linux-2.6-microblaze.git
2 years agostaging: vchiq_core: introduce handle_poll
Stefan Wahren [Thu, 3 Jun 2021 15:50:05 +0000 (17:50 +0200)]
staging: vchiq_core: introduce handle_poll

The function slot_handler_func() has very deep indentations. Moving the
poll handling into separate function could improve the readability.
Use the return value to keep the poll_needed handling at the same place.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-17-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_connected: move EXPORT_SYMBOL below the right function
Stefan Wahren [Thu, 3 Jun 2021 15:50:04 +0000 (17:50 +0200)]
staging: vchiq_connected: move EXPORT_SYMBOL below the right function

It's more intuitive to have the EXPORT_SYMBOL() call below the matching
definition.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-16-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: store message id in local variable
Stefan Wahren [Thu, 3 Jun 2021 15:50:03 +0000 (17:50 +0200)]
staging: vchiq_core: store message id in local variable

Some queue_message() calls are still rather complex to read. So store
the message ids in a local variable in those cases.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-15-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: reduce indentation in parse_open
Stefan Wahren [Thu, 3 Jun 2021 15:50:02 +0000 (17:50 +0200)]
staging: vchiq_core: reduce indentation in parse_open

The function parse_open() already has bail out sections like fail_open.
So use a goto for the other error cases like payload size is too small
and listening service cannot be found. This avoids two indentation levels.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-14-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: introduce process_free_data_message
Stefan Wahren [Thu, 3 Jun 2021 15:50:01 +0000 (17:50 +0200)]
staging: vchiq_core: introduce process_free_data_message

This moves the special handling for data messages from process_free_queue()
into a new function. After this process_free_queue() has less extreme
indentation and should be easier to read.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-13-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_arm: tidy up service function naming
Stefan Wahren [Thu, 3 Jun 2021 15:50:00 +0000 (17:50 +0200)]
staging: vchiq_arm: tidy up service function naming

During a recent review Dan Carpenter reported that the function naming of
(un)lock_service is misleading. They are like wrapper around kref_get /
kref_put and don't have anything to do with locking. So use a name which
represent more the actual behavior. Btw add the vchiq prefix to avoid
possible name conflicts.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-12-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: simplify WARN_ON conditions
Stefan Wahren [Thu, 3 Jun 2021 15:49:59 +0000 (17:49 +0200)]
staging: vchiq_core: simplify WARN_ON conditions

During a recent review Dan Carpenter noticed a double negation in a WARN_ON.
But a quick search revealed more unnecessary complex WARN_ON conditions.
This change should simplify them.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-11-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: introduce message specific make macros
Stefan Wahren [Thu, 3 Jun 2021 15:49:58 +0000 (17:49 +0200)]
staging: vchiq_core: introduce message specific make macros

VCHIQ_MAKE_MSG isn't optimal because a lot of message types doesn't need
a parameter. So better define a macro for every message type which is used.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-10-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: use define for message type shift
Stefan Wahren [Thu, 3 Jun 2021 15:49:57 +0000 (17:49 +0200)]
staging: vchiq_core: use define for message type shift

Make it clear and use a define for shifting the message type.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-9-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: avoid precedence issues
Stefan Wahren [Thu, 3 Jun 2021 15:49:56 +0000 (17:49 +0200)]
staging: vchiq_core: avoid precedence issues

Add () around macro argument to avoid precedence issues

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-8-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: put spaces around operators
Stefan Wahren [Thu, 3 Jun 2021 15:49:55 +0000 (17:49 +0200)]
staging: vchiq_core: put spaces around operators

This fixes the checkpatch issues regarding missing spaces around operators.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-7-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: get the rid of vchiq_static_assert
Stefan Wahren [Thu, 3 Jun 2021 15:49:54 +0000 (17:49 +0200)]
staging: vchiq_core: get the rid of vchiq_static_assert

Use static_assert from the kernel instead of opencode it.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-6-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: get the rid of IS_POW2
Stefan Wahren [Thu, 3 Jun 2021 15:49:53 +0000 (17:49 +0200)]
staging: vchiq_core: get the rid of IS_POW2

The macro IS_POW2 is only used to ensure some size are powers of 2.
Better use BUILD_BUG_ON_NOT_POWER_OF_2 for this. Since this must be done
in a function, merge all these checks in a new function.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-5-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: move internals to C source
Stefan Wahren [Thu, 3 Jun 2021 15:49:52 +0000 (17:49 +0200)]
staging: vchiq_core: move internals to C source

There is no need to export those definitions, so keep them in the
source file.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-4-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_arm: introduce free_bulk_waiter
Stefan Wahren [Thu, 3 Jun 2021 15:49:51 +0000 (17:49 +0200)]
staging: vchiq_arm: introduce free_bulk_waiter

Avoid the copy & paste of freeing the bulk waiter and move it into a
separate function. Found by CPD.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-3-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: vchiq_core: fix logic in poll_services_of_group
Stefan Wahren [Thu, 3 Jun 2021 15:49:50 +0000 (17:49 +0200)]
staging: vchiq_core: fix logic in poll_services_of_group

Commit "staging: vchiq_core: avoid indention in poll_services_of_group"
tries to reduce the indention, but the parts regarding the third if statement
breaks the logic. So restore them and prevent vchiq_test from hanging during
the ping test.

Fixes: 2f440843a7d4 ("staging: vchiq_core: avoid indention in poll_services_of_group")
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1622735405-9980-2-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: mt7621-dts: review pcie overlay in 'gbpc1' dts file
Sergio Paracuellos [Fri, 4 Jun 2021 06:30:31 +0000 (08:30 +0200)]
staging: mt7621-dts: review pcie overlay in 'gbpc1' dts file

pcie node is being overlayed in 'gbpc1.dts' file requesting three
gpio reset pins for each pcie port. Gnubee only needs general
gpio 19 to properly reset and make all of them work. This pin
is already requested in the general 'mt7621.dtsi' file as well
as is the pinctrl pins. So we only need to enable the node
in the overlay and all the other stuff can be safely deleted.
Also, pin 8 is being requested for gpio-leds node and there
was an error on boot before this changes because of pin was
already assigned (EBUSY):

leds-gpio: probe of gpio-leds failed with error -16

With this changes this error has disappear and the board is
properly booting without any other regression.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20210604063031.13599-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: rtl8192u: fix spaces in r8192U_hw.h
Manikishan Ghantasala [Wed, 2 Jun 2021 19:33:32 +0000 (01:03 +0530)]
staging: rtl8192u: fix spaces in r8192U_hw.h

Fixed "please, no space before tabs" checkpatch warning.

Signed-off-by: Manikishan Ghantasala <manikishanghantasala@gmail.com>
Link: https://lore.kernel.org/r/20210602193334.11687-4-manikishanghantasala@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: rtl8192u: put parentheses on macros with complex values in r8192U_hw.h
Manikishan Ghantasala [Wed, 2 Jun 2021 19:33:31 +0000 (01:03 +0530)]
staging: rtl8192u: put parentheses on macros with complex values in r8192U_hw.h

Fix "Macros with complex values should be enclosed in parentheses" checkpatch error.

Signed-off-by: Manikishan Ghantasala <manikishanghantasala@gmail.com>
Link: https://lore.kernel.org/r/20210602193334.11687-3-manikishanghantasala@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: rtl8192u: r8192U_hw.h: fix spaces preferred around that '|' code style error
Manikishan Ghantasala [Wed, 2 Jun 2021 19:33:30 +0000 (01:03 +0530)]
staging: rtl8192u: r8192U_hw.h: fix spaces preferred around that '|' code style error

Fix "spaces preferred around that '|' " checkpatch CHECK.

Signed-off-by: Manikishan Ghantasala <manikishanghantasala@gmail.com>
Link: https://lore.kernel.org/r/20210602193334.11687-2-manikishanghantasala@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: rtl8188eu: Fix fall-through warnings for Clang
Gustavo A. R. Silva [Fri, 28 May 2021 20:06:50 +0000 (15:06 -0500)]
staging: rtl8188eu: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly adding multiple break statements instead
of just letting the code fall through to the next case.

Link: https://github.com/KSPP/linux/issues/115
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20210528200650.GA39289@embeddedor
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: rtl8188eu: remove dummy setfreq handler
Martin Kaiser [Sat, 29 May 2021 12:13:46 +0000 (14:13 +0200)]
staging: rtl8188eu: remove dummy setfreq handler

The setfreq handler contains only a debug print. It returns success
although the frequency wasn't set.

Remove this handler and inform callers that this driver does not
support setfreq.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210529121346.8422-3-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: rtl8188eu: remove dummy wext handlers
Martin Kaiser [Sat, 29 May 2021 12:13:45 +0000 (14:13 +0200)]
staging: rtl8188eu: remove dummy wext handlers

Remove the wext handlers that link to an empty dummy function.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210529121346.8422-2-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: rtl8188eu: use IW_HANDLER to declare wext handlers
Martin Kaiser [Sat, 29 May 2021 12:13:44 +0000 (14:13 +0200)]
staging: rtl8188eu: use IW_HANDLER to declare wext handlers

Use the IW_HANDLER macro to declare the handler functions for
wext ioctls.  We don't have to skip unused ioctl numbers manually.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210529121346.8422-1-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agoStaging: rtl8712: Cleanup coding style warning
Khoa Tran Minh [Tue, 1 Jun 2021 17:59:25 +0000 (17:59 +0000)]
Staging: rtl8712: Cleanup coding style warning

This patch fixes checkpatch warning about multiple line dereference.

