomically with respect
to ublk_cancel_cmd().
Fixes:
216c8f5ef0f2 ("ublk: replace monitor with cancelable uring_cmd")
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Link: https://patch.msgid.link/20260508123746.242018-1-tom.leiming@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Ming Lei [Wed, 6 May 2026 08:22:38 +0000 (16:22 +0800)]
ublk: validate physical_bs_shift, io_min_shift and io_opt_shift
ublk_validate_params() checks logical_bs_shift is within
[9, PAGE_SHIFT] but has no upper bound for physical_bs_shift,
io_min_shift, or io_opt_shift. A malicious userspace can set any
of these to a large value (e.g., 44), causing undefined behavior
from `1 << shift` in ublk_ctrl_start_dev() since the result is
stored in 32-bit unsigned int.
Cap all three at ilog2(SZ_256M) (28). 256M is big enough to cover
all practical block sizes, and originates from the maximum physical
block size possible in NVMe (lba_size * (1 + npwg), where npwg is
16-bit).
Also zero out ub->params with memset() when copy_from_user() fails
or ublk_validate_params() returns error, so that no stale or partial
params survive for a subsequent START_DEV to consume.
Fixes:
71f28f3136af ("ublk_drv: add io_uring based userspace block driver")
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Link: https://patch.msgid.link/20260506082238.22363-1-tom.leiming@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Mon, 4 May 2026 14:34:32 +0000 (08:34 -0600)]
block: only read from sqe on initial invocation of blkdev_uring_cmd()
This passthrough helper currently only supports discards. Part of that
command is the start and length, which is read from the SQE. It does
so on every invocation, where it really should just make it stable
on the first invocation. This avoids needing to copy the SQE upfront,
as we only really need those two 8b values stored in our per-req
payload.
Cc: stable@vger.kernel.org # 6.17+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Fri, 1 May 2026 11:23:12 +0000 (19:23 +0800)]
ublk: don't issue uring_cmd from fallback task work
When ublk_ch_uring_cmd_cb() runs as fallback task work (e.g., because
the submitting task is exiting), the command should not be issued as
current is a kworker, not the daemon task. This can cause io->task
to capture the wrong task in __ublk_fetch(), leading to a task
mismatch warning in ublk_uring_cmd_cancel_fn().
Check tw.cancel and return -ECANCELED instead of issuing the command
from fallback context.
Fixes:
3421c7f68bba ("ublk: make sure io cmd handled in submitter task context")
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Link: https://patch.msgid.link/20260501112312.947327-1-tom.leiming@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Tue, 28 Apr 2026 14:36:26 +0000 (08:36 -0600)]
Merge tag 'md-7.1-
20260428' of https://git./linux/kernel/git/mdraid/linux into block-7.1
Pull MD fixes from Yu Kuai:
"Bug Fixes:
- Fix a raid5 UAF on IO across the reshape position.
- Avoid failing RAID1/RAID10 devices for invalid IO errors.
- Fix RAID10 divide-by-zero when far_copies is zero.
- Restore bitmap grow through sysfs.
Cleanups:
- Use mddev_is_dm() instead of open-coding gendisk checks.
- Use ATTRIBUTE_GROUPS() for md default sysfs attributes.
- Replace open-coded wait loops with wait_event helpers."
* tag 'md-7.1-
20260428' of https://git.kernel.org/pub/scm/linux/kernel/git/mdraid/linux:
md: use ATTRIBUTE_GROUPS() for md default sysfs attributes
md: use mddev_is_dm() instead of open-coding gendisk checks
md/raid1: replace wait loop with wait_event_idle() in raid1_write_request()
md/md-bitmap: add a none backend for bitmap grow
md/md-bitmap: split bitmap sysfs groups
md: factor bitmap creation away from sysfs handling
md: use mddev_lock_nointr() in mddev_suspend_and_lock_nointr()
md: replace wait loop with wait_event() in md_handle_request()
md/raid10: fix divide-by-zero in setup_geo() with zero far_copies
md/raid1,raid10: don't fail devices for invalid IO errors
MAINTAINERS: Add Xiao Ni as md/raid reviewer
md/raid5: Fix UAF on IO across the reshape position
Abd-Alrhman Masalkhi [Thu, 23 Apr 2026 10:13:03 +0000 (12:13 +0200)]
md: use ATTRIBUTE_GROUPS() for md default sysfs attributes
Replace the md_default_group and md_attr_groups with
ATTRIBUTE_GROUPS().
Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
Link: https://lore.kernel.org/linux-raid/20260423101303.48196-4-abd.masalkhi@gmail.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Abd-Alrhman Masalkhi [Thu, 23 Apr 2026 10:13:02 +0000 (12:13 +0200)]
md: use mddev_is_dm() instead of open-coding gendisk checks
Replace direct checks on mddev->gendisk with mddev_is_dm() in
md_handle_request() and md_run().
Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
Link: https://lore.kernel.org/linux-raid/20260423101303.48196-3-abd.masalkhi@gmail.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Abd-Alrhman Masalkhi [Thu, 23 Apr 2026 10:13:01 +0000 (12:13 +0200)]
md/raid1: replace wait loop with wait_event_idle() in raid1_write_request()
The wait loop is equivalent to wait_event_idle(); use it to improve
readability.
Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
Link: https://lore.kernel.org/linux-raid/20260423101303.48196-2-abd.masalkhi@gmail.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Yu Kuai [Sat, 25 Apr 2026 02:46:15 +0000 (10:46 +0800)]
md/md-bitmap: add a none backend for bitmap grow
Add a real none bitmap backend that exposes the common bitmap sysfs
group and use it to keep bitmap/location available when an array has no
bitmap.
Then switch the bitmap location sysfs path to move only between none
and the classic bitmap backend, using the no-sysfs bitmap helpers while
merging or unmerging the internal bitmap sysfs group.
This restores mdadm --grow bitmap addition through bitmap/location.
Fixes:
fb8cc3b0d9db ("md/md-bitmap: delay registration of bitmap_ops until creating bitmap")
Reviewed-by: Su Yue <glass.su@suse.com>
Link: https://lore.kernel.org/r/20260425024615.1696892-4-yukuai@fnnas.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Yu Kuai [Sat, 25 Apr 2026 02:46:14 +0000 (10:46 +0800)]
md/md-bitmap: split bitmap sysfs groups
Split the classic bitmap sysfs files into a common bitmap group with
the location attribute and a separate internal bitmap group for the
remaining files.
At the same time, convert bitmap operations from a single sysfs group
to a sysfs group array so backends can share part of their sysfs
layout while adding backend-specific attributes separately.
Switch the bitmap sysfs helpers to use sysfs_update_groups() for the
add and update path, and remove groups in reverse order so shared named
groups are unmerged before the last group removes the directory.
Also make bitmap operation lookup depend only on the currently selected
bitmap id matching the installed backend. This prepares the lookup path
for a later registered none backend.
Reviewed-by: Su Yue <glass.su@suse.com>
Link: https://lore.kernel.org/r/20260425024615.1696892-3-yukuai@fnnas.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Yu Kuai [Sat, 25 Apr 2026 02:46:13 +0000 (10:46 +0800)]
md: factor bitmap creation away from sysfs handling
Factor bitmap creation and destruction into helpers that do not touch
bitmap sysfs registration.
This prepares the bitmap sysfs rework so callers such as the sysfs
bitmap location path can create or destroy a bitmap backend without
coupling that to sysfs group lifetime management.
Reviewed-by: Su Yue <glass.su@suse.com>
Link: https://lore.kernel.org/r/20260425024615.1696892-2-yukuai@fnnas.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Abd-Alrhman Masalkhi [Wed, 15 Apr 2026 14:03:19 +0000 (16:03 +0200)]
md: use mddev_lock_nointr() in mddev_suspend_and_lock_nointr()
This keeps mddev locking consistent and ensures that any future changes
to locking behavior are done through the wrapper.
Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
Link: https://lore.kernel.org/r/20260415140319.376578-3-abd.masalkhi@gmail.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Abd-Alrhman Masalkhi [Wed, 15 Apr 2026 14:03:18 +0000 (16:03 +0200)]
md: replace wait loop with wait_event() in md_handle_request()
The wait loop is equivalent to wait_event() and can be simplified by
usaing it for improving readability.
Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
Link: https://lore.kernel.org/r/20260415140319.376578-2-abd.masalkhi@gmail.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Junrui Luo [Thu, 16 Apr 2026 03:39:56 +0000 (11:39 +0800)]
md/raid10: fix divide-by-zero in setup_geo() with zero far_copies
setup_geo() extracts near_copies (nc) and far_copies (fc) from the
user-provided layout parameter without checking for zero. When fc=0
with the "improved" far set layout selected, 'geo->far_set_size =
disks / fc' triggers a divide-by-zero.
Validate nc and fc immediately after extraction, returning -1 if
either is zero.
Fixes:
475901aff158 ("MD RAID10: Improve redundancy for 'far' and 'offset' algorithms (part 1)")
Cc: stable@vger.kernel.org
Signed-off-by: Junrui Luo <moonafterrain@outlook.com>
Link: https://lore.kernel.org/linux-raid/SYBPR01MB7881A5E2556806CC1D318582AF232@SYBPR01MB7881.ausprd01.prod.outlook.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Keith Busch [Thu, 16 Apr 2026 14:03:45 +0000 (07:03 -0700)]
md/raid1,raid10: don't fail devices for invalid IO errors
BLK_STS_INVAL indicates the IO request itself was invalid, not that the
device has failed. When raid1 treats this as a device error, it retries
on alternate mirrors which fail the same way, eventually exceeding the
read error threshold and removing the device from the array.
This happens when stacking configurations bypass bio_split_to_limits()
in the IO path: dm-raid calls md_handle_request() directly without going
through md_submit_bio(), skipping the alignment validation that would
otherwise reject invalid bios early. The invalid bio reaches the
lower block layers, which fail the bio with BLK_STS_INVAL, and raid1
wrongly interprets this as a device failure.
Add BLK_STS_INVAL to raid1_should_handle_error() so that invalid IO
errors are propagated back to the caller rather than triggering device
removal. This is consistent with the previous kernel behavior when
alignment checks were done earlier in the direct-io path.
Fixes:
5ff3f74e145adc7 ("block: simplify direct io validity check")
Reported-by: Tomáš Trnka <trnka@scm.com>
Closes: https://lore.kernel.org/linux-block/
2982107.4sosBPzcNG@electra/
Signed-off-by: Keith Busch <kbusch@kernel.org>
Tested-by: Tomáš Trnka <trnka@scm.com>
Link: https://lore.kernel.org/r/20260416140345.3872265-1-kbusch@meta.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Xiao Ni [Tue, 14 Apr 2026 02:29:56 +0000 (10:29 +0800)]
MAINTAINERS: Add Xiao Ni as md/raid reviewer
I've been actively involved in the md subsystem, contributing bug
fixes, performance improvements, and participating in code reviews.
