linux-stable.git/include/linux, branch v6.12.96 Linux kernel stable tree mm: do file ownership checks with the proper mount idmap 2026-07-18T14:52:14+00:00 Pedro Falcato pfalcato@suse.de 2026-06-25T15:38:53+00:00 8344bdf0629457e532797b42d9d2bbf2a2900bbf commit e187bc02f8fa4226d62814592cf064ee4557c470 upstream. Ever since idmapped mounts were introduced, inode ownership checks (for side-channel protection) in mincore() and madvise(MADV_PAGEOUT) were done against the nop_mnt_idmap, which completely ignores the file's mount's idmap. This results in odd edgecases like: 1) mount/bind-mount with an idmap userA:userB:1 2) userB runs an owner_or_capable() check on file that is owned by userA on-disk/in-memory, but owned by userB after idmap translation 3) owner_or_capable() mysteriously fails as the correct idmap wasn't supplied In the case of mincore/madvise MADV_PAGEOUT, this is usually benign, because file_permission(file, MAY_WRITE) will probably succeed, as it uses the proper idmap internally, but it does not need to be the case on e.g a 0444 file where even the owner itself doesn't have permissions to write to it. Since this is clearly not trivial to get right, introduce a file_owner_or_capable() that can carry the correct semantics, and switch the various users in mm to it. The issue was found by manual code inspection & an off-list discussion with Jan Kara. Link: https://lore.kernel.org/20260625153853.913949-1-pfalcato@suse.de Fixes: 9caccd41541a ("fs: introduce MOUNT_ATTR_IDMAP") Signed-off-by: Pedro Falcato <pfalcato@suse.de> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Christian Brauner (Amutable) <brauner@kernel.org> Acked-by: David Hildenbrand (Arm) <david@kernel.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Jann Horn <jannh@google.com> Cc: Liam R. Howlett <liam@infradead.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Vlastimil Babka <vbabka@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit e187bc02f8fa4226d62814592cf064ee4557c470 upstream.

Ever since idmapped mounts were introduced, inode ownership checks (for
side-channel protection) in mincore() and madvise(MADV_PAGEOUT) were done
against the nop_mnt_idmap, which completely ignores the file's mount's
idmap.  This results in odd edgecases like:

1) mount/bind-mount with an idmap userA:userB:1
2) userB runs an owner_or_capable() check on file that is owned by userA
on-disk/in-memory, but owned by userB after idmap translation
3) owner_or_capable() mysteriously fails as the correct idmap wasn't supplied

In the case of mincore/madvise MADV_PAGEOUT, this is usually benign,
because file_permission(file, MAY_WRITE) will probably succeed, as it uses
the proper idmap internally, but it does not need to be the case on e.g a
0444 file where even the owner itself doesn't have permissions to write to
it.

Since this is clearly not trivial to get right, introduce a
file_owner_or_capable() that can carry the correct semantics, and switch
the various users in mm to it.

The issue was found by manual code inspection & an off-list discussion
with Jan Kara.

Link: https://lore.kernel.org/20260625153853.913949-1-pfalcato@suse.de
Fixes: 9caccd41541a ("fs: introduce MOUNT_ATTR_IDMAP")
Signed-off-by: Pedro Falcato <pfalcato@suse.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christian Brauner (Amutable) <brauner@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jann Horn <jannh@google.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tracing: Prevent out-of-bounds read in glob matching 2026-07-18T14:52:14+00:00 Huihui Huang hhhuang@smu.edu.sg 2026-07-01T10:28:46+00:00 ebb55902856973906c8bb339a3a34824ed4a5086 commit 0a6070839b1ef276d5b05bedfb787743e140fb17 upstream. String event fields are not necessarily NUL-terminated, so the filter predicate functions (filter_pred_string(), filter_pred_strloc() and filter_pred_strrelloc()) pass the field length to the regex match callbacks, and the length-aware matchers honour it. regex_match_glob() was the exception: it ignored the length and called glob_match(), which scans the string until it hits a NUL byte. Some string fields are not NUL-terminated. One example is the dynamic char array of the xfs_* namespace tracepoints, which is copied without a trailing NUL. For such a field, glob matching reads past the end of the event field, causing a KASAN slab-out-of-bounds read in glob_match(), reached via regex_match_glob() and filter_match_preds() from the xfs_lookup tracepoint. Add a length-bounded glob_match_len() and use it from regex_match_glob() so glob matching always stops at the field boundary. The matching loop is factored into a shared helper so glob_match() keeps its behaviour. Fixes: 60f1d5e3bac4 ("ftrace: Support full glob matching") Cc: stable@vger.kernel.org Link: https://patch.msgid.link/da1aaf125fc3b63320b0c540fd6afa7c3d5b4f1a.1782836943.git.hhhuang@smu.edu.sg Reported-by: Yuan Tan <yuantan098@gmail.com> Reported-by: Yifan Wu <yifanwucs@gmail.com> Reported-by: Juefei Pu <tomapufckgml@gmail.com> Reported-by: Zhengchuan Liang <zcliangcn@gmail.com> Reported-by: Xin Liu <bird@lzu.edu.cn> Assisted-by: Codex:GPT-5.4 Signed-off-by: Huihui Huang <hhhuang@smu.edu.sg> Signed-off-by: Ren Wei <n05ec@lzu.edu.cn> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 0a6070839b1ef276d5b05bedfb787743e140fb17 upstream.