Signed-off-by: Khoa Tran Minh <ktm8@posteo.de>
Link: https://lore.kernel.org/r/YLZ1fc7BsaTo+ixQ@rue.localhost
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: rtl8723bs: core: rtw_mlme_ext.c: remove deadcode
Yu Kuai [Mon, 31 May 2021 14:02:34 +0000 (22:02 +0800)]
staging: rtl8723bs: core: rtw_mlme_ext.c: remove deadcode

'CHECK_EVENT_SEQ' is not defined anywhere, remove the deadcode.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20210531140234.3352465-1-yukuai3@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: rtl8192u: remove the repeated declaration
Shaokun Zhang [Mon, 31 May 2021 07:37:58 +0000 (15:37 +0800)]
staging: rtl8192u: remove the repeated declaration

Functions 'ieee80211_stop_send_beacons' and 'notify_wx_assoc_event'
are declared twice in their header file, so remove the repeated
declaration.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Link: https://lore.kernel.org/r/1622446678-52652-1-git-send-email-zhangshaokun@hisilicon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agostaging: rtl8192u: Fix shadowed variable name
Thomas Bracht Laumann Jespersen [Thu, 27 May 2021 19:21:49 +0000 (21:21 +0200)]
staging: rtl8192u: Fix shadowed variable name

Fixes the following sparse warning:

drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c:798:32: warning: symbol 'tcb_desc' shadows an earlier one
drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c:550:24: originally declared here

Signed-off-by: Thomas Bracht Laumann Jespersen <t@laumann.xyz>
Link: https://lore.kernel.org/r/20210527192149.29686-1-t@laumann.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agoMerge 5.13-rc4 into staging-next
Greg Kroah-Hartman [Mon, 31 May 2021 07:42:06 +0000 (09:42 +0200)]
Merge 5.13-rc4 into staging-next

We need the staging/iio fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agoLinux 5.13-rc4
Linus Torvalds [Sun, 30 May 2021 21:58:25 +0000 (11:58 -1000)]
Linux 5.13-rc4

2 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Sun, 30 May 2021 04:24:00 +0000 (18:24 -1000)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "This is a bit larger than usual at rc4 time. The reason is due to
  Lee's work of fixing newly reported build warnings.

  The rest is fixes as usual"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (22 commits)
  MAINTAINERS: adjust to removing i2c designware platform data
  i2c: s3c2410: fix possible NULL pointer deref on read message after write
  i2c: mediatek: Disable i2c start_en and clear intr_stat brfore reset
  i2c: i801: Don't generate an interrupt on bus reset
  i2c: mpc: implement erratum A-004447 workaround
  powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P1010 i2c controllers
  powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers
  dt-bindings: i2c: mpc: Add fsl,i2c-erratum-a004447 flag
  i2c: busses: i2c-stm32f4: Remove incorrectly placed ' ' from function name
  i2c: busses: i2c-st: Fix copy/paste function misnaming issues
  i2c: busses: i2c-pnx: Provide descriptions for 'alg_data' data structure
  i2c: busses: i2c-ocores: Place the expected function names into the documentation headers
  i2c: busses: i2c-eg20t: Fix 'bad line' issue and provide description for 'msgs' param
  i2c: busses: i2c-designware-master: Fix misnaming of 'i2c_dw_init_master()'
  i2c: busses: i2c-cadence: Fix incorrectly documented 'enum cdns_i2c_slave_mode'
  i2c: busses: i2c-ali1563: File headers are not good candidates for kernel-doc
  i2c: muxes: i2c-arb-gpio-challenge: Demote non-conformant kernel-doc headers
  i2c: busses: i2c-nomadik: Fix formatting issue pertaining to 'timeout'
  i2c: sh_mobile: Use new clock calculation formulas for RZ/G2E
  i2c: I2C_HISI should depend on ACPI
  ...

2 years agoMerge tag 'seccomp-fixes-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 30 May 2021 04:16:09 +0000 (18:16 -1000)]
Merge tag 'seccomp-fixes-v5.13-rc4' of git://git./linux/kernel/git/kees/linux

Pull seccomp fixes from Kees Cook:
 "This fixes a hard-to-hit race condition in the addfd user_notif
  feature of seccomp, visible since v5.9.

  And a small documentation fix"

* tag 'seccomp-fixes-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  seccomp: Refactor notification handler to prepare for new semantics
  Documentation: seccomp: Fix user notification documentation

2 years agoMerge tag 'riscv-for-linus-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 30 May 2021 04:10:10 +0000 (18:10 -1000)]
Merge tag 'riscv-for-linus-5.13-rc4' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:
 "A handful of RISC-V related fixes:

   - avoid errors when the stack tracing code is tracing itself.

   - resurrect the memtest= kernel command line argument on RISC-V,
     which was briefly enabled during the merge window before a
     refactoring disabled it.

   - build fix and some warning cleanups"

* tag 'riscv-for-linus-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: kexec: Fix W=1 build warnings
  riscv: kprobes: Fix build error when MMU=n
  riscv: Select ARCH_USE_MEMTEST
  riscv: stacktrace: fix the riscv stacktrace when CONFIG_FRAME_POINTER enabled

2 years agoMerge tag 'xfs-5.13-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Linus Torvalds [Sun, 30 May 2021 03:47:19 +0000 (17:47 -1000)]
Merge tag 'xfs-5.13-fixes-3' of git://git./fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:
 "This week's pile mitigates some decades-old problems in how extent
  size hints interact with realtime volumes, fixes some failures in
  online shrink, and fixes a problem where directory and symlink
  shrinking on extremely fragmented filesystems could fail.

  The most user-notable change here is to point users at our (new) IRC
  channel on OFTC. Freedom isn't free, it costs folks like you and me;
  and if you don't kowtow, they'll expel everyone and take over your
  channel. (Ok, ok, that didn't fit the song lyrics...)

  Summary:

   - Fix a bug where unmapping operations end earlier than expected,
     which can cause chaos on multi-block directory and symlink shrink
     operations.

   - Fix an erroneous assert that can trigger if we try to transition a
     bmap structure from btree format to extents format with zero
     extents. This was exposed by xfs/538"

* tag 'xfs-5.13-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: bunmapi has unnecessary AG lock ordering issues
  xfs: btree format inode forks can have zero extents
  xfs: add new IRC channel to MAINTAINERS
  xfs: validate extsz hints against rt extent size when rtinherit is set
  xfs: standardize extent size hint validation
  xfs: check free AG space when making per-AG reservations

2 years agoseccomp: Refactor notification handler to prepare for new semantics
Sargun Dhillon [Mon, 17 May 2021 19:39:06 +0000 (12:39 -0700)]
seccomp: Refactor notification handler to prepare for new semantics

This refactors the user notification code to have a do / while loop around
the completion condition. This has a small change in semantic, in that
previously we ignored addfd calls upon wakeup if the notification had been
responded to, but instead with the new change we check for an outstanding
addfd calls prior to returning to userspace.

Rodrigo Campos also identified a bug that can result in addfd causing
an early return, when the supervisor didn't actually handle the
syscall [1].

[1]: https://lore.kernel.org/lkml/20210413160151.3301-1-rodrigo@kinvolk.io/

Fixes: 7cf97b125455 ("seccomp: Introduce addfd ioctl to seccomp user notifier")
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Acked-by: Tycho Andersen <tycho@tycho.pizza>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Tested-by: Rodrigo Campos <rodrigo@kinvolk.io>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210517193908.3113-3-sargun@sargun.me
2 years agoMerge tag 'thermal-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/therma...
Linus Torvalds [Sat, 29 May 2021 16:55:55 +0000 (06:55 -1000)]
Merge tag 'thermal-v5.13-rc4' of git://git./linux/kernel/git/thermal/linux

Pull thermal fixes from Daniel Lezcano:

 - Fix uninitialized error code value for the SPMI adc driver (Yang
   Yingliang)

 - Fix kernel doc warning (Yang Li)

 - Fix wrong read-write thermal trip point initialization (Srinivas
   Pandruvada)

* tag 'thermal-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux:
  thermal/drivers/qcom: Fix error code in adc_tm5_get_dt_channel_data()
  thermal/ti-soc-thermal: Fix kernel-doc
  thermal/drivers/intel: Initialize RW trip to THERMAL_TEMP_INVALID

2 years agoMerge tag 'char-misc-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregk...
Linus Torvalds [Sat, 29 May 2021 16:41:50 +0000 (06:41 -1000)]
Merge tag 'char-misc-5.13-rc4' of git://git./linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are some tiny char/misc driver fixes for 5.13-rc4.

  Nothing huge here, just some tiny fixes for reported issues:

   - two interconnect driver fixes

   - kgdb build warning fix for gcc-11

   - hgafb regression fix

   - soundwire driver fix

   - mei driver fix

  All have been in linux-next with no reported issues"

* tag 'char-misc-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  mei: request autosuspend after sending rx flow control
  kgdb: fix gcc-11 warnings harder
  video: hgafb: correctly handle card detect failure during probe
  soundwire: qcom: fix handling of qcom,ports-block-pack-mode
  interconnect: qcom: Add missing MODULE_DEVICE_TABLE
  interconnect: qcom: bcm-voter: add a missing of_node_put()

2 years agoMerge tag 'driver-core-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 29 May 2021 16:33:28 +0000 (06:33 -1000)]
Merge tag 'driver-core-5.13-rc4' of git://git./linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg KH:
 "Here are three small driver core / debugfs fixes for 5.13-rc4:

   - debugfs fix for incorrect "lockdown" mode for selinux accesses

   - two device link changes, one bugfix and one cleanup

  All of these have been in linux-next for over a week with no reported
  problems"

* tag 'driver-core-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  drivers: base: Reduce device link removal code duplication
  drivers: base: Fix device link removal
  debugfs: fix security_locked_down() call for SELinux

2 years agoMerge tag 'staging-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 29 May 2021 16:29:13 +0000 (06:29 -1000)]
Merge tag 'staging-5.13-rc4' of git://git./linux/kernel/git/gregkh/staging

Pull staging and IIO driver fixes from Greg KH:
 "Here are some small IIO and staging driver fixes for reported issues
  for 5.13-rc4.

  Nothing major here, tiny changes for reported problems, full details
  are in the shortlog if people are curious.