I will help improve patch review coverage and response time.
Signed-off-by: Xiao Ni <xiao@kernel.org>
Link: https://lore.kernel.org/r/20260414022956.48271-1-xiaoraid25@gmail.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Benjamin Marzinski [Wed, 8 Apr 2026 04:35:48 +0000 (00:35 -0400)]
md/raid5: Fix UAF on IO across the reshape position
If make_stripe_request() returns STRIPE_WAIT_RESHAPE,
raid5_make_request() will free the cloned bio. But raid5_make_request()
can call make_stripe_request() multiple times, writing to the various
stripes. If that bio got added to the toread or towrite lists of a
stripe disk in an earlier call to make_stripe_request(), then it's not
safe to just free the bio if a later part of it is found to cross the
reshape position. Doing so can lead to a UAF error, when bio_endio()
is called on the bio for the earlier stripes.
Instead, raid5_make_request() needs to wait until all parts of the bio
have called bio_endio(). To do this, bios that cross the reshape
position while the reshape can't make progress are flagged as needing to
wait for all parts to complete. When raid5_make_request() has a bio that
failed make_stripe_request() with STRIPE_WAIT_RESHAPE, it sets
bi->bi_private to a completion struct and waits for completion after
ending the bio. When the bio_endio() is called for the last time on a
clone bio with bi->bi_private set, it wakes up the waiter. This
guarantees that raid5_make_request() doesn't return until the cloned bio
needing a retry for io across the reshape boundary is safely cleaned up.
There is a simple reproducer available at [1]. Compile the kernel with
KASAN for more useful reporting when the error is triggered (this is not
necessary to see the bug).
[1] https://gist.github.com/bmarzins/
e48598824305cf2171289e47d7241fa5
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Reviewed-by: Xiao Ni <xni@redhat.com>
Link: https://lore.kernel.org/r/20260408043548.1695157-1-bmarzins@redhat.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Daan De Meyer [Mon, 27 Apr 2026 21:01:39 +0000 (22:01 +0100)]
cdrom, scsi: sr: propagate read-only status to block layer via set_disk_ro()
The cdrom core never calls set_disk_ro() for a registered device, so
BLKROGET on a CD-ROM device always returns 0 (writable), even when the
drive has no write capabilities and writes will inevitably fail. This
causes problems for userspace that relies on BLKROGET to determine
whether a block device is read-only. For example, systemd's loop device
setup uses BLKROGET to decide whether to create a loop device with
LO_FLAGS_READ_ONLY. Without the read-only flag, writes pass through the
loop device to the CD-ROM and fail with I/O errors. systemd-fsck
similarly checks BLKROGET to decide whether to run fsck in no-repair
mode (-n).
The write-capability bits in cdi->mask come from two different sources:
CDC_DVD_RAM and CDC_CD_RW are populated by the driver from the MODE
SENSE capabilities page (page 0x2A) before register_cdrom() is called,
while CDC_MRW_W and CDC_RAM require the MMC GET CONFIGURATION command
and were only probed by cdrom_open_write() at device open time. This
meant that any attempt to compute the writable state from the full
mask at probe time was incorrect, because the GET CONFIGURATION bits
were still unset (and cdi->mask is initialized such that capabilities
are assumed present).
Fix this by factoring the GET CONFIGURATION probing out of
cdrom_open_write() into a new exported helper,
cdrom_probe_write_features(), and having sr call it from sr_probe()
right after get_capabilities() has populated the MODE SENSE bits.
register_cdrom() then calls set_disk_ro() based on the full
write-capability mask (CDC_DVD_RAM | CDC_MRW_W | CDC_RAM | CDC_CD_RW)
so the block layer reflects the drive's actual write support. The
feature queries used (CDF_MRW and CDF_RWRT via GET CONFIGURATION with
RT=00) report drive-level capabilities that are persistent across
media, so a single probe before register_cdrom() is sufficient and the
redundant probe at open time is dropped.
With set_disk_ro() now accurate, the long-vestigial cd->writeable flag
in sr can go: get_capabilities() used to set cd->writeable based on
the same four mask bits, but because CDC_MRW_W and CDC_RAM default to
"capability present" in cdi->mask and aren't touched by MODE SENSE,
the condition that gated cd->writeable was always true, making it
unconditionally 1. Replace the corresponding gate in sr_init_command()
with get_disk_ro(cd->disk), which turns a previously no-op check into
a real one and also catches kernel-internal bio writers that bypass
blkdev_write_iter()'s bdev_read_only() check.
The sd driver (SCSI disks) does not have this problem because it
checks the MODE SENSE Write Protect bit and calls set_disk_ro()
accordingly. The sr driver cannot use the same approach because the
MMC specification does not define the WP bit in the MODE SENSE
device-specific parameter byte for CD-ROM devices.
Fixes:
1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Daan De Meyer <daan@amutable.com>
Reviewed-by: Phillip Potter <phil@philpotter.co.uk>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://patch.msgid.link/20260427210139.1400-2-phil@philpotter.co.uk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Mon, 27 Apr 2026 21:47:21 +0000 (15:47 -0600)]
Merge tag 'nvme-7.1-2026-04-24' of git://git.infradead.org/nvme into block-7.1
Pull NVMe fixes from Keith:
"- Target data transfer size confiruation (Aurelien)
- Enable P2P for RDMA (Shivaji Kant)
- TCP target updates (Maurizio, Alistair, Chaitanya, Shivam Kumar)
- TCP host updates (Alistair, Chaitanya)
- Authentication updates (Alistair, Daniel, Chris Leech)
- Multipath fixes (John Garry)
- New quirks (Alan Cui, Tao Jiang)
- Apple driver fix (Fedor Pchelkin)
- PCI admin doorbell update fix (Keith)"
* tag 'nvme-7.1-2026-04-24' of git://git.infradead.org/nvme: (22 commits)
nvme-auth: Hash DH shared secret to create session key
nvme-pci: fix missed admin queue sq doorbell write
nvme-auth: Include SC_C in RVAL controller hash
nvme-tcp: teardown circular locking fixes
nvmet-tcp: Don't clear tls_key when freeing sq
Revert "nvmet-tcp: Don't free SQ on authentication success"
nvme: skip trace completion for host path errors
nvme-pci: add quirk for Memblaze Pblaze5 (0x1c5f:0x0555)
nvme-multipath: put module reference when delayed removal work is canceled
nvme: expose TLS mode
nvme-apple: drop invalid put of admin queue reference count
nvme-core: fix parameter name in comment
nvmet: avoid recursive nvmet-wq flush in nvmet_ctrl_free
nvme-multipath: drop head pointer check in nvme_mpath_clear_current_path()
nvme: add quirk NVME_QUIRK_IGNORE_DEV_SUBNQN for 144d:a808 (Samsung PM981/983/970 EVO Plus )
nvmet-tcp: fix race between ICReq handling and queue teardown
nvmet-tcp: remove redundant calls to nvmet_tcp_fatal_error()
nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
nvme: enable PCI P2PDMA support for RDMA transport
nvmet: introduce new mdts configuration entry
...
Linus Torvalds [Sun, 26 Apr 2026 21:19:00 +0000 (14:19 -0700)]
Linux 7.1-rc1
Linus Torvalds [Sun, 26 Apr 2026 21:03:20 +0000 (14:03 -0700)]
Merge tag 'clk-for-linus' of git://git./linux/kernel/git/clk/linux
Pull clk fix from Stephen Boyd:
"One more fix for the merge window to avoid a boot hang on
Raspberry Pi 3B by marking the VEC clk critical so that it
doesn't get turned off and hang the bus"
* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: bcm: rpi: Mark VEC clock as CLK_IGNORE_UNUSED
Linus Torvalds [Sun, 26 Apr 2026 16:51:29 +0000 (09:51 -0700)]
Merge tag 'tsm-for-7.1' of git://git./linux/kernel/git/devsec/tsm
Pull PCIe TSP update from Dan Williams:
"A small update for the TSM core. It is arguably a fix and coming in
late as I have been offline the past few weeks:
- Drop class_create() for the 'tsm' class"
* tag 'tsm-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsm:
virt: coco: change tsm_class to a const struct
Linus Torvalds [Sun, 26 Apr 2026 00:04:15 +0000 (17:04 -0700)]
Merge tag 'kbuild-fixes-7.1-1' of git://git./linux/kernel/git/kbuild/linux
Pull Kbuild fixes from Nicolas Schier:
- builddeb - avoid recompiles for non-cross-compiles
Avoid triggering complete rebuilds for non-cross-compile Debian
package builds by only triggering the rebuild of host tools for
actual cross-compile builds
- Never respect CONFIG_WERROR / W=e to fixdep
Avoid spurious rebuilds of fixdep w/ and w/o -Werror during a single
kbuild invocation by never respecting CONFIG_WERROR for fixdep
* tag 'kbuild-fixes-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux:
kbuild: Never respect CONFIG_WERROR / W=e to fixdep
kbuild: builddeb - avoid recompiles for non-cross-compiles
Linus Torvalds [Sat, 25 Apr 2026 23:58:34 +0000 (16:58 -0700)]
Merge tag 'power-utilities-2026.04.25' of git://git./linux/kernel/git/lenb/linux
Pull power utility updates from Len Brown:
"x86_energy_perf_policy:
- Initial SoC Slider support
turbostat:
- Display HT siblings in cpu# order
- Add Module-ID column
- Print Core-ID and APIC-ID in hex
- Fix misc bugs"
* tag 'power-utilities-2026.04.25' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
tools/power x86_energy_perf_policy: Version 2026.04.25
tools/power x86_energy_perf_policy.8: Document SoC Slider Options
tools/power x86_energy_perf_policy: Enhances SoC Slider related checks
tools/power turbostat: v2026.04.21
tools/power turbostat: Process HT siblings in CPU order
tools/power turbostat: Show module_id column
tools/power turbostat: Print core_id and apic_id in hex
tools/power turbostat: Cleanup print helper functions
tools/power turbostat: Fix --cpu-set 1 regression on HT systems
tools/power turbostat: Fix --cpu-set 0 regression on HT systems
tools/power turbostat: Fix unrecognized option '-P'
tools/power turbostat: Fix AMD RAPL regression on big systems
tools/power/x86: Add SOC slider and platform profile support
Linus Torvalds [Sat, 25 Apr 2026 23:39:03 +0000 (16:39 -0700)]
Merge tag 'rtc-7.1' of git://git./linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"Subsystem:
- add data_race() in rtc_dev_poll()
Drivers:
- remove i2c_match_id usage
- abx80x: Disable alarm feature if no interrupt attached
- ti-k3: support resuming from IO DDR low power mode"
* tag 'rtc-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
rtc: abx80x: Disable alarm feature if no interrupt attached
rtc: ntxec: fix OF node reference imbalance
rtc: pic32: allow driver to be compiled with COMPILE_TEST
rtc: ti-k3: Add support to resume from IO DDR low power mode
rtc: cmos: Use platform_get_irq_optional() in cmos_platform_probe()
dt-bindings: rtc: add olpc,xo1-rtc to trivial-rtc
dt-bindings: rtc: sc2731: Add compatible for SC2730
rtc: add data_race() in rtc_dev_poll()
rtc: armada38x: zalloc + calloc to single allocation
dt-bindings: rtc: isl12026: convert to YAML schema
dt-bindings: rtc: microcrystal,rv3028: Allow to specify vdd-supply
rtc: max77686: convert to i2c_new_ancillary_device
dt-bindings: rtc: mpfs-rtc: permit resets
rtc: rx8025: Remove use of i2c_match_id()
rtc: rv8803: Remove use of i2c_match_id()
rtc: rs5c372: Remove use of i2c_match_id()
rtc: pcf2127: Remove use of i2c_match_id()
rtc: m41t80: Remove use of i2c_match_id()
rtc: abx80x: Remove use of i2c_match_id()
Linus Torvalds [Sat, 25 Apr 2026 23:20:52 +0000 (16:20 -0700)]
Merge tag 'for-next-tpm-7.1-rc1' of git://git./linux/kernel/git/jarkko/linux-tpmdd
Pull tpm updates from Jarkko Sakkinen:
"Here are the accumulated fixes for 7.1-rc1 and a single structural
change worth mentioning separately: Rafael's commit converting tpm_crb
from ACPI driver to a platform driver"
* tag 'for-next-tpm-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
tpm: tpm_tis: stop transmit if retries are exhausted
tpm: tpm_tis: add error logging for data transfer
tpm: avoid -Wunused-but-set-variable
tpm: Use kfree_sensitive() to free auth session in tpm_dev_release()
tpm2-sessions: Fix missing tpm_buf_destroy() in tpm2_read_public()
tpm: Fix auth session leak in tpm2_get_random() error path
tpm: i2c: atmel: fix block comment formatting
tpm_crb: Convert ACPI driver to a platform one
tpm: Make tcpci_pm_ops variable static const
Len Brown [Sat, 25 Apr 2026 18:26:32 +0000 (14:26 -0400)]
Merge branches 'turbostat' and 'x86_energy_perf_policy' into power-utilities
Len Brown [Sat, 25 Apr 2026 17:26:16 +0000 (13:26 -0400)]
tools/power x86_energy_perf_policy: Version 2026.04.25
Since v2025.11.22:
Initial SoC Slider support
SoC Slider is an SoC-wide power/performance policy setting.