String event fields are not necessarily NUL-terminated, so the filter
predicate functions (filter_pred_string(), filter_pred_strloc() and
filter_pred_strrelloc()) pass the field length to the regex match
callbacks, and the length-aware matchers honour it.

regex_match_glob() was the exception: it ignored the length and called
glob_match(), which scans the string until it hits a NUL byte. Some
string fields are not NUL-terminated. One example is the dynamic char
array of the xfs_* namespace tracepoints, which is copied without a
trailing NUL. For such a field, glob matching reads past the end of
the event field, causing a KASAN slab-out-of-bounds read in
glob_match(), reached via regex_match_glob() and filter_match_preds()
from the xfs_lookup tracepoint.

Add a length-bounded glob_match_len() and use it from regex_match_glob()
so glob matching always stops at the field boundary. The matching loop
is factored into a shared helper so glob_match() keeps its behaviour.

Fixes: 60f1d5e3bac4 ("ftrace: Support full glob matching")
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/da1aaf125fc3b63320b0c540fd6afa7c3d5b4f1a.1782836943.git.hhhuang@smu.edu.sg
Reported-by: Yuan Tan <yuantan098@gmail.com>
Reported-by: Yifan Wu <yifanwucs@gmail.com>
Reported-by: Juefei Pu <tomapufckgml@gmail.com>
Reported-by: Zhengchuan Liang <zcliangcn@gmail.com>
Reported-by: Xin Liu <bird@lzu.edu.cn>
Assisted-by: Codex:GPT-5.4
Signed-off-by: Huihui Huang <hhhuang@smu.edu.sg>
Signed-off-by: Ren Wei <n05ec@lzu.edu.cn>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
HID: sensor-hub: Add sensor_hub_input_attr_read_values() for multi-byte reads 2026-07-18T14:52:07+00:00 Srinivas Pandruvada srinivas.pandruvada@linux.intel.com 2026-06-10T08:29:09+00:00 09ddf4221361ea4e357787fc2e23a7e555c24178 commit f784fcea450617055d2d12eec5b2f6e0e38bf878 upstream. sensor_hub_input_attr_get_raw_value() is limited to returning a single 32-bit value, which is insufficient for sensors that report data larger than 32 bits, such as a quaternion with four s16 elements. Add sensor_hub_input_attr_read_values() that accepts a caller-provided buffer and accumulates incoming data until the buffer is full. The two paths are distinguished in sensor_hub_raw_event() by pending.max_raw_size being non-zero, preserving backward compatibility. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Co-developed-by: Zhang Lixu <lixu.zhang@intel.com> Signed-off-by: Zhang Lixu <lixu.zhang@intel.com> Acked-by: Jiri Kosina <jkosina@suse.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit f784fcea450617055d2d12eec5b2f6e0e38bf878 upstream.

sensor_hub_input_attr_get_raw_value() is limited to returning a single
32-bit value, which is insufficient for sensors that report data larger
than 32 bits, such as a quaternion with four s16 elements.