  All have been in linux-next for a while with no reported problems"

* tag 'staging-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  iio: adc: ad7793: Add missing error code in ad7793_setup()
  iio: adc: ad7923: Fix undersized rx buffer.
  iio: adc: ad7768-1: Fix too small buffer passed to iio_push_to_buffers_with_timestamp()
  iio: dac: ad5770r: Put fwnode in error case during ->probe()
  iio: gyro: fxas21002c: balance runtime power in error path
  staging: emxx_udc: fix loop in _nbu2ss_nuke()
  staging: iio: cdc: ad7746: avoid overwrite of num_channels
  iio: adc: ad7192: handle regulator voltage error first
  iio: adc: ad7192: Avoid disabling a clock that was never enabled.
  iio: adc: ad7124: Fix potential overflow due to non sequential channel numbers
  iio: adc: ad7124: Fix missbalanced regulator enable / disable on error.

2 years agoMerge tag 'tty-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Sat, 29 May 2021 16:25:16 +0000 (06:25 -1000)]
Merge tag 'tty-5.13-rc4' of git://git./linux/kernel/git/gregkh/tty

Pull tty / serial driver fixes from Greg KH:
 "Here are some small fixes for reported problems for tty and serial
  drivers for 5.13-rc4.

  They consist of:

   - 8250 bugfixes and new device support

   - lockdown security mode fixup

   - syzbot found problems fixed

   - 8250_omap fix for interrupt storm

   - revert of 8250_omap driver fix as it caused worse problem than the
     original issue

  All but the last patch have been in linux-next for a while, the last
  one is a revert of a problem found in linux-next with the 8250_omap
  driver change"

* tag 'tty-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  Revert "serial: 8250: 8250_omap: Fix possible interrupt storm"
  serial: 8250_pci: handle FL_NOIRQ board flag
  serial: rp2: use 'request_firmware' instead of 'request_firmware_nowait'
  serial: 8250_pci: Add support for new HPE serial device
  serial: 8250: 8250_omap: Fix possible interrupt storm
  serial: 8250: Use BIT(x) for UART_{CAP,BUG}_*
  serial: 8250: Add UART_BUG_TXRACE workaround for Aspeed VUART
  serial: 8250_dw: Add device HID for new AMD UART controller
  serial: sh-sci: Fix off-by-one error in FIFO threshold register setting
  serial: core: fix suspicious security_locked_down() call
  serial: tegra: Fix a mask operation that is always true

2 years agoMerge tag 'usb-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sat, 29 May 2021 16:11:21 +0000 (06:11 -1000)]
Merge tag 'usb-5.13-rc4' of git://git./linux/kernel/git/gregkh/usb

Pull USB / Thunderbolt fixes from Greg KH:
 "Here are a number of tiny USB and Thunderbolt driver fixes for
  5.13-rc4.

  They consist of:

   - thunderbolt fixes for some NVM bound issues

   - xhci fixes for reported problems

   - control-request fixups

   - documentation build warning fixes

   - new usb-serial driver device ids

   - typec bugfixes for reported issues

   - usbfs warning fixups (could be triggered from userspace)

   - other tiny fixes for reported problems.

  All of these have been in linux-next with no reported issues"

* tag 'usb-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (22 commits)
  xhci: Fix 5.12 regression of missing xHC cache clearing command after a Stall
  xhci: fix giving back URB with incorrect status regression in 5.12
  usb: gadget: udc: renesas_usb3: Fix a race in usb3_start_pipen()
  usb: typec: tcpm: Respond Not_Supported if no snk_vdo
  usb: typec: tcpm: Properly interrupt VDM AMS
  USB: trancevibrator: fix control-request direction
  usb: Restore the usb_header label
  usb: typec: tcpm: Use LE to CPU conversion when accessing msg->header
  usb: typec: ucsi: Clear pending after acking connector change
  usb: typec: mux: Fix matching with typec_altmode_desc
  misc/uss720: fix memory leak in uss720_probe
  usb: dwc3: gadget: Properly track pending and queued SG
  USB: usbfs: Don't WARN about excessively large memory allocations
  thunderbolt: usb4: Fix NVM read buffer bounds and offset issue
  thunderbolt: dma_port: Fix NVM read buffer bounds and offset issue
  usb: chipidea: udc: assign interrupt number to USB gadget structure
  usb: cdnsp: Fix lack of removing request from pending list.
  usb: cdns3: Fix runtime PM imbalance on error
  USB: serial: pl2303: add device id for ADLINK ND-6530 GC
  USB: serial: ti_usb_3410_5052: add startech.com device id
  ...

2 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sat, 29 May 2021 16:02:25 +0000 (06:02 -1000)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "ARM fixes:

   - Another state update on exit to userspace fix

   - Prevent the creation of mixed 32/64 VMs

   - Fix regression with irqbypass not restarting the guest on failed
     connect

   - Fix regression with debug register decoding resulting in
     overlapping access

   - Commit exception state on exit to usrspace

   - Fix the MMU notifier return values

   - Add missing 'static' qualifiers in the new host stage-2 code

  x86 fixes:

   - fix guest missed wakeup with assigned devices

   - fix WARN reported by syzkaller

   - do not use BIT() in UAPI headers

   - make the kvm_amd.avic parameter bool

  PPC fixes:

   - make halt polling heuristics consistent with other architectures

  selftests:

   - various fixes

   - new performance selftest memslot_perf_test

   - test UFFD minor faults in demand_paging_test"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (44 commits)
  selftests: kvm: fix overlapping addresses in memslot_perf_test
  KVM: X86: Kill off ctxt->ud
  KVM: X86: Fix warning caused by stale emulation context
  KVM: X86: Use kvm_get_linear_rip() in single-step and #DB/#BP interception
  KVM: x86/mmu: Fix comment mentioning skip_4k
  KVM: VMX: update vcpu posted-interrupt descriptor when assigning device
  KVM: rename KVM_REQ_PENDING_TIMER to KVM_REQ_UNBLOCK
  KVM: x86: add start_assignment hook to kvm_x86_ops
  KVM: LAPIC: Narrow the timer latency between wait_lapic_expire and world switch
  selftests: kvm: do only 1 memslot_perf_test run by default
  KVM: X86: Use _BITUL() macro in UAPI headers
  KVM: selftests: add shared hugetlbfs backing source type
  KVM: selftests: allow using UFFD minor faults for demand paging
  KVM: selftests: create alias mappings when using shared memory
  KVM: selftests: add shmem backing source type
  KVM: selftests: refactor vm_mem_backing_src_type flags
  KVM: selftests: allow different backing source types
  KVM: selftests: compute correct demand paging size
  KVM: selftests: simplify setup_demand_paging error handling
  KVM: selftests: Print a message if /dev/kvm is missing
  ...

2 years agoMerge tag 's390-5.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Sat, 29 May 2021 15:51:53 +0000 (05:51 -1000)]
Merge tag 's390-5.13-3' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Vasily Gorbik:
 "Fix races in vfio-ccw request handling"

* tag 's390-5.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  vfio-ccw: Serialize FSM IDLE state with I/O completion
  vfio-ccw: Reset FSM state to IDLE inside FSM
  vfio-ccw: Check initialized flag in cp_init()

2 years agoselftests: kvm: fix overlapping addresses in memslot_perf_test
Paolo Bonzini [Fri, 28 May 2021 19:10:58 +0000 (15:10 -0400)]
selftests: kvm: fix overlapping addresses in memslot_perf_test

vm_create allocates memory and maps it close to GPA.  This memory
is separate from what is allocated in subsequent calls to
vm_userspace_mem_region_add, so it is incorrect to pass the
test memory size to vm_create_default.  Just pass a small
fixed amount of memory which can be used later for page table,
otherwise GPAs are already allocated at MEM_GPA and the
test aborts.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 29 May 2021 00:47:48 +0000 (14:47 -1000)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Ten small fixes, all in drivers"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: target: qla2xxx: Wait for stop_phase1 at WWN removal
  scsi: hisi_sas: Drop free_irq() of devm_request_irq() allocated irq
  scsi: vmw_pvscsi: Set correct residual data length
  scsi: bnx2fc: Return failure if io_req is already in ABTS processing
  scsi: aic7xxx: Remove multiple definition of globals
  scsi: aic7xxx: Restore several defines for aic7xxx firmware build
  scsi: target: iblock: Fix smp_processor_id() BUG messages
  scsi: libsas: Use _safe() loop in sas_resume_port()
  scsi: target: tcmu: Fix xarray RCU warning
  scsi: target: core: Avoid smp_processor_id() in preemptible code

2 years agoMerge tag 'block-5.13-2021-05-28' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 29 May 2021 00:42:37 +0000 (14:42 -1000)]
Merge tag 'block-5.13-2021-05-28' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - NVMe pull request (Christoph):
      - fix a memory leak in nvme_cdev_add (Guoqing Jiang)
      - fix inline data size comparison in nvmet_tcp_queue_response (Hou
        Pu)
      - fix false keep-alive timeout when a controller is torn down
        (Sagi Grimberg)
      - fix a nvme-tcp Kconfig dependency (Sagi Grimberg)
      - short-circuit reconnect retries for FC (Hannes Reinecke)
      - decode host pathing error for connect (Hannes Reinecke)

 - MD pull request (Song):
      - Fix incorrect chunk boundary assert (Christoph)

 - Fix s390/dasd verification panic (Stefan)

* tag 'block-5.13-2021-05-28' of git://git.kernel.dk/linux-block:
  nvmet: fix false keep-alive timeout when a controller is torn down
  nvmet-tcp: fix inline data size comparison in nvmet_tcp_queue_response
  nvme-tcp: remove incorrect Kconfig dep in BLK_DEV_NVME
  md/raid5: remove an incorrect assert in in_chunk_boundary
  s390/dasd: add missing discipline function
  nvme-fabrics: decode host pathing error for connect
  nvme-fc: short-circuit reconnect retries
  nvme: fix potential memory leaks in nvme_cdev_add

2 years agoMerge tag 'io_uring-5.13-2021-05-28' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 29 May 2021 00:35:55 +0000 (14:35 -1000)]
Merge tag 'io_uring-5.13-2021-05-28' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:
 "A few minor fixes:

   - Fix an issue with hashed wait removal on exit (Zqiang, Pavel)

   - Fix a recent data race introduced in this series (Marco)"

* tag 'io_uring-5.13-2021-05-28' of git://git.kernel.dk/linux-block:
  io_uring: fix data race to avoid potential NULL-deref
  io-wq: Fix UAF when wakeup wqe in hash waitqueue
  io_uring/io-wq: close io-wq full-stop gap

2 years agoMerge tag 'drm-fixes-2021-05-29' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Sat, 29 May 2021 00:28:58 +0000 (14:28 -1000)]
Merge tag 'drm-fixes-2021-05-29' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Pretty quiet this week, couple of amdgpu, one i915, and a few misc otherwise.

  ttm:
   - prevent irrelevant swapout

  amdgpu:
   - MultiGPU fan fix
   - VCN powergating fixes

  amdkfd:
   - Fix SDMA register offset error

  meson:
   - fix shutdown crash

  i915:
   - Re-enable LTTPR non-transparent LT mode for DPCD_REV < 1.4"

* tag 'drm-fixes-2021-05-29' of git://anongit.freedesktop.org/drm/drm:
  drm/ttm: Skip swapout if ttm object is not populated
  drm/i915: Reenable LTTPR non-transparent LT mode for DPCD_REV<1.4
  drm/meson: fix shutdown crash when component not probed
  drm/amdgpu/jpeg3: add cancel_delayed_work_sync before power gate
  drm/amdgpu/jpeg2.5: add cancel_delayed_work_sync before power gate
  drm/amdgpu/jpeg2.0: add cancel_delayed_work_sync before power gate
  drm/amdgpu/vcn3: add cancel_delayed_work_sync before power gate
  drm/amdgpu/vcn2.5: add cancel_delayed_work_sync before power gate
  drm/amdgpu/vcn2.0: add cancel_delayed_work_sync before power gate
  drm/amdgpu/vcn1: add cancel_delayed_work_sync before power gate
  drm/amdkfd: correct sienna_cichlid SDMA RLC register offset error
  drm/amd/pm: correct MGpuFanBoost setting

2 years agoMerge tag 'perf-tools-fixes-for-v5.13-2021-05-28' of git://git.kernel.org/pub/scm...
Linus Torvalds [Sat, 29 May 2021 00:23:05 +0000 (14:23 -1000)]
Merge tag 'perf-tools-fixes-for-v5.13-2021-05-28' of git://git./linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Fix error checking of BPF prog attachment in 'perf stat'.

 - Fix getting maximum number of fds in the vendor events JSON parser.

 - Move debug initialization earlier, fixing a segfault in some cases.

 - Fix eventcode of power10 JSON events.

* tag 'perf-tools-fixes-for-v5.13-2021-05-28' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  perf vendor events powerpc: Fix eventcode of power10 JSON events
  perf stat: Fix error check for bpf_program__attach
  perf debug: Move debug initialization earlier
  perf jevents: Fix getting maximum number of fds

2 years agoMerge tag '5.13-rc4-smb3' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sat, 29 May 2021 00:15:47 +0000 (14:15 -1000)]
Merge tag '5.13-rc4-smb3' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Three SMB3 fixes.

  Two for stable, and the other fixes a problem pointed out with a
  recently added ioctl"

* tag '5.13-rc4-smb3' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: change format of CIFS_FULL_KEY_DUMP ioctl
  cifs: fix string declarations and assignments in tracepoints
  cifs: set server->cipher_type to AES-128-CCM for SMB3.0

2 years agoMerge tag 'nfs-for-5.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Fri, 28 May 2021 18:53:19 +0000 (08:53 -1000)]
Merge tag 'nfs-for-5.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
"Stable fixes:
   - Fix v4.0/v4.1 SEEK_DATA return -ENOTSUPP when set NFS_V4_2 config
   - Fix Oops in xs_tcp_send_request() when transport is disconnected
   - Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()

  Bugfixes:
   - Fix instances where signal_pending() should be fatal_signal_pending()
   - fix an incorrect limit in filelayout_decode_layout()
   - Fixes for the SUNRPC backlogged RPC queue
   - Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()
   - Revert commit 586a0787ce35 ("Clean up rpcrdma_prepare_readch()")"

* tag 'nfs-for-5.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  nfs: Remove trailing semicolon in macros
  xprtrdma: Revert 586a0787ce35
  NFSv4: Fix v4.0/v4.1 SEEK_DATA return -ENOTSUPP when set NFS_V4_2 config
  NFS: Clean up reset of the mirror accounting variables
  NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()
  NFS: Fix an Oopsable condition in __nfs_pageio_add_request()
  SUNRPC: More fixes for backlog congestion
  SUNRPC: Fix Oops in xs_tcp_send_request() when transport is disconnected
  NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
  SUNRPC in case of backlog, hand free slots directly to waiting task
  pNFS/NFSv4: Remove redundant initialization of 'rd_size'
  NFS: fix an incorrect limit in filelayout_decode_layout()
  fs/nfs: Use fatal_signal_pending instead of signal_pending

2 years agoMerge tag 'sound-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Fri, 28 May 2021 18:47:50 +0000 (08:47 -1000)]
Merge tag 'sound-5.13-rc4' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A slightly high volume at this time due to pending ASoC fixes.

  While there are a few generic simple-card fixes for regressions, most
  of the changes are device-specific fixes: ASoC Intel SOF, codec
  clocks, other codec / platform fixes as well as usual HD-audio and
  USB-audio"

* tag 'sound-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (37 commits)
  ALSA: hda/realtek: fix mute/micmute LEDs and speaker for HP Zbook Fury 17 G8
  ALSA: hda/realtek: fix mute/micmute LEDs and speaker for HP Zbook Fury 15 G8
  ALSA: hda/realtek: fix mute/micmute LEDs and speaker for HP Zbook G8
  ALSA: hda/realtek: fix mute/micmute LEDs for HP 855 G8
  ALSA: hda/realtek: Chain in pop reduction fixup for ThinkStation P340
  ALSA: usb-audio: scarlett2: snd_scarlett_gen2_controls_create() can be static
  ALSA: hda/realtek: the bass speaker can't output sound on Yoga 9i
  ALSA: hda/realtek: Headphone volume is controlled by Front mixer
  ALSA: usb-audio: scarlett2: Improve driver startup messages
  ALSA: usb-audio: scarlett2: Fix device hang with ehci-pci
  ALSA: usb-audio: fix control-request direction
  ASoC: qcom: lpass-cpu: Use optional clk APIs
  ASoC: cs35l33: fix an error code in probe()
  ASoC: SOF: Intel: hda: don't send DAI_CONFIG IPC for older firmware
  ASoC: fsl: fix SND_SOC_IMX_RPMSG dependency
  ASoC: cs42l52: Minor tidy up of error paths
  ASoC: cs35l32: Add missing regmap use_single config
  ASoC: cs35l34: Add missing regmap use_single config
  ASoC: cs42l73: Add missing regmap use_single config
  ASoC: cs53l30: Add missing regmap use_single config
  ...

2 years agoMerge tag 'clang-features-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 28 May 2021 18:31:48 +0000 (08:31 -1000)]
Merge tag 'clang-features-v5.13-rc4' of git://git./linux/kernel/git/kees/linux

Pull clang feature fixes from Kees Cook:

 - Correctly pass stack frame size checking under LTO (Nick Desaulniers)

 - Avoid CFI mismatches by checking initcall_t types (Marco Elver)

* tag 'clang-features-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  Makefile: LTO: have linker check -Wframe-larger-than
  init: verify that function is initcall_t at compile-time

2 years agoMerge tag 'mips-fixes_5.13_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips...
Linus Torvalds [Fri, 28 May 2021 18:24:13 +0000 (08:24 -1000)]
Merge tag 'mips-fixes_5.13_1' of git://git./linux/kernel/git/mips/linux

Pull MIPS fixes from Thomas Bogendoerfer:

 - fix function/preempt trace hangs

 - a few build fixes

* tag 'mips-fixes_5.13_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: Fix kernel hang under FUNCTION_GRAPH_TRACER and PREEMPT_TRACER
  MIPS: ralink: export rt_sysc_membase for rt2880_wdt.c
  MIPS: launch.h: add include guard to prevent build errors
  MIPS: alchemy: xxs1500: add gpio-au1000.h header file

2 years agoMerge tag 'kvmarm-fixes-5.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Paolo Bonzini [Fri, 28 May 2021 17:02:03 +0000 (13:02 -0400)]
Merge tag 'kvmarm-fixes-5.13-2' of git://git./linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 5.13, take #2

- Another state update on exit to userspace fix
- Prevent the creation of mixed 32/64 VMs

2 years agoKVM: X86: Kill off ctxt->ud
Wanpeng Li [Fri, 28 May 2021 00:01:37 +0000 (17:01 -0700)]
KVM: X86: Kill off ctxt->ud

ctxt->ud is consumed only by x86_decode_insn(), we can kill it off by
passing emulation_type to x86_decode_insn() and dropping ctxt->ud
altogether. Tracking that info in ctxt for literally one call is silly.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <1622160097-37633-2-git-send-email-wanpengli@tencent.com>

2 years agoKVM: X86: Fix warning caused by stale emulation context
Wanpeng Li [Fri, 28 May 2021 00:01:36 +0000 (17:01 -0700)]
KVM: X86: Fix warning caused by stale emulation context

Reported by syzkaller:

  WARNING: CPU: 7 PID: 10526 at linux/arch/x86/kvm//x86.c:7621 x86_emulate_instruction+0x41b/0x510 [kvm]
  RIP: 0010:x86_emulate_instruction+0x41b/0x510 [kvm]
  Call Trace:
   kvm_mmu_page_fault+0x126/0x8f0 [kvm]
   vmx_handle_exit+0x11e/0x680 [kvm_intel]
   vcpu_enter_guest+0xd95/0x1b40 [kvm]
   kvm_arch_vcpu_ioctl_run+0x377/0x6a0 [kvm]
   kvm_vcpu_ioctl+0x389/0x630 [kvm]
   __x64_sys_ioctl+0x8e/0xd0
   do_syscall_64+0x3c/0xb0
   entry_SYSCALL_64_after_hwframe+0x44/0xae