On SoC Slider systems, EPP plays a diminished role.
Whitespace cleanup via: indent -npro -kr -i8 -ts8 -sob -l160 -ss -ncs -cp1
No functional changes
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Sat, 25 Apr 2026 16:10:54 +0000 (12:10 -0400)]
tools/power x86_energy_perf_policy.8: Document SoC Slider Options
x86_energy_perf_policy accesses the SoC Slider via standard
user/kernel APIs to the processor_thermal_soc_slider driver.
Machines that support SoC Slider largely use it instead of EPP,
which may continue to exist in a diminished role, or vanish entirely.
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Wed, 15 Apr 2026 19:12:29 +0000 (15:12 -0400)]
tools/power x86_energy_perf_policy: Enhances SoC Slider related checks
When processor_thermal_soc_slider is loaded, its slider
and offset modparams are visible. Check that the driver
actually registered the profile named "SoC Slider" before
reading or writing these modparams.
n.b. This utility allows writing the Slider and Offset modparams
even if the driver policy is not "balanced". Currently the
processor_thermal_soc_slider consults those modparams
only in "balanced" mode.
Signed-off-by: Len Brown <len.brown@intel.com>
Maíra Canal [Fri, 24 Apr 2026 15:34:52 +0000 (16:34 +0100)]
clk: bcm: rpi: Mark VEC clock as CLK_IGNORE_UNUSED
On Raspberry Pi 3B, the VEC clock is used by the VideoCore firmware
display driver, which remains active until the vc4 driver loads and
sends NOTIFY_DISPLAY_DONE. If this clock is disabled during boot, a bus
lockup happens and the firmware becomes unresponsive, causing a complete
system lockup.
Mark the VEC clock with CLK_IGNORE_UNUSED so it survives the unused
clock disablement and remains available until the vc4 driver takes over
display management.
Fixes:
672299736af6 ("clk: bcm: rpi: Manage clock rate in prepare/unprepare callbacks")
Reported-by: Mark Brown <broonie@kernel.org>
Closes: https://lore.kernel.org/r/
5f0bec08-f458-4fba-8bf3-
06817a100c4c@sirena.org.uk
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Link: https://patch.msgid.link/20260401111416.562279-2-mcanal@igalia.com
Tested-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Brian Masney <bmasney@redhat.com> # Active contributor to clk
Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Linus Torvalds [Sat, 25 Apr 2026 14:48:33 +0000 (07:48 -0700)]
Merge tag 'fbdev-for-7.1-rc1-2' of git://git./linux/kernel/git/deller/linux-fbdev
Pull fbdev fixes from Helge Deller:
- request memory region before use (cobalt_lcdfb, clps711x-fb, hgafb)
- reference cleanups in failure path (offb, savage)
- a spelling fix (atyfb)
* tag 'fbdev-for-7.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
fbdev: hgafb: Request memory region before ioremap
fbdev: clps711x-fb: Request memory region for MMIO
fbdev: cobalt_lcdfb: Request memory region
fbdev: atyfb: Fix spelling mistake "enfore" -> "enforce"
fbdev: savage: fix probe-path EDID cleanup leaks
fbdev: offb: fix PCI device reference leak on probe failure
Linus Torvalds [Sat, 25 Apr 2026 14:44:26 +0000 (07:44 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/rmk/linux
Pull ARM updates from Russell King:
- fix a race condition handling PG_dcache_clean
- further cleanups for the fault handling, allowing RT to be enabled
- fixing nzones validation in adfs filesystem driver
- fix for module unwinding
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux:
ARM: 9463/1: Allow to enable RT
ARM: 9472/1: fix race condition on PG_dcache_clean in __sync_icache_dcache()
ARM: 9471/1: module: fix unwind section relocation out of range error
fs/adfs: validate nzones in adfs_validate_bblk()
ARM: provide individual is_translation_fault() and is_permission_fault()
ARM: move FSR fault status definitions before fsr_fs()
ARM: use BIT() and GENMASK() for fault status register fields
ARM: move is_permission_fault() and is_translation_fault() to fault.h
ARM: move vmalloc() lazy-page table population
ARM: ensure interrupts are enabled in __do_user_fault()
Linus Torvalds [Fri, 24 Apr 2026 22:17:23 +0000 (15:17 -0700)]
Merge tag 'trace-ring-buffer-v7.1-3' of git://git./linux/kernel/git/trace/linux-trace
Pull ring-buffer fix from Steven Rostedt:
- Fix accounting of persistent ring buffer rewind
On boot up, the head page is moved back to the earliest point of the
saved ring buffer. This is because the ring buffer being read by user
space on a crash may not save the part it read. Rewinding the head
page back to the earliest saved position helps keep those events from
being lost.
The number of events is also read during boot up and displayed in the
stats file in the tracefs directory. It's also used for other
accounting as well. On boot up, the "reader page" is accounted for
but a rewind may put it back into the buffer and then the reader page
may be accounted for again.
Save off the original reader page and skip accounting it when
scanning the pages in the ring buffer.
* tag 'trace-ring-buffer-v7.1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
ring-buffer: Do not double count the reader_page
Linus Torvalds [Fri, 24 Apr 2026 22:06:55 +0000 (15:06 -0700)]
Merge tag 'block-7.1-
20260424' of git://git./linux/kernel/git/axboe/linux
Pull block fixes from Jens Axboe:
- Series for zloop, fixing a variety of issues
- t10-pi code cleanup
- Fix for a merge window regression with the bio memory allocation mask
- Fix for a merge window regression in ublk, caused by an issue with
the maple tree iteration code at teardown
- ublk self tests additions
- Zoned device pgmap fixes
- Various little cleanups and fixes
* tag 'block-7.1-
20260424' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (21 commits)
Revert "floppy: fix reference leak on platform_device_register() failure"
ublk: avoid unpinning pages under maple tree spinlock
ublk: refactor common helper ublk_shmem_remove_ranges()
ublk: fix maple tree lockdep warning in ublk_buf_cleanup
selftests: ublk: add ublk auto integrity test
selftests: ublk: enable test_integrity_02.sh on fio 3.42
selftests: ublk: remove unused argument to _cleanup
block: only restrict bio allocation gfp mask asked to block
block/blk-throttle: Add WQ_PERCPU to alloc_workqueue users
block: Add WQ_PERCPU to alloc_workqueue users
block: relax pgmap check in bio_add_page for compatible zone device pages
block: add pgmap check to biovec_phys_mergeable
floppy: fix reference leak on platform_device_register() failure
ublk: use unchecked copy helpers for bio page data
t10-pi: reduce ref tag code duplication
zloop: remove irq-safe locking
zloop: factor out zloop_mark_{full,empty} helpers
zloop: set RQF_QUIET when completing requests on deleted devices
zloop: improve the unaligned write pointer warning
zloop: use vfs_truncate
...
Linus Torvalds [Fri, 24 Apr 2026 22:00:54 +0000 (15:00 -0700)]
Merge tag 'io_uring-7.1-
20260424' of git://git./linux/kernel/git/axboe/linux
Pull io_uring fixes from Jens Axboe:
- Fix for a NOMMU bug with io_uring, where NOMMU doesn't grab page refs
at mmap time. NOMMU also has entirely broken FOLL_PIN support, yet
here we are
- A few fixes covering minor issues introduced in this merge window
- data race annotation to shut up KCSAN for when io-wq limits are
applied
- A nospec addition for direct descriptor file updating. Rest of the
direct descriptor path already had this, but for some reason the
update did not. Now they are all the same
- Various minor defensive changes that claude identified and suggested
terrible fixes for, turned into actually useful cleanups:
- Use kvfree() for the imu cache. These can come from kmalloc or
vmalloc depending on size, but the in-cache ones are capped
where it's always kmalloc based. Change to kvfree() in the
cleanup path, making future changes unlikely to mess that up
- Negative kbuf consumption lengths. Can't happen right now, but
cqe->res is used directly, which if other codes changes could
then be an error value
- Fix for an issue with the futex code, where partial wakes on a
vectored fuxes would potentially wake the same futex twice, rather
than move on to the next one. This could confuse an application as it
would've expected the next futex to have been woken
- Fix for a bug with ring resizing, where SQEs or CQEs might not have
been copied correctly if large SQEs or CQEs are used in the ring.
Application side issue, where SQEs or CQEs might have been lost
during resize
- Fix for a bug where EPOLL_URING_WAKE might have been lost, causing a
multishot poll to not be terminated when it's nested, like it should
have been
- Fix for an issue with signed comparison of poll references for the
slow path
- Fix for a user struct UAF in the zcrx code
- Two minor zcrx cleanups
* tag 'io_uring-7.1-
20260424' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
io_uring: take page references for NOMMU pbuf_ring mmaps
io_uring/poll: ensure EPOLL_ONESHOT is propagated for EPOLL_URING_WAKE
io_uring/zcrx: warn on freelist violations
io_uring/zcrx: clear RQ headers on init
io_uring/zcrx: fix user_struct uaf
io_uring/register: fix ring resizing with mixed/large SQEs/CQEs
io_uring/futex: ensure partial wakes are appropriately dequeued
io_uring/rw: add defensive hardening for negative kbuf lengths
io_uring/rsrc: use kvfree() for the imu cache
io_uring/rsrc: unify nospec indexing for direct descriptors
io_uring: fix spurious fput in registered ring path
io_uring: fix iowq_limits data race in tctx node addition
io_uring/tctx: mark io_wq as exiting before error path teardown
io_uring/tctx: check for setup tctx->io_wq before teardown
io_uring/poll: fix signed comparison in io_poll_get_ownership()
Linus Torvalds [Fri, 24 Apr 2026 21:20:03 +0000 (14:20 -0700)]
Merge tag 'nfs-for-7.1-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Bugfixes:
- Fix handling of ENOSPC so that if we have to resend writes, they
are written synchronously
- SUNRPC RDMA transport fixes from Chuck
- Several fixes for delegated timestamps in NFSv4.2
- Failure to obtain a directory delegation should not cause stat() to
fail with NFSv4
- Rename was failing to update timestamps when a directory delegation
is held on NFSv4
- Ensure we check rsize/wsize after crossing a NFSv4 filesystem
boundary
- NFSv4/pnfs:
- If the server is down, retry the layout returns on reboot
- Fallback to MDS could result in a short write being incorrectly
logged
Cleanups:
- Use memcpy_and_pad in decode_fh"
* tag 'nfs-for-7.1-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (21 commits)
NFS: Fix RCU dereference of cl_xprt in nfs_compare_super_address
NFS: remove redundant __private attribute from nfs_page_class
NFSv4.2: fix CLONE/COPY attrs in presence of delegated attributes
NFS: fix writeback in presence of errors
nfs: use memcpy_and_pad in decode_fh
NFSv4.1: Apply session size limits on clone path
NFSv4: retry GETATTR if GET_DIR_DELEGATION failed
NFS: fix RENAME attr in presence of directory delegations
pnfs/flexfiles: validate ds_versions_cnt is non-zero
NFS/blocklayout: print each device used for SCSI layouts
xprtrdma: Post receive buffers after RPC completion
xprtrdma: Scale receive batch size with credit window
xprtrdma: Replace rpcrdma_mr_seg with xdr_buf cursor
xprtrdma: Decouple frwr_wp_create from frwr_map
xprtrdma: Close lost-wakeup race in xprt_rdma_alloc_slot
xprtrdma: Avoid 250 ms delay on backlog wakeup
xprtrdma: Close sendctx get/put race that can block a transport
nfs: update inode ctime after removexattr operation
nfs: fix utimensat() for atime with delegated timestamps
NFS: improve "Server wrote zero bytes" error
...
Linus Torvalds [Fri, 24 Apr 2026 20:47:19 +0000 (13:47 -0700)]
Merge tag 'ceph-for-7.1-rc1' of https://github.com/ceph/ceph-client
Pull ceph updates from Ilya Dryomov:
"We have a series from Alex which extends CephFS client metrics with
support for per-subvolume data I/O performance and latency tracking
(metadata operations aren't included) and a good variety of fixes and
cleanups across RBD and CephFS"
* tag 'ceph-for-7.1-rc1' of https://github.com/ceph/ceph-client:
ceph: add subvolume metrics collection and reporting
ceph: parse subvolume_id from InodeStat v9 and store in inode
ceph: handle InodeStat v8 versioned field in reply parsing
libceph: Fix slab-out-of-bounds access in auth message processing
rbd: fix null-ptr-deref when device_add_disk() fails
crush: cleanup in crush_do_rule() method
ceph: clear s_cap_reconnect when ceph_pagelist_encode_32() fails
ceph: only d_add() negative dentries when they are unhashed
libceph: update outdated comment in ceph_sock_write_space()
libceph: Remove obsolete session key alignment logic
ceph: fix num_ops off-by-one when crypto allocation fails
libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply()
Linus Torvalds [Fri, 24 Apr 2026 20:40:25 +0000 (13:40 -0700)]
Merge tag 'ntfs-for-7.1-rc1-part2' of git://git./linux/kernel/git/linkinjeon/ntfs
Pull ntfs updates from Namjae Jeon:
- Fix potential data leakage by zeroing the portion of the straddle
block beyond initialized_size when reading non-resident attributes
- Remove unnecessary zeroing in ntfs_punch_hole() for ranges beyond
initialized_size, as they are already returned as zeros on read
- Fix writable check in ntfs_file_mmap_prepare() to correctly handle
shared mappings using VMA_SHARED_BIT | VMA_MAYWRITE_BIT
- Use page allocation instead of kmemdup() for IOMAP_INLINE data to
ensure page-aligned address and avoid BUG trap in
iomap_inline_data_valid() caused by the page boundary check
- Add a size check before memory allocation in ntfs_attr_readall() and
reject overly large attributes
- Remove unneeded noop_direct_IO from ntfs_aops as it is no longer
required following the FMODE_CAN_ODIRECT flag
- Fix seven static analysis warnings reported by Smatch
* tag 'ntfs-for-7.1-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfs:
ntfs: use page allocation for resident attribute inline data
ntfs: fix mmap_prepare writable check for shared mappings
ntfs: fix potential 32-bit truncation in ntfs_write_cb()
ntfs: fix uninitialized variable in ntfs_map_runlist_nolock
ntfs: delete dead code
ntfs: add missing error code in ntfs_mft_record_alloc()
ntfs: fix uninitialized variables in ntfs_ea_set_wsl_inode()
ntfs: fix uninitialized pointer in ntfs_write_mft_block
ntfs: fix uninitialized variable in ntfs_write_simple_iomap_begin_non_resident
ntfs: remove noop_direct_IO from address_space_operations
ntfs: limit memory allocation in ntfs_attr_readall
ntfs: not zero out range beyond init in punch_hole
ntfs: zero out stale data in straddle block beyond initialized_size
Linus Torvalds [Fri, 24 Apr 2026 20:37:26 +0000 (13:37 -0700)]
Merge tag '9p-for-7.1-rc1' of https://github.com/martinetd/linux
Pull 9p updates from Dominique Martinet:
- 9p access flag fix (cannot change access flag since new mount API implem)
- some minor cleanup
* tag '9p-for-7.1-rc1' of https://github.com/martinetd/linux:
9p/trans_xen: replace simple_strto* with kstrtouint
9p/trans_xen: make cleanup idempotent after dataring alloc errors
9p: document missing enum values in kernel-doc comments
9p: fix access mode flags being ORed instead of replaced
9p: fix memory leak in v9fs_init_fs_context error path
Linus Torvalds [Fri, 24 Apr 2026 20:30:54 +0000 (13:30 -0700)]
Merge tag 'spdx-7.1-rc1' of git://git./linux/kernel/git/gregkh/spdx
Pull SPDX update from Greg KH:
"Here is a single SPDX-like change for 7.1-rc1. It explicitly allows
the use of SPDX-FileCopyrightText which has been used already in many
files.
At the same time, update checkpatch to catch any "non allowed" spdx
identifiers as we don't want to go overboard here.
This has been in linux-next for a long time with no reported problems"
* tag 'spdx-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx:
LICENSES: Explicitly allow SPDX-FileCopyrightText
Linus Torvalds [Fri, 24 Apr 2026 20:23:50 +0000 (13:23 -0700)]
Merge tag 'char-misc-7.1-rc1' of git://git./linux/kernel/git/gregkh/char-misc
Pull char / misc / IIO / and others driver updates from Greg KH:
"Here is the char/misc/iio and other smaller driver subsystem updates
for 7.1-rc1. Lots of stuff in here, all tiny, but relevant for the
different drivers they touch. Major points in here is:
- the usual large set of new IIO drivers and updates for that
subsystem (the large majority of this diffstat)
- lots of comedi driver updates and bugfixes
- coresight driver updates
- interconnect driver updates and additions
- mei driver updates
- binder (both rust and C versions) updates and fixes
- lots of other smaller driver subsystem updates and additions
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (405 commits)
coresight: tpdm: fix invalid MMIO access issue
mei: me: add nova lake point H DID
mei: lb: add late binding version 2
mei: bus: add mei_cldev_uuid
w1: ds2490: drop redundant device reference
bus: mhi: host: pci_generic: Add Telit
FE912C04 modem support
mei: csc: wake device while reading firmware status
mei: csc: support controller with separate PCI device
mei: convert PCI error to common errno
mei: trace: print return value of pci_cfg_read
mei: me: move trace into firmware status read
mei: fix idle print specifiers
mei: me: use PCI_DEVICE_DATA macro
sonypi: Convert ACPI driver to a platform one
misc: apds990x: fix all kernel-doc warnings
most: usb: Use kzalloc_objs for endpoint address array
hpet: Convert ACPI driver to a platform one
misc: vmw_vmci: Fix spelling mistakes in comments
parport: Remove completed item from to-do list
char: remove unnecessary module_init/exit functions
...