Commit 4a1e10d5b5d8 ("KVM: x86: handle hardware breakpoints during emulation())
adds hardware breakpoints check before emulation the instruction and parts of
emulation context initialization, actually we don't have the EMULTYPE_NO_DECODE flag
here and the emulation context will not be reused. Commit c8848cee74ff ("KVM: x86:
set ctxt->have_exception in x86_decode_insn()) triggers the warning because it
catches the stale emulation context has #UD, however, it is not during instruction
decoding which should result in EMULATION_FAILED. This patch fixes it by moving
the second part emulation context initialization into init_emulate_ctxt() and
before hardware breakpoints check. The ctxt->ud will be dropped by a follow-up
patch.

syzkaller source: https://syzkaller.appspot.com/x/repro.c?x=134683fdd00000

Reported-by: syzbot+71271244f206d17f6441@syzkaller.appspotmail.com
Fixes: 4a1e10d5b5d8 (KVM: x86: handle hardware breakpoints during emulation)
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <1622160097-37633-1-git-send-email-wanpengli@tencent.com>

2 years agoKVM: X86: Use kvm_get_linear_rip() in single-step and #DB/#BP interception
Yuan Yao [Wed, 26 May 2021 06:38:28 +0000 (14:38 +0800)]
KVM: X86: Use kvm_get_linear_rip() in single-step and #DB/#BP interception

The kvm_get_linear_rip() handles x86/long mode cases well and has
better readability, __kvm_set_rflags() also use the paired
function kvm_is_linear_rip() to check the vcpu->arch.singlestep_rip
set in kvm_arch_vcpu_ioctl_set_guest_debug(), so change the
"CS.BASE + RIP" code in kvm_arch_vcpu_ioctl_set_guest_debug() and
handle_exception_nmi() to this one.

Signed-off-by: Yuan Yao <yuan.yao@intel.com>
Message-Id: <20210526063828.1173-1-yuan.yao@linux.intel.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoDocumentation: seccomp: Fix user notification documentation
Sargun Dhillon [Mon, 17 May 2021 19:39:05 +0000 (12:39 -0700)]
Documentation: seccomp: Fix user notification documentation

The documentation had some previously incorrect information about how
userspace notifications (and responses) were handled due to a change
from a previously proposed patchset.

Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Acked-by: Tycho Andersen <tycho@tycho.pizza>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Fixes: 6a21cc50f0c7 ("seccomp: add a return code to trap to userspace")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210517193908.3113-2-sargun@sargun.me
2 years agoMAINTAINERS: adjust to removing i2c designware platform data
Lukas Bulwahn [Mon, 19 Apr 2021 06:18:09 +0000 (08:18 +0200)]
MAINTAINERS: adjust to removing i2c designware platform data

Commit 5a517b5bf687 ("i2c: designware: Get rid of legacy platform data")
removes ./include/linux/platform_data/i2c-designware.h, but misses to
adjust the SYNOPSYS DESIGNWARE I2C DRIVER section in MAINTAINERS.

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains:

  warning: no file matches F: include/linux/platform_data/i2c-designware.h

Remove the file entry to this removed file as well.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoperf vendor events powerpc: Fix eventcode of power10 JSON events
Kajol Jain [Tue, 25 May 2021 06:37:23 +0000 (12:07 +0530)]
perf vendor events powerpc: Fix eventcode of power10 JSON events

Fixed the eventcode values in the power10 JSON event files to prepend
"0x" since these are hexadecimal values.

The patch also changes the event description of the PM_EXEC_STALL_LOAD_FINISH
and PM_EXEC_STALL_NTC_FLUSH event and move some events to correct files.

Fixes: 32daa5d7899e ("perf vendor events: Initial JSON/events list for power10 platform")
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Reviewed-by: Paul A. Clarke <pc@us.ibm.com>
Tested-by: Nageswara R Sastry <rnsastry@linux.ibm.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lore.kernel.org/lkml/20210525063723.1191514-1-kjain@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoRevert "serial: 8250: 8250_omap: Fix possible interrupt storm"
Greg Kroah-Hartman [Fri, 28 May 2021 08:58:49 +0000 (10:58 +0200)]
Revert "serial: 8250: 8250_omap: Fix possible interrupt storm"

This reverts commit 31fae7c8b18c3f8029a2a5dce97a3182c1a167a0.

Tony writes:
I just noticed this causes the following regression in Linux
next when pressing a key on uart console after boot at least on
omap3. This seems to happen on serial_port_in(port, UART_RX) in
the quirk handling.

So let's drop this.

Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/YLCCJzkkB4N7LTQS@atomide.com
Fixes: 31fae7c8b18c ("serial: 8250: 8250_omap: Fix possible interrupt storm")
Reported-by: Tony Lindgren <tony@atomide.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agoi2c: s3c2410: fix possible NULL pointer deref on read message after write
Krzysztof Kozlowski [Wed, 26 May 2021 12:39:37 +0000 (08:39 -0400)]
i2c: s3c2410: fix possible NULL pointer deref on read message after write

Interrupt handler processes multiple message write requests one after
another, till the driver message queue is drained.  However if driver
encounters a read message without preceding START, it stops the I2C
transfer as it is an invalid condition for the controller.  At least the
comment describes a requirement "the controller forces us to send a new
START when we change direction".  This stop results in clearing the
message queue (i2c->msg = NULL).

The code however immediately jumped back to label "retry_write" which
dereferenced the "i2c->msg" making it a possible NULL pointer
dereference.

The Coverity analysis:
1. Condition !is_msgend(i2c), taking false branch.
   if (!is_msgend(i2c)) {

2. Condition !is_lastmsg(i2c), taking true branch.
   } else if (!is_lastmsg(i2c)) {

3. Condition i2c->msg->flags & 1, taking true branch.
   if (i2c->msg->flags & I2C_M_RD) {

4. write_zero_model: Passing i2c to s3c24xx_i2c_stop, which sets i2c->msg to NULL.
   s3c24xx_i2c_stop(i2c, -EINVAL);

5. Jumping to label retry_write.
   goto retry_write;

6. var_deref_model: Passing i2c to is_msgend, which dereferences null i2c->msg.
   if (!is_msgend(i2c)) {"

All previous calls to s3c24xx_i2c_stop() in this interrupt service
routine are followed by jumping to end of function (acknowledging
the interrupt and returning).  This seems a reasonable choice also here
since message buffer was entirely emptied.

Addresses-Coverity: Explicit null dereferenced
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: mediatek: Disable i2c start_en and clear intr_stat brfore reset
Qii Wang [Thu, 27 May 2021 12:04:04 +0000 (20:04 +0800)]
i2c: mediatek: Disable i2c start_en and clear intr_stat brfore reset

The i2c controller driver do dma reset after transfer timeout,
but sometimes dma reset will trigger an unexpected DMA_ERR irq.
It will cause the i2c controller to continuously send interrupts
to the system and cause soft lock-up. So we need to disable i2c
start_en and clear intr_stat to stop i2c controller before dma
reset when transfer timeout.

Fixes: aafced673c06("i2c: mediatek: move dma reset before i2c reset")
Signed-off-by: Qii Wang <qii.wang@mediatek.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoMerge tag 'drm-intel-fixes-2021-05-27' of ssh://git.freedesktop.org/git/drm/drm-intel...
Dave Airlie [Fri, 28 May 2021 03:28:18 +0000 (13:28 +1000)]
Merge tag 'drm-intel-fixes-2021-05-27' of ssh://git.freedesktop.org/git/drm/drm-intel into drm-fixes

drm/i915 fixes for v5.13-rc4:
- Re-enable LTTPR non-transparent LT mode for DPCD_REV<1.4

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/875yz4bnmj.fsf@intel.com
2 years agoMerge tag 'drm-misc-fixes-2021-05-27' of ssh://git.freedesktop.org/git/drm/drm-misc...
Dave Airlie [Fri, 28 May 2021 03:24:25 +0000 (13:24 +1000)]
Merge tag 'drm-misc-fixes-2021-05-27' of ssh://git.freedesktop.org/git/drm/drm-misc into drm-fixes

A fix in meson for a crash at shutdown and one for TTM to prevent
irrelevant swapout

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210527120828.3w7f53krzkslc4ii@gilmour
2 years agoperf stat: Fix error check for bpf_program__attach
Namhyung Kim [Thu, 27 May 2021 22:00:52 +0000 (15:00 -0700)]
perf stat: Fix error check for bpf_program__attach

It seems the bpf_program__attach() returns a negative error code instead
of a NULL pointer in case of error.

Fixes: 7fac83aaf2ee ("perf stat: Introduce 'bperf' to share hardware PMCs with BPF")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Link: http://lore.kernel.org/lkml/20210527220052.1657578-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoMerge tag 'amd-drm-fixes-5.13-2021-05-26' of https://gitlab.freedesktop.org/agd5f...
Dave Airlie [Thu, 27 May 2021 23:18:04 +0000 (09:18 +1000)]
Merge tag 'amd-drm-fixes-5.13-2021-05-26' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-5.13-2021-05-26:

amdgpu:
- MultiGPU fan fix
- VCN powergating fixes

amdkfd:
- Fix SDMA register offset error

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210527031831.4057-1-alexander.deucher@amd.com
2 years agoMerge branch 'for-5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis...
Linus Torvalds [Thu, 27 May 2021 22:01:26 +0000 (12:01 -1000)]
Merge branch 'for-5.13-fixes' of git://git./linux/kernel/git/dennis/percpu

Pull percpu fixes from Dennis Zhou:
 "This contains a cleanup to lib/percpu-refcount.c and an update to the
  MAINTAINERS file to more formally take over support for lib/percpu*"

* 'for-5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
  MAINTAINERS: Add lib/percpu* as part of percpu entry
  percpu_ref: Don't opencode percpu_ref_is_dying

2 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Thu, 27 May 2021 21:58:26 +0000 (11:58 -1000)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - Don't use contiguous or block mappings for the linear map when KFENCE
   is enabled.