Linus Torvalds [Fri, 24 Apr 2026 20:16:36 +0000 (13:16 -0700)]
Merge tag 'spi-fix-v7.1-merge-window' of git://git./linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"This is quite a big set of fixes, almost all from Johan Hovold who is
on an ongoing quest to clean up issues with probe and removal handling
in drivers.
There isn't anything too concerning here especially with the
deregistration stuff which will very rarely get run in production
systems since this is all platform devices in the SoC on embedded
hardware, but it's all real issues which should be fixed. There's more
in flight here.
We also have a few other minor fixes, one from Felix Gu along the same
lines as Johan's work and a couple of documentation things"
* tag 'spi-fix-v7.1-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (23 commits)
spi: fix controller cleanup() documentation
spi: fix resource leaks on device setup failure
spi: axiado: clean up probe return value
spi: axiado: rename probe error labels
spi: axiado: fix runtime pm imbalance on probe failure
spi: orion: clean up probe return value
spi: orion: fix clock imbalance on registration failure
spi: orion: fix runtime pm leak on unbind
spi: imx: fix runtime pm leak on probe deferral
spi: mpc52xx: fix use-after-free on registration failure
spi: Fix the error description in the `ptp_sts_word_post` comment
spi: topcliff-pch: fix use-after-free on unbind
spi: topcliff-pch: fix controller deregistration
spi: orion: fix controller deregistration
spi: mxic: fix controller deregistration
spi: mpc52xx: fix use-after-free on unbind
spi: mpc52xx: fix controller deregistration
spi: cadence-quadspi: fix controller deregistration
spi: cadence: fix controller deregistration
spi: mtk-snfi: fix memory leak in probe
...
Linus Torvalds [Fri, 24 Apr 2026 20:06:25 +0000 (13:06 -0700)]
Merge tag 'regulator-fix-v7.1-merge-window' of git://git./linux/kernel/git/broonie/regulator
Pull regulator fix from Mark Brown:
"Just one trivial cleanup of the user visible prompts in Kconfig here,
standardising how we describe Qualcomm"
* tag 'regulator-fix-v7.1-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: qcom: Unify user-visible "Qualcomm" name
Masami Hiramatsu (Google) [Fri, 24 Apr 2026 06:52:10 +0000 (15:52 +0900)]
ring-buffer: Do not double count the reader_page
Since the cpu_buffer->reader_page is updated if there are unwound
pages. After that update, we should skip the page if it is the
original reader_page, because the original reader_page is already
checked.
Cc: stable@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Ian Rogers <irogers@google.com>
Link: https://patch.msgid.link/177701353063.2223789.1471163147644103306.stgit@mhiramat.tok.corp.google.com
Fixes:
ca296d32ece3 ("tracing: ring_buffer: Rewind persistent ring buffer on reboot")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Linus Torvalds [Fri, 24 Apr 2026 19:11:26 +0000 (12:11 -0700)]
Merge tag 'regmap-fix-v7.1-merge-window' of git://git./linux/kernel/git/broonie/regmap
Pull regmap fixes from Mark Brown:
"There's couple of patches here that came in since my pull request:
- What is effectively a quirk for shoehorning support for a wider
range of I2C regmaps on weirdly restricted SMBus controllers
- One minor fix for a memory leak on in error handling in the dummy
driver used by the KUnit tests"
* tag 'regmap-fix-v7.1-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
regmap: ram: fix memory leaks in __regmap_init_ram() on error
regmap-i2c: add SMBus byte/word reg16 bus for adapters lacking I2C_FUNC_I2C
Linus Torvalds [Fri, 24 Apr 2026 18:59:46 +0000 (11:59 -0700)]
Merge tag 'gpio-fixes-for-v7.1-rc1' of git://git./linux/kernel/git/brgl/linux
Pull gpio fixes from Bartosz Golaszewski:
- fix a regression in gpio-rockchip introduced on older chips during
the merge window when converting to dynamic GPIO base
- fix AST2700 debounce selector bit definitions in gpio-aspeed
* tag 'gpio-fixes-for-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
gpio: aspeed: fix AST2700 debounce selector bit definitions
gpio: rockchip: Fix GPIO regression after conversion to dynamic base allocation
Linus Torvalds [Fri, 24 Apr 2026 18:49:20 +0000 (11:49 -0700)]
Merge tag 'sound-fix-7.1-rc1' of git://git./linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Here are the rest of small updates for 7.1-rc1. All small fixes mostly
for device-specific issues or regressions.
Core:
- Fix a potential data race in fasync handling
USB-audio:
- New device support: Line6 POD HD PRO, NexiGo N930W webcam
- Fixes for Audio Advantage Micro II SPDIF switch and E-MU sample
rates
- Limit UAC2 rate parsing to prevent potential overflows
HD-Audio:
- Device-specific quirks for HP, Acer, and Honor laptops
- Fix for TAS2781 SPI device abnormal sound
- Move Intel firmware loading into probe work to avoid stalling
ASoC:
- New support for TI TAS5832
- Fixes for SoundWire SDCA/DisCo boolean parsing
- Driver-specific fixes for Intel SOF, ES8311, RT1320, and PXA2xx
Misc:
- Fixes for resource leaks and data races in 6fire, caiaq, als4000,
and pcmtest drivers"
* tag 'sound-fix-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (41 commits)
Revert "ALSA: pcmtest: fix reference leak on failed device registration"
ASoC: tas2781: Add tas5832 support
ASoC: dt-bindings: ti,tas2781: Add TAS5832 support
ALSA: usb-audio: Fix Audio Advantage Micro II SPDIF switch
ALSA: usb-audio: Avoid false E-MU sample-rate notifications
ASoC: sdw_utils: cs42l43: allow spk component names to be combined
ASoC: qcom: x1e80100: limit speaker volumes
ALSA: hda/realtek - Add mute LED support for HP Victus 15-fa2xxx
ALSA: pcmtest: Fix resource leaks in module init error paths
ALSA: usb-audio/line6: Add support for POD HD PRO
ALSA: hda/realtek: Add LED fixup for HP EliteBook 6 G2a Laptops
ASoC: SDCA: Fix reading of mipi-sdca-control-deferrable
regmap: sdw-mbq: Allow defers on undeferrable controls
Revert "ALSA: usb-audio: Add quirk for SmartlinkTechnology M01"
ALSA: als4000: Fix capture trigger chip->mode race
ALSA: core: Fix potential data race at fasync handling
ALSA: hda/tas2781: Fix sound abnormal issue on some SPI device
ALSA: hda/realtek: add quirk for Acer Nitro 16 AN16-41
ALSA: caiaq: Fix control_put() result and cache rollback
ALSA: pcmtest: fix reference leak on failed device registration
...
Linus Torvalds [Fri, 24 Apr 2026 18:44:52 +0000 (11:44 -0700)]
Merge tag 'drm-fixes-2026-04-24' of https://gitlab.freedesktop.org/drm/kernel
Pull more drm fixes from Dave Airlie:
"These are the regular fixes that have built up over last couple of
weeks, all pretty minor and spread all over.
atomic:
- raise the vblank timeout to avoid it on virtual drivers
- fix colorop duplication
bridge:
- stm_lvds: state check fix
- dw-mipi-dsi: bridge reference leak fix
panel:
- visionx-rm69299: init fix
dma-fence:
- fix sparse warning
dma-buf:
- UAF fix
panthor:
- mapping fix
arcgpu:
- device_node reference leak fix
nouveau:
- memory leak in error path fix
- overflow in reloc path for old hw fix
hv:
- Kconfig fix
v3d:
- infinite loop fix"
* tag 'drm-fixes-2026-04-24' of https://gitlab.freedesktop.org/drm/kernel:
drm/nouveau: fix u32 overflow in pushbuf reloc bounds check
MAINTAINERS: split hisilicon maintenance and add Yongbang Shi for hibmc-drm matainers
drm/v3d: Reject empty multisync extension to prevent infinite loop
drm/panel: visionox-rm69299: Make use of prepare_prev_first
drm/drm_atomic: duplicate colorop states if plane color pipeline in use
drm/nouveau: fix nvkm_device leak on aperture removal failure
hv: Select CONFIG_SYSFB only for CONFIG_HYPERV_VMBUS
dma-fence: Silence sparse warning in dma_fence_describe
drm/bridge: dw-mipi-dsi: Fix bridge leak when host attach fails
drm/arcpgu: fix device node leak
drm/panthor: Fix outdated function documentation
drm/panthor: Extend VM locked region for remap case to be a superset
dma-buf: fix UAF in dma_buf_put() tracepoint
drm/bridge: stm_lvds: Do not fail atomic_check on disabled connector
drm/atomic: Increase timeout in drm_atomic_helper_wait_for_vblanks()
Linus Torvalds [Fri, 24 Apr 2026 18:33:23 +0000 (11:33 -0700)]
Merge tag 'drm-next-2026-04-24' of https://gitlab.freedesktop.org/drm/kernel
Pull drm next fixes from Dave Airlie:
"This is the first of two fixes for the merge PRs, the other is based
on 7.0 branch. This mostly AMD fixes, a couple of weeks of backlog
built up and this weeks. The main complaint I've seen is some boot
warnings around the FP code handling which this should fix. Otherwise
a single rcar-du and a single i915 fix.
amdgpu:
- SMU 14 fixes
- Partition fixes
- SMUIO 15.x fix
- SR-IOV fixes
- JPEG fix
- PSP 15.x fix
- NBIF fix
- Devcoredump fixes
- DPC fix
- RAS fixes
- Aldebaran smu fix
- IP discovery fix
- SDMA 7.1 fix
- Runtime pm fix
- MES 12.1 fix
- DML2 fixes
- DCN 4.2 fixes
- YCbCr fixes
- Freesync fixes
- ISM fixes
- Overlay cursor fix
- DC FP fixes
- UserQ locking fixes
- DC idle state manager fix
- ASPM fix
- GPUVM SVM fix
- DCE 6 fix
amdkfd:
- Fix memory clear handling
- num_of_nodes bounds check fix
i915:
- Fix uninitialized variable in the alignment loop [psr]
rcar-du:
- fix NULL-ptr crash"
* tag 'drm-next-2026-04-24' of https://gitlab.freedesktop.org/drm/kernel: (75 commits)
drm/amdkfd: Add upper bound check for num_of_nodes
drm: rcar-du: Fix crash when no CMM is available
drm/amd/display: Disable 10-bit truncation and dithering on DCE 6.x
drm/amdgpu: OR init_pte_flags into invalid leaf PTE updates
drm/amd: Adjust ASPM support quirk to cover more Intel hosts
drm/amd/display: Undo accidental fix revert in amdgpu_dm_ism.c
drm/i915/psr: Init variable to avoid early exit from et alignment loop
drm/amdgpu: drop userq fence driver refs out of fence process()
drm/amdgpu/userq: unpin and unref doorbell and wptr outside mutex
drm/amdgpu/userq: use pm_runtime_resume_and_get and fix err handling
drm/amdgpu/userq: unmap_helper dont return the queue state
drm/amdgpu/userq: unmap is to be called before freeing doorbell/wptr bo
drm/amdgpu/userq: hold root bo lock in caller of input_va_validate
drm/amdgpu/userq: caller to take reserv lock for vas_list_cleanup
drm/amdgpu/userq: create_mqd does not need userq_mutex
drm/amdgpu/userq: dont lock root bo with userq_mutex held
drm/amdgpu/userq: fix kerneldoc for amdgpu_userq_ensure_ev_fence
drm/amdgpu/userq: clean the VA mapping list for failed queue creation
drm/amdgpu/userq: avoid uneccessary locking in amdgpu_userq_create
drm/amd/display: Fix ISM teardown crash from NULL dc dereference
...
Linus Torvalds [Fri, 24 Apr 2026 17:14:29 +0000 (10:14 -0700)]
Merge tag 'locking-urgent-2026-04-24' of git://git./linux/kernel/git/tip/tip
Pull locking fixes from Ingo Molnar:
- Fix ww_mutex regression, which caused hangs/pauses in some DRM drivers
- Fix rtmutex proxy-rollback bug
* tag 'locking-urgent-2026-04-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/mutex: Fix ww_mutex wait_list operations
rtmutex: Use waiter::task instead of current in remove_waiter()
Linus Torvalds [Fri, 24 Apr 2026 17:05:42 +0000 (10:05 -0700)]
Merge tag 'x86-urgent-2026-04-24' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
- Prevent deadlock during shstk sigreturn (Rick Edgecombe)
- Disable FRED when PTI is forced on (Dave Hansen)
- Revert a CPA INVLPGB optimization that did not properly handle
discontiguous virtual addresses (Dave Hansen)
* tag 'x86-urgent-2026-04-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Revert INVLPGB optimization for set_memory code
x86/cpu: Disable FRED when PTI is forced on
x86/shstk: Prevent deadlock during shstk sigreturn
Linus Torvalds [Fri, 24 Apr 2026 17:00:37 +0000 (10:00 -0700)]
Merge tag 'riscv-for-linus-7.1-mw1' of git://git./linux/kernel/git/riscv/linux
Pull RISC-V updates from Paul Walmsley:
"There is one significant change outside arch/riscv in this pull
request: the addition of a set of KUnit tests for strlen(), strnlen(),
and strrchr().
Otherwise, the most notable changes are to add some RISC-V-specific
string function implementations, to remove XIP kernel support, to add
hardware error exception handling, and to optimize our runtime
unaligned access speed testing.
A few comments on the motivation for removing XIP support. It's been
broken in the RISC-V kernel for months. The code is not easy to
maintain. Furthermore, for XIP support to truly be useful for RISC-V,
we think that compile-time feature switches would need to be added for
many of the RISC-V ISA features and microarchitectural properties that
are currently implemented with runtime patching. No one has stepped
forward to take responsibility for that work, so many of us think it's
best to remove it until clear use cases and champions emerge.
Summary:
- Add Kunit correctness testing and microbenchmarks for strlen(),
strnlen(), and strrchr()
- Add RISC-V-specific strnlen(), strchr(), strrchr() implementations
- Add hardware error exception handling
- Clean up and optimize our unaligned access probe code
- Enable HAVE_IOREMAP_PROT to be able to use generic_access_phys()
- Remove XIP kernel support
- Warn when addresses outside the vmemmap range are passed to
vmemmap_populate()
- Update the ACPI FADT revision check to warn if it's not at least
ACPI v6.6, which is when key RISC-V-specific tables were added to
the specification
- Increase COMMAND_LINE_SIZE to 2048 to match ARM64, x86, PowerPC,
etc.
- Make kaslr_offset() a static inline function, since there's no need
for it to show up in the symbol table
- Add KASLR offset and SATP to the VMCOREINFO ELF notes to improve
kdump support
- Add Makefile cleanup rule for vdso_cfi copied source files, and add
a .gitignore for the build artifacts in that directory
- Remove some redundant ifdefs that check Kconfig macros
- Add missing SPDX license tag to the CFI selftest
- Simplify UTS_MACHINE assignment in the RISC-V Makefile
- Clarify some unclear comments and remove some superfluous comments
- Fix various English typos across the RISC-V codebase"
* tag 'riscv-for-linus-7.1-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (31 commits)
riscv: Remove support for XIP kernel
riscv: Reuse compare_unaligned_access() in check_vector_unaligned_access()
riscv: Split out compare_unaligned_access()
riscv: Reuse measure_cycles() in check_vector_unaligned_access()
riscv: Split out measure_cycles() for reuse
riscv: Clean up & optimize unaligned scalar access probe
riscv: lib: add strrchr() implementation
riscv: lib: add strchr() implementation
riscv: lib: add strnlen() implementation
lib/string_kunit: extend benchmarks to strnlen() and chr searches
lib/string_kunit: add performance benchmark for strlen()
lib/string_kunit: add correctness test for strrchr()
lib/string_kunit: add correctness test for strnlen()
lib/string_kunit: add correctness test for strlen()
riscv: vdso_cfi: Add .gitignore for build artifacts
riscv: vdso_cfi: Add clean rule for copied sources
riscv: enable HAVE_IOREMAP_PROT
riscv: mm: WARN_ON() for bad addresses in vmemmap_populate()
riscv: acpi: update FADT revision check to 6.6
riscv: add hardware error trap handler support
...
Linus Torvalds [Fri, 24 Apr 2026 16:54:45 +0000 (09:54 -0700)]
Merge tag 'loongarch-7.1' of git://git./linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch updates from Huacai Chen:
- Adjust build infrastructure for 32BIT/64BIT
- Add HIGHMEM (PKMAP and FIX_KMAP) support
- Show and handle CPU vulnerabilites correctly
- Batch the icache maintenance for jump_label
- Add more atomic instructions support for BPF JIT
- Add more features (e.g. fsession) support for BPF trampoline
- Some bug fixes and other small changes
* tag 'loongarch-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (21 commits)
selftests/bpf: Enable CAN_USE_LOAD_ACQ_STORE_REL for LoongArch
LoongArch: BPF: Add fsession support for trampolines
LoongArch: BPF: Introduce emit_store_stack_imm64() helper
LoongArch: BPF: Support up to 12 function arguments for trampoline
LoongArch: BPF: Support small struct arguments for trampoline
LoongArch: BPF: Open code and remove invoke_bpf_mod_ret()
LoongArch: BPF: Support load-acquire and store-release instructions
LoongArch: BPF: Support 8 and 16 bit read-modify-write instructions
LoongArch: BPF: Add the default case in emit_atomic() and rename it
LoongArch: Define instruction formats for AM{SWAP/ADD}.{B/H} and DBAR
LoongArch: Batch the icache maintenance for jump_label
LoongArch: Add flush_icache_all()/local_flush_icache_all()
LoongArch: Add spectre boundry for syscall dispatch table
LoongArch: Show CPU vulnerabilites correctly
LoongArch: Make arch_irq_work_has_interrupt() true only if IPI HW exist
LoongArch: Use get_random_canary() for stack canary init
LoongArch: Improve the logging of disabling KASLR
LoongArch: Align FPU register state to 32 bytes
LoongArch: Handle CONFIG_32BIT in syscall_get_arch()
LoongArch: Add HIGHMEM (PKMAP and FIX_KMAP) support
...
Linus Torvalds [Fri, 24 Apr 2026 16:41:58 +0000 (09:41 -0700)]
Merge tag 'net-deletions' of git://git./linux/kernel/git/netdev/net-next
Pull networking deletions from Jakub Kicinski:
"Delete some obsolete networking code
Old code like amateur radio and NFC have long been a burden to core
networking developers. syzbot loves to find bugs in BKL-era code, and
noobs try to fix them.
If we want to have a fighting chance of surviving the LLM-pocalypse
this code needs to find a dedicated owner or get deleted. We've talked
about these deletions multiple times in the past and every time
someone wanted the code to stay. It is never very clear to me how many
of those people actually use the code vs are just nostalgic to see it
go. Amateur radio did have occasional users (or so I think) but most
users switched to user space implementations since its all super slow
stuff. Nobody stepped up to maintain the kernel code.
We were lucky enough to find someone who wants to help with NFC so
we're giving that a chance. Let's try to put the rest of this code
behind us"
* tag 'net-deletions' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next:
drivers: net: 8390: wd80x3: Remove this driver
drivers: net: 8390: ultra: Remove this driver
drivers: net: 8390: AX88190: Remove this driver
drivers: net: fujitsu: fmvj18x: Remove this driver
drivers: net: smsc: smc91c92: Remove this driver
drivers: net: smsc: smc9194: Remove this driver
drivers: net: amd: nmclan: Remove this driver
drivers: net: amd: lance: Remove this driver
drivers: net: 3com: 3c589: Remove this driver
drivers: net: 3com: 3c574: Remove this driver
drivers: net: 3com: 3c515: Remove this driver
drivers: net: 3com: 3c509: Remove this driver
net: packetengines: remove obsolete yellowfin driver and vendor dir
net: packetengines: remove obsolete hamachi driver
net: remove unused ATM protocols and legacy ATM device drivers
net: remove ax25 and amateur radio (hamradio) subsystem
net: remove ISDN subsystem and Bluetooth CMTP
caif: remove CAIF NETWORK LAYER
Linus Torvalds [Fri, 24 Apr 2026 16:39:03 +0000 (09:39 -0700)]
Merge tag 'slab-for-7.1-fix' of git://git./linux/kernel/git/vbabka/slab
Pull slab fix from Vlastimil Babka:
- A stable fix for k(v)ealloc() where reallocating on a different node
or shrinking the object can result in either losing the original data
or a buffer overflow (Marco Elver)
* tag 'slab-for-7.1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
slub: fix data loss and overflow in krealloc()
Linus Torvalds [Fri, 24 Apr 2026 16:29:51 +0000 (09:29 -0700)]
Merge tag 'clang-fixes-7.1-1' of git://git./linux/kernel/git/nathan/linux
Pull Clang build fix from Nathan Chancellor:
- Wrap declaration and assignment of key_pass in certs/extract-cert.c
with '#ifdef' that matches its only usage to clear up an instance of
a new clang subwarning, -Wunused-but-set-global.