 - Fix link in the arch_counter_enforce_ordering() comment.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: mm: don't use CON and BLK mapping if KFENCE is enabled
  arm64: Fix stale link in the arch_counter_enforce_ordering() comment

2 years agoMerge tag 'for-5.13/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 27 May 2021 21:54:36 +0000 (11:54 -1000)]
Merge tag 'for-5.13/dm-fixes-2' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - Fix DM verity target's 'require_signatures' module_param permissions.

 - Revert DM snapshot fix from v5.13-rc3 and then properly fix crash
   when an origin has no snapshots. This allows only the proper fix to
   go to stable@ (since the original fix was successfully dropped).

* tag 'for-5.13/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm snapshot: properly fix a crash when an origin has no snapshots
  dm snapshot: revert "fix a crash when an origin has no snapshots"
  dm verity: fix require_signatures module_param permissions

2 years agocifs: change format of CIFS_FULL_KEY_DUMP ioctl
Aurelien Aptel [Fri, 21 May 2021 15:19:28 +0000 (17:19 +0200)]
cifs: change format of CIFS_FULL_KEY_DUMP ioctl

Make CIFS_FULL_KEY_DUMP ioctl able to return variable-length keys.

* userspace needs to pass the struct size along with optional
  session_id and some space at the end to store keys
* if there is enough space kernel returns keys in the extra space and
  sets the length of each key via xyz_key_length fields

This also fixes the build error for get_user() on ARM.

Sample program:

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>

struct smb3_full_key_debug_info {
        uint32_t   in_size;
        uint64_t   session_id;
        uint16_t   cipher_type;
        uint8_t    session_key_length;
        uint8_t    server_in_key_length;
        uint8_t    server_out_key_length;
        uint8_t    data[];
        /*
         * return this struct with the keys appended at the end:
         * uint8_t session_key[session_key_length];
         * uint8_t server_in_key[server_in_key_length];
         * uint8_t server_out_key[server_out_key_length];
         */
} __attribute__((packed));

#define CIFS_IOCTL_MAGIC 0xCF
#define CIFS_DUMP_FULL_KEY _IOWR(CIFS_IOCTL_MAGIC, 10, struct smb3_full_key_debug_info)

void dump(const void *p, size_t len) {
        const char *hex = "0123456789ABCDEF";
        const uint8_t *b = p;
        for (int i = 0; i < len; i++)
                printf("%c%c ", hex[(b[i]>>4)&0xf], hex[b[i]&0xf]);
        putchar('\n');
}

int main(int argc, char **argv)
{
        struct smb3_full_key_debug_info *keys;
        uint8_t buf[sizeof(*keys)+1024] = {0};
        size_t off = 0;
        int fd, rc;

        keys = (struct smb3_full_key_debug_info *)&buf;
        keys->in_size = sizeof(buf);

        fd = open(argv[1], O_RDONLY);
        if (fd < 0)
                perror("open"), exit(1);

        rc = ioctl(fd, CIFS_DUMP_FULL_KEY, keys);
        if (rc < 0)
                perror("ioctl"), exit(1);

        printf("SessionId      ");
        dump(&keys->session_id, 8);
        printf("Cipher         %04x\n", keys->cipher_type);

        printf("SessionKey     ");
        dump(keys->data+off, keys->session_key_length);
        off += keys->session_key_length;

        printf("ServerIn Key   ");
        dump(keys->data+off, keys->server_in_key_length);
        off += keys->server_in_key_length;

        printf("ServerOut Key  ");
        dump(keys->data+off, keys->server_out_key_length);

        return 0;
}

Usage:

$ gcc -o dumpkeys dumpkeys.c

Against Windows Server 2020 preview (with AES-256-GCM support):

# mount.cifs //$ip/test /mnt -o "username=administrator,password=foo,vers=3.0,seal"
# ./dumpkeys /mnt/somefile
SessionId      0D 00 00 00 00 0C 00 00
Cipher         0002
SessionKey     AB CD CC 0D E4 15 05 0C 6F 3C 92 90 19 F3 0D 25
ServerIn Key   73 C6 6A C8 6B 08 CF A2 CB 8E A5 7D 10 D1 5B DC
ServerOut Key  6D 7E 2B A1 71 9D D7 2B 94 7B BA C4 F0 A5 A4 F8
# umount /mnt

With 256 bit keys:

# echo 1 > /sys/module/cifs/parameters/require_gcm_256
# mount.cifs //$ip/test /mnt -o "username=administrator,password=foo,vers=3.11,seal"
# ./dumpkeys /mnt/somefile
SessionId      09 00 00 00 00 0C 00 00
Cipher         0004
SessionKey     93 F5 82 3B 2F B7 2A 50 0B B9 BA 26 FB 8C 8B 03
ServerIn Key   6C 6A 89 B2 CB 7B 78 E8 04 93 37 DA 22 53 47 DF B3 2C 5F 02 26 70 43 DB 8D 33 7B DC 66 D3 75 A9
ServerOut Key  04 11 AA D7 52 C7 A8 0F ED E3 93 3A 65 FE 03 AD 3F 63 03 01 2B C0 1B D7 D7 E5 52 19 7F CC 46 B4

Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2 years agoi2c: i801: Don't generate an interrupt on bus reset
Jean Delvare [Tue, 25 May 2021 15:03:36 +0000 (17:03 +0200)]
i2c: i801: Don't generate an interrupt on bus reset

Now that the i2c-i801 driver supports interrupts, setting the KILL bit
in a attempt to recover from a timed out transaction triggers an
interrupt. Unfortunately, the interrupt handler (i801_isr) is not
prepared for this situation and will try to process the interrupt as
if it was signaling the end of a successful transaction. In the case
of a block transaction, this can result in an out-of-range memory
access.

This condition was reproduced several times by syzbot:
https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e
https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e
https://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e
https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb
https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a
https://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79

So disable interrupts while trying to reset the bus. Interrupts will
be enabled again for the following transaction.

Fixes: 636752bcb517 ("i2c-i801: Enable IRQ for SMBus transactions")
Reported-by: syzbot+b4d3fd1dfd53e90afd79@syzkaller.appspotmail.com
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: mpc: implement erratum A-004447 workaround
Chris Packham [Tue, 11 May 2021 21:20:52 +0000 (09:20 +1200)]
i2c: mpc: implement erratum A-004447 workaround

The P2040/P2041 has an erratum where the normal i2c recovery mechanism
does not work. Implement the alternative recovery mechanism documented
in the P2040 Chip Errata Rev Q.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agopowerpc/fsl: set fsl,i2c-erratum-a004447 flag for P1010 i2c controllers
Chris Packham [Tue, 11 May 2021 21:20:51 +0000 (09:20 +1200)]
powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P1010 i2c controllers

The i2c controllers on the P1010 have an erratum where the documented
scheme for i2c bus recovery will not work (A-004447). A different
mechanism is needed which is documented in the P1010 Chip Errata Rev L.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agopowerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers
Chris Packham [Tue, 11 May 2021 21:20:50 +0000 (09:20 +1200)]
powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers

The i2c controllers on the P2040/P2041 have an erratum where the
documented scheme for i2c bus recovery will not work (A-004447). A
different mechanism is needed which is documented in the P2040 Chip
Errata Rev Q (latest available at the time of writing).

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agodt-bindings: i2c: mpc: Add fsl,i2c-erratum-a004447 flag
Chris Packham [Tue, 11 May 2021 21:20:49 +0000 (09:20 +1200)]
dt-bindings: i2c: mpc: Add fsl,i2c-erratum-a004447 flag

Document the fsl,i2c-erratum-a004447 flag which indicates the presence
of an i2c erratum on some QorIQ SoCs.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: busses: i2c-stm32f4: Remove incorrectly placed ' ' from function name
Lee Jones [Thu, 20 May 2021 19:01:03 +0000 (20:01 +0100)]
i2c: busses: i2c-stm32f4: Remove incorrectly placed ' ' from function name

Fixes the following W=1 kernel build warning(s):

 drivers/i2c/busses/i2c-stm32f4.c:321: warning: expecting prototype for stm32f4_i2c_write_ byte()(). Prototype was for stm32f4_i2c_write_byte() instead

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: busses: i2c-st: Fix copy/paste function misnaming issues
Lee Jones [Thu, 20 May 2021 19:01:02 +0000 (20:01 +0100)]
i2c: busses: i2c-st: Fix copy/paste function misnaming issues

Fixes the following W=1 kernel build warning(s):

 drivers/i2c/busses/i2c-st.c:531: warning: expecting prototype for st_i2c_handle_write(). Prototype was for st_i2c_handle_read() instead
 drivers/i2c/busses/i2c-st.c:566: warning: expecting prototype for st_i2c_isr(). Prototype was for st_i2c_isr_thread() instead

Fix the "enmpty" typo while here.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: busses: i2c-pnx: Provide descriptions for 'alg_data' data structure
Lee Jones [Thu, 20 May 2021 19:01:00 +0000 (20:01 +0100)]
i2c: busses: i2c-pnx: Provide descriptions for 'alg_data' data structure