* tag 'clang-fixes-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/nathan/linux:
extract-cert: Wrap key_pass with '#ifdef USE_PKCS11_ENGINE'
Linus Torvalds [Fri, 24 Apr 2026 16:22:21 +0000 (09:22 -0700)]
Merge tag 'apparmor-pr-2026-04-23' of git://git./linux/kernel/git/jj/linux-apparmor
Pull apparmor updates from John Johansen:
"Cleanups
- Use sysfs_emit in param_get_{audit,mode}
- Remove redundant if check in sk_peer_get_label
- Replace memcpy + NUL termination with kmemdup_nul in do_setattr
Bug Fixes:
- Fix aa_dfa_unpack's error handling in aa_setup_dfa_engine
- Fix string overrun due to missing termination
- Fix wrong dentry in RENAME_EXCHANGE uid check
- fix unpack_tags to properly return error in failure cases
- fix dfa size check
- return error on namespace mismatch in verify_header
- use target task's context in apparmor_getprocattr()"
* tag 'apparmor-pr-2026-04-23' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor:
apparmor/lsm: Fix aa_dfa_unpack's error handling in aa_setup_dfa_engine
apparmor: Fix string overrun due to missing termination
apparmor: Fix wrong dentry in RENAME_EXCHANGE uid check
apparmor: fix unpack_tags to properly return error in failure cases
apparmor: fix dfa size check
apparmor: Use sysfs_emit in param_get_{audit,mode}
apparmor: Remove redundant if check in sk_peer_get_label
apparmor: Replace memcpy + NUL termination with kmemdup_nul in do_setattr
apparmor: return error on namespace mismatch in verify_header
apparmor: use target task's context in apparmor_getprocattr()
Sebastian Andrzej Siewior [Tue, 11 Nov 2025 15:54:38 +0000 (16:54 +0100)]
ARM: 9463/1: Allow to enable RT
All known issues have been adressed.
Allow to select RT.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Russell King (Oracle) [Fri, 24 Apr 2026 14:14:07 +0000 (15:14 +0100)]
Merge branches 'adfs', 'arm-fault-handling', 'fixes' and 'misc'
Brian Ruley [Wed, 15 Apr 2026 17:12:48 +0000 (18:12 +0100)]
ARM: 9472/1: fix race condition on PG_dcache_clean in __sync_icache_dcache()
This bug was already discovered and fixed for arm64 in
commit
588a513d3425 ("arm64: Fix race condition on PG_dcache_clean in
__sync_icache_dcache()").
Verified with added instrumentation to track dcache flushes in a ring
buffer, as shown by the (distilled) output:
kernel: SIGILL at
b6b80ac0 cpu 1 pid 32663 linux_pte=
8eff659f
hw_pte=
8eff6e7e young=1 exec=1
kernel: dcache flush START cpu0 pfn=8eff6 ts=
48629557020154
kernel: dcache flush SKIPPED cpu1 pfn=8eff6 ts=
48629557020154
kernel: dcache flush FINISH cpu0 pfn=8eff6 ts=
48629557036154
audisp-syslog: comm="journalctl" exe="/usr/bin/journalctl" sig=4 [...]
Discussions in the mailing list mentioned that arch/arm is also affected
but the fix was never applied to it [1][2]. Apply the change now, since
the race condition can cause sporadic SIGILL's and SEGV's especially
while under high memory pressure.
Link: https://lore.kernel.org/all/adzMOdySgMIePcue@willie-the-truck
Link: https://lore.kernel.org/all/20210514095001.13236-1-catalin.marinas@arm.com
Signed-off-by: Brian Ruley <brian.ruley@gehealthcare.com>
Reviewed-by: Will Deacon <will@kernel.org>
Cc: <stable@vger.kernel.org>
Fixes:
6012191aa9c6 ("ARM: 6380/1: Introduce __sync_icache_dcache() for VIPT caches")
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Dave Hansen [Tue, 21 Apr 2026 15:19:09 +0000 (08:19 -0700)]
x86/mm: Revert INVLPGB optimization for set_memory code
tl;dr: Revert an INVLPGB optimization that did not properly handle
discontiguous virtual addresses.
Full story:
I got a report from some graphics (i915) folks that bisected a
regression in their test suite to
86e6815b316e ("x86/mm: Change
cpa_flush() to call flush_kernel_range() directly"). There was a bit
of flip-flopping on the exact bisect, but the code here does seem
wrong to me. The i915 folks were calling set_pages_array_wc(), so
using the CPA_PAGES_ARRAY mode.
Basically, the 'struct cpa_data' can wrap up all kinds of page table
changes. Some of these are virtually contiguous, but some are very
much not which is one reason why there are ->vaddr and ->pages arrays.
86e6815b316e made the mistake of assuming that the virtual addresses
in the cpa_data are always contiguous. It got things right when neither
CPA_ARRAY/CPA_PAGES_ARRAY is used, but theoretically wrong when either
of those is used.
In the i915 case, it probably failed to flush some WB TLB entries and
install WC ones, leaving some data in the caches and not flushing it
out to where the device could see it. That eventually caused graphics
problems.
Revert the INVLPGB optimization. It can be reintroduced later, but it
will need to be a bit careful about the array modes.
Fixes:
86e6815b316ec ("x86/mm: Change cpa_flush() to call flush_kernel_range()")
Reported-by: Cui, Ling <ling.cui@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patch.msgid.link/20260421151909.6B3281C6@davehans-spike.ostc.intel.com
Thomas Weißschuh [Wed, 22 Apr 2026 15:10:27 +0000 (17:10 +0200)]
kbuild: Never respect CONFIG_WERROR / W=e to fixdep
The fixdep hostprog may be built multiple times during a single build.
Once during the configuration phase and later during the regular phase.
As only the regular build phase respects CONFIG_WERROR / W=e, the
compiler flags might change between the phases, leading to rebuilds.
Example, the rebuilds will happen twice on each invocation of the build:
$ make allyesconfig prepare
make[1]: Entering directory '/tmp/deleteme'
HOSTCC scripts/basic/fixdep
#
# No change to .config
#
HOSTCC scripts/basic/fixdep
DESCEND objtool
INSTALL libsubcmd_headers
make[1]: Leaving directory '/tmp/deleteme'
Fix the compilation flags used for scripts/basic/ before
scripts/Makefile.warn is evaluated to stop CONFIG_WERROR / W=e
influencing the fixdep build to avoid the spurious rebuilds.
Fixes:
7ded7d37e5f5 ("scripts/Makefile.extrawarn: Respect CONFIG_WERROR / W=e for hostprogs")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://patch.msgid.link/20260422-kbuild-scripts-basic-werror-v1-1-8c6912ff22e0@weissschuh.net
Signed-off-by: Nicolas Schier <nsc@kernel.org>
Dave Airlie [Fri, 24 Apr 2026 03:17:50 +0000 (13:17 +1000)]
Merge tag 'drm-misc-fixes-2026-04-23' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes
This week in drm-misc-fixes, we have:
- A patch to raise the vblank timeout to avoid it on virtual drivers
- a state check fix for stm_lvds
- a use-after-free fix for dma-buf
- a mapping fix for panthor
- a device_node reference leak fix for arcgpu
- a bridge reference leak fix for dw-mipi-dsi
- a sparse warning fix for dma-fence
- a kconfig fix for hv
- a memory leak fix for nouveau
- a fix to duplicate colorop when duplicating states
- a panel initialisation order fix for visionox-rm69299
- a fix to prevent an infinite loop for v3d
- an overflow fix for nouveau
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@redhat.com>
Link: https://patch.msgid.link/20260423-realistic-eager-reindeer-4dacf7@houat
Linus Torvalds [Fri, 24 Apr 2026 00:08:04 +0000 (17:08 -0700)]
Merge tag 'vfs-7.1-rc1.fixes' of git://git./linux/kernel/git/vfs/vfs
Pull vfs fixes from Christian Brauner:
- eventpoll: fix ep_remove() UAF and follow-up cleanup
- fs: aio: set VMA_DONTCOPY_BIT in mmap to fix NULL-pointer-dereference
error
- writeback: Fix use after free in inode_switch_wbs_work_fn()
- fuse: reject oversized dirents in page cache
- fs: aio: reject partial mremap to avoid Null-pointer-dereference
error
- nstree: fix func. parameter kernel-doc warnings
- fs: Handle multiply claimed blocks more gracefully with mmb
* tag 'vfs-7.1-rc1.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
eventpoll: drop vestigial epi->dying flag
eventpoll: drop dead bool return from ep_remove_epi()
eventpoll: refresh eventpoll_release() fast-path comment
eventpoll: move f_lock acquisition into ep_remove_file()
eventpoll: fix ep_remove struct eventpoll / struct file UAF
eventpoll: move epi_fget() up
eventpoll: rename ep_remove_safe() back to ep_remove()
eventpoll: drop vestigial __ prefix from ep_remove_{file,epi}()
eventpoll: kill __ep_remove()
eventpoll: split __ep_remove()
eventpoll: use hlist_is_singular_node() in __ep_remove()
fs: Handle multiply claimed blocks more gracefully with mmb
nstree: fix func. parameter kernel-doc warnings
fs: aio: reject partial mremap to avoid Null-pointer-dereference error
fuse: reject oversized dirents in page cache
writeback: Fix use after free in inode_switch_wbs_work_fn()
fs: aio: set VMA_DONTCOPY_BIT in mmap to fix NULL-pointer-dereference error
Linus Torvalds [Fri, 24 Apr 2026 00:04:18 +0000 (17:04 -0700)]
Merge tag 'v7.1-rc-part2-ksmbd-fixes' of git://git.samba.org/ksmbd
Pull more smb server updates from Steve French:
- move fs/smb/common/smbdirect to fs/smb/smbdirect
- change signature calc to use AES-CMAC library, simpler and faster
- invalid signature fix
- multichannel fix
- open create options fix
- fix durable handle leak
- cap maximum lock count to avoid potential denial of service
- four connection fixes: connection free and session destroy IDA fixes,
refcount fix, connection leak fix, max_connections off by one fix
- IPC validation fix
- fix out of bounds write in getting xattrs
- fix use after free in durable handle reconnect
- three ACL fixes: fix potential ACL overflow, harden num_aces check,
and fix minimum ACE size check
* tag 'v7.1-rc-part2-ksmbd-fixes' of git://git.samba.org/ksmbd:
smb: smbdirect: move fs/smb/common/smbdirect/ to fs/smb/smbdirect/
smb: server: stop sending fake security descriptors
ksmbd: scope conn->binding slowpath to bound sessions only
ksmbd: fix CreateOptions sanitization clobbering the whole field
ksmbd: fix durable fd leak on ClientGUID mismatch in durable v2 open
ksmbd: fix O(N^2) DoS in smb2_lock via unbounded LockCount
ksmbd: destroy async_ida in ksmbd_conn_free()
ksmbd: destroy tree_conn_ida in ksmbd_session_destroy()
ksmbd: Use AES-CMAC library for SMB3 signature calculation
ksmbd: reset rcount per connection in ksmbd_conn_wait_idle_sess_id()
ksmbd: fix out-of-bounds write in smb2_get_ea() EA alignment
ksmbd: use check_add_overflow() to prevent u16 DACL size overflow
ksmbd: fix use-after-free in smb2_open during durable reconnect
ksmbd: validate num_aces and harden ACE walk in smb_inherit_dacl()
smb: server: fix max_connections off-by-one in tcp accept path
ksmbd: require minimum ACE size in smb_check_perm_dacl()
ksmbd: validate response sizes in ipc_validate_msg()
smb: server: fix active_num_conn leak on transport allocation failure
Linus Torvalds [Thu, 23 Apr 2026 23:59:55 +0000 (16:59 -0700)]
Merge tag 'v7.1-rc1-part3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fixes from Steve French:
- Four bug fixes: OOB read in ioctl query info, 3 ACL fixes
- SMB1 Unix extensions mount fix
- Four crypto improvements: move to AES-CMAC library, simpler and faster
- Remove drop_dir_cache to avoid potential crash, and move to /procfs
- Seven SMB3.1.1 compression fixes
* tag 'v7.1-rc1-part3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
smb: client: Drop 'allocate_crypto' arg from smb*_calc_signature()
smb: client: Make generate_key() return void
smb: client: Remove obsolete cmac(aes) allocation
smb: client: Use AES-CMAC library for SMB3 signature calculation
smb: common: add SMB3_COMPRESS_MAX_ALGS
smb: client: compress: add code docs to lz77.c
smb: client: compress: LZ77 optimizations
smb: client: compress: increase LZ77_MATCH_MAX_DIST
smb: client: compress: fix counting in LZ77 match finding
smb: client: compress: fix buffer overrun in lz77_compress()
smb: client: scope end_of_dacl to CIFS_DEBUG2 use in parse_dacl
smb: client: fix (remove) drop_dir_cache module parameter
smb: client: require a full NFS mode SID before reading mode bits
smb: client: validate the whole DACL before rewriting it in cifsacl
smb: client: fix OOB read in smb2_ioctl_query_info QUERY_INFO path
cifs: update internal module version number
smb: client: compress: fix bad encoding on last LZ77 flag
smb: client: fix dir separator in SMB1 UNIX mounts
Linus Torvalds [Thu, 23 Apr 2026 23:50:42 +0000 (16:50 -0700)]
Merge tag 'net-7.1-rc1' of git://git./linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from Netfilter.
Steady stream of fixes. Last two weeks feel comparable to the two
weeks before the merge window. Lots of AI-aided bug discovery. A newer
big source is Sashiko/Gemini (Roman Gushchin's system), which points
out issues in existing code during patch review (maybe 25% of fixes
here likely originating from Sashiko). Nice thing is these are often
fixed by the respective maintainers, not drive-bys.
Current release - new code bugs:
- kconfig: MDIO_PIC64HPSC should depend on ARCH_MICROCHIP
Previous releases - regressions:
- add async ndo_set_rx_mode and switch drivers which we promised to
be called under the per-netdev mutex to it
- dsa: remove duplicate netdev_lock_ops() for conduit ethtool ops
- hv_sock: report EOF instead of -EIO for FIN
- vsock/virtio: fix MSG_PEEK calculation on bytes to copy
Previous releases - always broken:
- ipv6: fix possible UAF in icmpv6_rcv()
- icmp: validate reply type before using icmp_pointers
- af_unix: drop all SCM attributes for SOCKMAP
- netfilter: fix a number of bugs in the osf (OS fingerprinting)
- eth: intel: fix timestamp interrupt configuration for E825C
Misc:
- bunch of data-race annotations"
* tag 'net-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (148 commits)
rxrpc: Fix error handling in rxgk_extract_token()
rxrpc: Fix re-decryption of RESPONSE packets
rxrpc: Fix rxrpc_input_call_event() to only unshare DATA packets
rxrpc: Fix missing validation of ticket length in non-XDR key preparsing
rxgk: Fix potential integer overflow in length check
rxrpc: Fix conn-level packet handling to unshare RESPONSE packets
rxrpc: Fix potential UAF after skb_unshare() failure
rxrpc: Fix rxkad crypto unalignment handling
rxrpc: Fix memory leaks in rxkad_verify_response()
net: rds: fix MR cleanup on copy error
m68k: mvme147: Make me the maintainer
net: txgbe: fix firmware version check
selftests/bpf: check epoll readiness during reuseport migration
tcp: call sk_data_ready() after listener migration
vhost_net: fix sleeping with preempt-disabled in vhost_net_busy_poll()
ipv6: Cap TLV scan in ip6_tnl_parse_tlv_enc_lim
tipc: fix double-free in tipc_buf_append()
llc: Return -EINPROGRESS from llc_ui_connect()
ipv4: icmp: validate reply type before using icmp_pointers
selftests/net: packetdrill: cover RFC 5961 5.2 challenge ACK on both edges
...
Linus Torvalds [Thu, 23 Apr 2026 23:45:17 +0000 (16:45 -0700)]
Merge tag 'i2c-for-7.1-rc1-part2' of git://git./linux/kernel/git/wsa/linux
Pull more i2c updates from Wolfram Sang:
- cx92755: convert I2C bindings to DT schema
- mediatek: add optional bus power management during transfers
- pxa: handle early bus busy condition
- MAINTAINERS: update I2C RUST entry
* tag 'i2c-for-7.1-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
MAINTAINERS: add Rust I2C tree and update Igor Korotin's email
i2c: mediatek: add bus regulator control for power saving
dt-bindings: i2c: cnxt,cx92755-i2c: Convert to DT schema
i2c: pxa: handle 'Early Bus Busy' condition on Armada 3700
Linus Torvalds [Thu, 23 Apr 2026 23:40:03 +0000 (16:40 -0700)]
Merge tag 'xtensa-
20260422' of https://github.com/jcmvbkbc/linux-xtensa
Pull Xtensa updates from Max Filippov:
- use register_sys_off_handler(SYS_OFF_MODE_RESTART) instead of
the deprecated register_restart_handler()
- drop custom ucontext.h and reuse asm-generic ucontext.h
* tag 'xtensa-
20260422' of https://github.com/jcmvbkbc/linux-xtensa:
xtensa: uapi: Reuse asm-generic ucontext.h
xtensa: xtfpga: Use register_sys_off_handler(SYS_OFF_MODE_RESTART)
xtensa: xt2000: Use register_sys_off_handler(SYS_OFF_MODE_RESTART)
xtensa: ISS: Use register_sys_off_handler(SYS_OFF_MODE_RESTART)
Dave Airlie [Thu, 23 Apr 2026 23:17:31 +0000 (09:17 +1000)]
Merge tag 'amd-drm-fixes-7.1-2026-04-23' of https://gitlab.freedesktop.org/agd5f/linux into drm-next
amd-drm-fixes-7.1-2026-04-23:
amdgpu:
- DC idle state manager fix
- ASPM fix
- GPUVM SVM fix
- DCE 6 fix
amdkfd:
- num_of_nodes bounds check fix
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patch.msgid.link/20260423170129.2345978-1-alexander.deucher@amd.com
Dave Airlie [Thu, 23 Apr 2026 23:16:33 +0000 (09:16 +1000)]
Merge tag 'drm-misc-next-fixes-2026-04-23' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
Short summary of fixes pull:
rcar-du:
- fix NULL-ptr crash
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/20260423130852.GA114622@linux.fritz.box
Jakub Kicinski [Thu, 23 Apr 2026 21:54:20 +0000 (14:54 -0700)]
Merge branch 'remove-a-number-of-isa-and-pcmcia-ethernet-drivers'
Andrew Lunn says:
====================
Remove a number of ISA and PCMCIA Ethernet drivers
These old drivers have not been much of a Maintenance burden until
recently. Now there are more newbies using AI and fuzzers finding
issues, resulting in more work for Maintainers. Fixing these old
drivers make little sense, if it is not clear they have users.
These mostly ISA and PCMCIA Ethernet devices, mostly from the last
century, a couple from 2001 or 2002. It seems unlikely they are still
used. However, remove them one patch at a time so they can be brought
back if somebody still has the hardware, runs modern kernels and wants
to take up the roll of driver Maintainer.
====================
Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-0-08a5b59784d5@lunn.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Andrew Lunn [Wed, 22 Apr 2026 18:01:58 +0000 (13:01 -0500)]
drivers: net: 8390: wd80x3: Remove this driver
The wd80x3 was written by Donald Becker 1993 to 1994. It is an ISA
device, so unlikely to be used with modern kernels.
Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-15-08a5b59784d5@lunn.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Andrew Lunn [Wed, 22 Apr 2026 18:01:57 +0000 (13:01 -0500)]
drivers: net: 8390: ultra: Remove this driver
The ultra was written by Donald Becker 1993 to 1998. It is an ISA
device, so unlikely to be used with modern kernels.
Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-14-08a5b59784d5@lunn.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Andrew Lunn [Wed, 22 Apr 2026 18:01:55 +0000 (13:01 -0500)]
drivers: net: 8390: AX88190: Remove this driver
The ax88190 was written by David A. Hinds in 2001. It is an PCMCIA
device, so unlikely to be used with modern kernels.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-12-08a5b59784d5@lunn.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Andrew Lunn [Wed, 22 Apr 2026 18:01:54 +0000 (13:01 -0500)]
drivers: net: fujitsu: fmvj18x: Remove this driver
The fmvj18x was written by Shingo Fujimoto in 2002. It is an PCMCIA
device, so unlikely to be used with modern kernels.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-11-08a5b59784d5@lunn.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Andrew Lunn [Wed, 22 Apr 2026 18:01:51 +0000 (13:01 -0500)]
drivers: net: smsc: smc91c92: Remove this driver
The smc91c92 was written by David A Hinds in 1999. It is an PCMCIA
device, so unlikely to be used with modern kernels.
Remove the Documentation as well, since it refers to kernel versions
1.2.13 until 1.3.71 and FTP sites which no longer exist.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260422-v7-0-0-net-next-driver-removal-v1-v2-8-08a5b59784d5@lunn.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>