Fixes the following W=1 kernel build warning(s):

 drivers/i2c/busses/i2c-pnx.c:147: warning: Function parameter or member 'alg_data' not described in 'i2c_pnx_start'
 drivers/i2c/busses/i2c-pnx.c:147: warning: Excess function parameter 'adap' description in 'i2c_pnx_start'
 drivers/i2c/busses/i2c-pnx.c:202: warning: Function parameter or member 'alg_data' not described in 'i2c_pnx_stop'
 drivers/i2c/busses/i2c-pnx.c:202: warning: Excess function parameter 'adap' description in 'i2c_pnx_stop'
 drivers/i2c/busses/i2c-pnx.c:231: warning: Function parameter or member 'alg_data' not described in 'i2c_pnx_master_xmit'
 drivers/i2c/busses/i2c-pnx.c:231: warning: Excess function parameter 'adap' description in 'i2c_pnx_master_xmit'
 drivers/i2c/busses/i2c-pnx.c:301: warning: Function parameter or member 'alg_data' not described in 'i2c_pnx_master_rcv'
 drivers/i2c/busses/i2c-pnx.c:301: warning: Excess function parameter 'adap' description in 'i2c_pnx_master_rcv'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: busses: i2c-ocores: Place the expected function names into the documentation...
Lee Jones [Thu, 20 May 2021 19:00:59 +0000 (20:00 +0100)]
i2c: busses: i2c-ocores: Place the expected function names into the documentation headers

Fixes the following W=1 kernel build warning(s):

 drivers/i2c/busses/i2c-ocores.c:253: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
 drivers/i2c/busses/i2c-ocores.c:267: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
 drivers/i2c/busses/i2c-ocores.c:299: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
 drivers/i2c/busses/i2c-ocores.c:347: warning: expecting prototype for It handles an IRQ(). Prototype was for ocores_process_polling() instead

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: busses: i2c-eg20t: Fix 'bad line' issue and provide description for 'msgs' param
Lee Jones [Thu, 20 May 2021 19:00:57 +0000 (20:00 +0100)]
i2c: busses: i2c-eg20t: Fix 'bad line' issue and provide description for 'msgs' param

Fixes the following W=1 kernel build warning(s):

 drivers/i2c/busses/i2c-eg20t.c:151: warning: bad line:                          PCH i2c controller
 drivers/i2c/busses/i2c-eg20t.c:369: warning: Function parameter or member 'msgs' not described in 'pch_i2c_writebytes'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: busses: i2c-designware-master: Fix misnaming of 'i2c_dw_init_master()'
Lee Jones [Thu, 20 May 2021 19:00:56 +0000 (20:00 +0100)]
i2c: busses: i2c-designware-master: Fix misnaming of 'i2c_dw_init_master()'

Fixes the following W=1 kernel build warning(s):

 drivers/i2c/busses/i2c-designware-master.c:176: warning: expecting prototype for i2c_dw_init(). Prototype was for i2c_dw_init_master() instead

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: busses: i2c-cadence: Fix incorrectly documented 'enum cdns_i2c_slave_mode'
Lee Jones [Thu, 20 May 2021 19:00:55 +0000 (20:00 +0100)]
i2c: busses: i2c-cadence: Fix incorrectly documented 'enum cdns_i2c_slave_mode'

Fixes the following W=1 kernel build warning(s):

 drivers/i2c/busses/i2c-cadence.c:157: warning: expecting prototype for enum cdns_i2c_slave_mode. Prototype was for enum cdns_i2c_slave_state instead

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: busses: i2c-ali1563: File headers are not good candidates for kernel-doc
Lee Jones [Thu, 20 May 2021 19:00:52 +0000 (20:00 +0100)]
i2c: busses: i2c-ali1563: File headers are not good candidates for kernel-doc

Fixes the following W=1 kernel build warning(s):

 drivers/i2c/busses/i2c-ali1563.c:24: warning: expecting prototype for i2c(). Prototype was for ALI1563_MAX_TIMEOUT() instead

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: muxes: i2c-arb-gpio-challenge: Demote non-conformant kernel-doc headers
Lee Jones [Thu, 20 May 2021 19:00:51 +0000 (20:00 +0100)]
i2c: muxes: i2c-arb-gpio-challenge: Demote non-conformant kernel-doc headers

Fixes the following W=1 kernel build warning(s):

 drivers/i2c/muxes/i2c-arb-gpio-challenge.c:43: warning: Function parameter or member 'muxc' not described in 'i2c_arbitrator_select'
 drivers/i2c/muxes/i2c-arb-gpio-challenge.c:43: warning: Function parameter or member 'chan' not described in 'i2c_arbitrator_select'
 drivers/i2c/muxes/i2c-arb-gpio-challenge.c:86: warning: Function parameter or member 'muxc' not described in 'i2c_arbitrator_deselect'
 drivers/i2c/muxes/i2c-arb-gpio-challenge.c:86: warning: Function parameter or member 'chan' not described in 'i2c_arbitrator_deselect'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agoi2c: busses: i2c-nomadik: Fix formatting issue pertaining to 'timeout'
Lee Jones [Thu, 20 May 2021 19:00:50 +0000 (20:00 +0100)]
i2c: busses: i2c-nomadik: Fix formatting issue pertaining to 'timeout'

Fixes the following W=1 kernel build warning(s):

 drivers/i2c/busses/i2c-nomadik.c:184: warning: Function parameter or member 'timeout' not described in 'nmk_i2c_dev'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2 years agocifs: fix string declarations and assignments in tracepoints
Shyam Prasad N [Fri, 21 May 2021 06:35:52 +0000 (06:35 +0000)]
cifs: fix string declarations and assignments in tracepoints

We missed using the variable length string macros in several
tracepoints. Fixed them in this change.

There's probably more useful macros that we can use to print
others like flags etc. But I'll submit sepawrate patches for
those at a future date.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Cc: <stable@vger.kernel.org> # v5.12
Signed-off-by: Steve French <stfrench@microsoft.com>
2 years agocifs: set server->cipher_type to AES-128-CCM for SMB3.0
Aurelien Aptel [Fri, 21 May 2021 15:19:27 +0000 (17:19 +0200)]
cifs: set server->cipher_type to AES-128-CCM for SMB3.0

SMB3.0 doesn't have encryption negotiate context but simply uses
the SMB2_GLOBAL_CAP_ENCRYPTION flag.

When that flag is present in the neg response cifs.ko uses AES-128-CCM
which is the only cipher available in this context.

cipher_type was set to the server cipher only when parsing encryption
negotiate context (SMB3.1.1).

For SMB3.0 it was set to 0. This means cipher_type value can be 0 or 1
for AES-128-CCM.

Fix this by checking for SMB3.0 and encryption capability and setting
cipher_type appropriately.

Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
2 years agoMerge tag 'acpi-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Thu, 27 May 2021 18:39:05 +0000 (08:39 -1000)]
Merge tag 'acpi-5.13-rc4' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fix from Rafael Wysocki:
 "Fix a recent ACPI power management regression causing boot issues to
  occur on some systems due to attempts to turn off ACPI power resources
  that are already off (which should work according to the ACPI
  specification)"

* tag 'acpi-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: power: Refine turning off unused power resources

2 years agoMerge tag 'iommu-fixes-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 27 May 2021 18:06:36 +0000 (08:06 -1000)]
Merge tag 'iommu-fixes-v5.13-rc3' of git://git./linux/kernel/git/joro/iommu

Pull iommu fixes from Joerg Roedel:

 - Important fix for the AMD IOMMU driver in the recently added
   page-specific invalidation code to fix a calculation.

 - Fix a NULL-ptr dereference in the AMD IOMMU driver when a device
   switches domain types.

 - Fixes for the Intel VT-d driver to check for allocation failure and
   do correct cleanup.

 - Another fix for Intel VT-d to not allow supervisor page requests from
   devices when using second level page translation.

 - Add a MODULE_DEVICE_TABLE to the VIRTIO IOMMU driver

* tag 'iommu-fixes-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/vt-d: Fix sysfs leak in alloc_iommu()
  iommu/vt-d: Use user privilege for RID2PASID translation
  iommu/vt-d: Check for allocation failure in aux_detach_device()
  iommu/virtio: Add missing MODULE_DEVICE_TABLE
  iommu/amd: Fix wrong parentheses on page-specific invalidations
  iommu/amd: Clear DMA ops when switching domain

2 years agoperf debug: Move debug initialization earlier
Ian Rogers [Wed, 19 May 2021 16:44:47 +0000 (09:44 -0700)]
perf debug: Move debug initialization earlier

This avoids segfaults during option handlers that use pr_err. For
example, "perf --debug nopager list" segfaults before this change.

Fixes: 8abceacff87d (perf debug: Add debug_set_file function)
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20210519164447.2672030-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoafs: Fix the nlink handling of dir-over-dir rename
David Howells [Thu, 27 May 2021 10:24:33 +0000 (11:24 +0100)]
afs: Fix the nlink handling of dir-over-dir rename

Fix rename of one directory over another such that the nlink on the deleted
directory is cleared to 0 rather than being decremented to 1.

This was causing the generic/035 xfstest to fail.

Fixes: e49c7b2f6de7 ("afs: Build an abstraction around an "operation" concept")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Link: https://lore.kernel.org/r/162194384460.3999479.7605572278074191079.stgit@warthog.procyon.org.uk/
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoxfs: bunmapi has unnecessary AG lock ordering issues
Dave Chinner [Thu, 27 May 2021 15:11:01 +0000 (08:11 -0700)]
xfs: bunmapi has unnecessary AG lock ordering issues

large directory block size operations are assert failing because
xfs_bunmapi() is not completely removing fragmented directory blocks
like so:

XFS: Assertion failed: done, file: fs/xfs/libxfs/xfs_dir2.c, line: 677
....
Call Trace:
 xfs_dir2_shrink_inode+0x1a8/0x210
 xfs_dir2_block_to_sf+0x2ae/0x410
 xfs_dir2_block_removename+0x21a/0x280
 xfs_dir_removename+0x195/0x1d0
 xfs_rename+0xb79/0xc50
 ? avc_has_perm+0x8d/0x1a0
 ? avc_has_perm_noaudit+0x9a/0x120
 xfs_vn_rename+0xdb/0x150
 vfs_rename+0x719/0xb50
 ? __lookup_hash+0x6a/0xa0
 do_renameat2+0x413/0x5e0
 __x64_sys_rename+0x45/0x50
 do_syscall_64+0x3a/0x70
 entry_SYSCALL_64_after_hwframe+0x44/0xae

We are aborting the bunmapi() pass because of this specific chunk of
code:

                /*
                 * Make sure we don't touch multiple AGF headers out of order
                 * in a single transaction, as that could cause AB-BA deadlocks.
                 */
                if (!wasdel && !isrt) {
                        agno = XFS_FSB_TO_AGNO(mp, del.br_startblock);
                        if (prev_agno != NULLAGNUMBER && prev_agno > agno)
                                break;
                        prev_agno = agno;
                }

This is designed to prevent deadlocks in AGF locking when freeing
multiple extents by ensuring that we only ever lock in increasing
AG number order. Unfortunately, this also violates the "bunmapi will
always succeed" semantic that some high level callers depend on,
such as xfs_dir2_shrink_inode(), xfs_da_shrink_inode() and
xfs_inactive_symlink_rmt().

This AG lock ordering was introduced back in 2017 to fix deadlocks
triggered by generic/299 as reported here:

https://lore.kernel.org/linux-xfs/800468eb-3ded-9166-20a4-047de8018582@gmail.com/

This codebase is old enough that it was before we were defering all
AG based extent freeing from within xfs_bunmapi(). THat is, we never
actually lock AGs in xfs_bunmapi() any more - every non-rt based
extent free is added to the defer ops list, as is all BMBT block
freeing. And RT extents are not RT based, so there's no lock
ordering issues associated with them.

Hence this AGF lock ordering code is both broken and dead. Let's
just remove it so that the large directory block code works reliably
again.

Tested against xfs/538 and generic/299 which is the original test
that exposed the deadlocks that this code fixed.

Fixes: 5b094d6dac04 ("xfs: fix multi-AG deadlock in xfs_bunmapi")
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
2 years agoxfs: btree format inode forks can have zero extents
Dave Chinner [Thu, 27 May 2021 02:57:42 +0000 (19:57 -0700)]
xfs: btree format inode forks can have zero extents

xfs/538 is assert failing with this trace when testing with
directory block sizes of 64kB:

XFS: Assertion failed: !xfs_need_iread_extents(ifp), file: fs/xfs/libxfs/xfs_bmap.c, line: 608
....
Call Trace:
 xfs_bmap_btree_to_extents+0x2a9/0x470
 ? kmem_cache_alloc+0xe7/0x220
 __xfs_bunmapi+0x4ca/0xdf0
 xfs_bunmapi+0x1a/0x30
 xfs_dir2_shrink_inode+0x71/0x210
 xfs_dir2_block_to_sf+0x2ae/0x410
 xfs_dir2_block_removename+0x21a/0x280
 xfs_dir_removename+0x195/0x1d0
 xfs_remove+0x244/0x460
 xfs_vn_unlink+0x53/0xa0
 ? selinux_inode_unlink+0x13/0x20
 vfs_unlink+0x117/0x220
 do_unlinkat+0x1a2/0x2d0
 __x64_sys_unlink+0x42/0x60
 do_syscall_64+0x3a/0x70
 entry_SYSCALL_64_after_hwframe+0x44/0xae

This is a check to ensure that the extents have been read into
memory before we are doing a ifork btree manipulation. This assert
is bogus in the above case.

We have a fragmented directory block that has more extents in it
than can fit in extent format, so the inode data fork is in btree
format. xfs_dir2_shrink_inode() asks to remove all remaining 16
filesystem blocks from the inode so it can convert to short form,
and __xfs_bunmapi() removes all the extents. We now have a data fork
in btree format but have zero extents in the fork. This incorrectly
trips the xfs_need_iread_extents() assert because it assumes that an
empty extent btree means the extent tree has not been read into
memory yet. This is clearly not the case with xfs_bunmapi(), as it
has an explicit call to xfs_iread_extents() in it to pull the
extents into memory before it starts unmapping.

Also, the assert directly after this bogus one is:

ASSERT(ifp->if_format == XFS_DINODE_FMT_BTREE);

Which covers the context in which it is legal to call
xfs_bmap_btree_to_extents just fine. Hence we should just remove the
bogus assert as it is clearly wrong and causes a regression.

The returns the test behaviour to the pre-existing assert failure in
xfs_dir2_shrink_inode() that indicates xfs_bunmapi() has failed to
remove all the extents in the range it was asked to unmap.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
2 years agoiommu/vt-d: Fix sysfs leak in alloc_iommu()
Rolf Eike Beer [Tue, 25 May 2021 07:08:02 +0000 (15:08 +0800)]
iommu/vt-d: Fix sysfs leak in alloc_iommu()

iommu_device_sysfs_add() is called before, so is has to be cleaned on subsequent
errors.

Fixes: 39ab9555c2411 ("iommu: Add sysfs bindings for struct iommu_device")
Cc: stable@vger.kernel.org # 4.11.x
Signed-off-by: Rolf Eike Beer <eb@emlix.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/17411490.HIIP88n32C@mobilepool36.emlix.com
Link: https://lore.kernel.org/r/20210525070802.361755-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2 years agoio_uring: fix data race to avoid potential NULL-deref
Marco Elver [Thu, 27 May 2021 09:25:48 +0000 (11:25 +0200)]
io_uring: fix data race to avoid potential NULL-deref

Commit ba5ef6dc8a82 ("io_uring: fortify tctx/io_wq cleanup") introduced
setting tctx->io_wq to NULL a bit earlier. This has caused KCSAN to
detect a data race between accesses to tctx->io_wq:

  write to 0xffff88811d8df330 of 8 bytes by task 3709 on cpu 1:
   io_uring_clean_tctx                  fs/io_uring.c:9042 [inline]
   __io_uring_cancel                    fs/io_uring.c:9136
   io_uring_files_cancel                include/linux/io_uring.h:16 [inline]
   do_exit                              kernel/exit.c:781
   do_group_exit                        kernel/exit.c:923
   get_signal                           kernel/signal.c:2835
   arch_do_signal_or_restart            arch/x86/kernel/signal.c:789
   handle_signal_work                   kernel/entry/common.c:147 [inline]
   exit_to_user_mode_loop               kernel/entry/common.c:171 [inline]
   ...
  read to 0xffff88811d8df330 of 8 bytes by task 6412 on cpu 0:
   io_uring_try_cancel_iowq             fs/io_uring.c:8911 [inline]
   io_uring_try_cancel_requests         fs/io_uring.c:8933
   io_ring_exit_work                    fs/io_uring.c:8736
   process_one_work                     kernel/workqueue.c:2276
   ...

With the config used, KCSAN only reports data races with value changes:
this implies that in the case here we also know that tctx->io_wq was
non-NULL. Therefore, depending on interleaving, we may end up with:

              [CPU 0]                 |        [CPU 1]
  io_uring_try_cancel_iowq()          | io_uring_clean_tctx()
    if (!tctx->io_wq) // false        |   ...
    ...                               |   tctx->io_wq = NULL
    io_wq_cancel_cb(tctx->io_wq, ...) |   ...
      -> NULL-deref                   |

Note: It is likely that thus far we've gotten lucky and the compiler
optimizes the double-read into a single read into a register -- but this
is never guaranteed, and can easily change with a different config!

Fix the data race by restoring the previous behaviour, where both
setting io_wq to NULL and put of the wq are _serialized_ after
concurrent io_uring_try_cancel_iowq() via acquisition of the uring_lock
and removal of the node in io_uring_del_task_file().

Fixes: ba5ef6dc8a82 ("io_uring: fortify tctx/io_wq cleanup")
Suggested-by: Pavel Begunkov <asml.silence@gmail.com>
Reported-by: syzbot+bf2b3d0435b9b728946c@syzkaller.appspotmail.com
Signed-off-by: Marco Elver <elver@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/20210527092547.2656514-1-elver@google.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoMerge tag 'nvme-5.13-2021-05-27' of git://git.infradead.org/nvme into block-5.13
Jens Axboe [Thu, 27 May 2021 13:38:12 +0000 (07:38 -0600)]
Merge tag 'nvme-5.13-2021-05-27' of git://git.infradead.org/nvme into block-5.13

Pull NVMe fixes from Christoph:

"nvme fixes for Linux 5.13

 - fix a memory leak in nvme_cdev_add (Guoqing Jiang)
 - fix inline data size comparison in nvmet_tcp_queue_response (Hou Pu)
 - fix false keep-alive timeout when a controller is torn down
   (Sagi Grimberg)
 - fix a nvme-tcp Kconfig dependency (Sagi Grimberg)
 - short-circuit reconnect retries for FC (Hannes Reinecke)
 - decode host pathing error for connect (Hannes Reinecke)"

* tag 'nvme-5.13-2021-05-27' of git://git.infradead.org/nvme:
  nvmet: fix false keep-alive timeout when a controller is torn down
  nvmet-tcp: fix inline data size comparison in nvmet_tcp_queue_response
  nvme-tcp: remove incorrect Kconfig dep in BLK_DEV_NVME
  nvme-fabrics: decode host pathing error for connect
  nvme-fc: short-circuit reconnect retries
  nvme: fix potential memory leaks in nvme_cdev_add

2 years agoserial: 8250_pci: handle FL_NOIRQ board flag
Christian Gmeiner [Thu, 27 May 2021 09:54:40 +0000 (11:54 +0200)]
serial: 8250_pci: handle FL_NOIRQ board flag

In commit 8428413b1d14 ("serial: 8250_pci: Implement MSI(-X) support")
the way the irq gets allocated was changed. With that change the
handling FL_NOIRQ got lost. Restore the old behaviour.

Fixes: 8428413b1d14 ("serial: 8250_pci: Implement MSI(-X) support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Link: https://lore.kernel.org/r/20210527095529.26281-1-christian.gmeiner@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 years agonfs: Remove trailing semicolon in macros
Huilong Deng [Fri, 21 May 2021 14:07:37 +0000 (22:07 +0800)]
nfs: Remove trailing semicolon in macros

Macros should not use a trailing semicolon.

Signed-off-by: Huilong Deng <denghuilong@cdjrlc.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>