Add sensor_hub_input_attr_read_values() that accepts a caller-provided
buffer and accumulates incoming data until the buffer is full. The two
paths are distinguished in sensor_hub_raw_event() by pending.max_raw_size
being non-zero, preserving backward compatibility.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Co-developed-by: Zhang Lixu <lixu.zhang@intel.com>
Signed-off-by: Zhang Lixu <lixu.zhang@intel.com>
Acked-by: Jiri Kosina <jkosina@suse.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
mm/damon/ops-common: handle extreme intervals in damon_hot_score() 2026-07-18T14:52:00+00:00 SeongJae Park sj@kernel.org 2026-06-23T13:58:31+00:00 ef2ae10a4582bc92b7e944181bbd2f87f3d30f3a commit 35d4a3cf70a855b50e53189ac2f8463e20a02046 upstream. Fix three issues in damon_hot_score() that comes from wrong handling of extreme (zero or too high) monitoring intervals user setup. When the user sets sampling interval zero, damon_max_nr_accesses(), which is called from damon_hot_score(), causes a divide-by-zero. Needless to say, it is a problem. When the user sets the aggregation interval zero, the function returns zero. It is wrong, since the real maximum nr_acceses in the setup should be one. Worse yet, it can cause another divide-by-zero from its caller, damon_hot_score(), since it uses damon_max_nr_accesses() return value as a denominator. When the user sets the aggregation interval very high, damon_hot_score() could return a value out of [0, DAMOS_MAX_SCORE] range. Since the return value is used as an index to the regions_score_histogram array, which is DAMOS_MAX_SCORE+1 size, it causes out of bounds array access. The issues can be relatively easily reproduced like below. The sysfs write permission is required, though. # ./damo start --damos_action lru_prio --damos_quota_space 100M \ --damos_quota_interval 1s # cd /sys/kernel/mm/damon/admin/kdamonds/0 # echo 0 > contexts/0/monitoring_attrs/intervals/sample_us # echo 0 > contexts/0/monitoring_attrs/intervals/aggr_us # echo commit > state # dmesg [...] [ 131.329762] Oops: divide error: 0000 [#1] SMP NOPTI [...] [ 131.336089] RIP: 0010:damon_hot_score+0x27/0xd0 [...] Fix the divide-by-zero intervals problems by explicitly handling the zero intervals in damon_max_nr_accesses(). Fix the out-of-bound array access by applying [0, DAMOS_MAX_SCORE] bounds before returning from damon_hot_score(). The issue was discovered [1] by Sashiko. Link: https://lore.kernel.org/20260623135834.67189-1-sj@kernel.org Link: https://lore.kernel.org/20260619202459.145010-1-sj@kernel.org [1] Fixes: 198f0f4c58b9 ("mm/damon/vaddr,paddr: support pageout prioritization") Signed-off-by: SeongJae Park <sj@kernel.org> Cc: <stable@vger.kernel.org> # 5.16.x Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 35d4a3cf70a855b50e53189ac2f8463e20a02046 upstream.

Fix three issues in damon_hot_score() that comes from wrong handling of
extreme (zero or too high) monitoring intervals user setup.

When the user sets sampling interval zero, damon_max_nr_accesses(), which
is called from damon_hot_score(), causes a divide-by-zero.  Needless to
say, it is a problem.

When the user sets the aggregation interval zero, the function returns
zero.  It is wrong, since the real maximum nr_acceses in the setup should
be one.  Worse yet, it can cause another divide-by-zero from its caller,
damon_hot_score(), since it uses damon_max_nr_accesses() return value as a
denominator.

When the user sets the aggregation interval very high, damon_hot_score()
could return a value out of [0, DAMOS_MAX_SCORE] range.  Since the return
value is used as an index to the regions_score_histogram array, which is
DAMOS_MAX_SCORE+1 size, it causes out of bounds array access.

The issues can be relatively easily reproduced like below.  The sysfs
write permission is required, though.

    # ./damo start --damos_action lru_prio --damos_quota_space 100M \
            --damos_quota_interval 1s
    # cd /sys/kernel/mm/damon/admin/kdamonds/0
    # echo 0 > contexts/0/monitoring_attrs/intervals/sample_us
    # echo 0 > contexts/0/monitoring_attrs/intervals/aggr_us
    # echo commit > state
    # dmesg
    [...]
    [  131.329762] Oops: divide error: 0000 [#1] SMP NOPTI
    [...]
    [  131.336089] RIP: 0010:damon_hot_score+0x27/0xd0
    [...]

Fix the divide-by-zero intervals problems by explicitly handling the zero
intervals in damon_max_nr_accesses().  Fix the out-of-bound array access
by applying [0, DAMOS_MAX_SCORE] bounds before returning from
damon_hot_score().

The issue was discovered [1] by Sashiko.

Link: https://lore.kernel.org/20260623135834.67189-1-sj@kernel.org
Link: https://lore.kernel.org/20260619202459.145010-1-sj@kernel.org [1]
Fixes: 198f0f4c58b9 ("mm/damon/vaddr,paddr: support pageout prioritization")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org> # 5.16.x
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
vfio/pci: Fix racy bitfields and tighten struct layout 2026-07-18T14:51:59+00:00 Alex Williamson alex.williamson@nvidia.com 2026-06-15T19:12:31+00:00 5e91e4c329a711123b02354b6a36bdc05cc9ca17 commit e73638e55f861758d49f14d7bb5dba3035981cd7 upstream. Bitfield operations are not atomic, they use a read-modify-write pattern, therefore we should be careful not to pack bitfields that can be concurrently updated into the same storage unit. This split takes a binary approach: flags that are only modified pre/post open/close remain bitfields, flags modified from user action, including actions that reach across to another device (ex. reset) use dedicated storage units. Note that the virq_disabled and bardirty flags are relocated to fill an existing hole in the structure. Bitfield justifications: has_dyn_msix: written only in vfio_pci_core_enable() pci_2_3: written only in vfio_pci_core_enable() reset_works: written only in vfio_pci_core_enable() extended_caps: written only in vfio_cap_len() under vfio_config_init() has_vga: written only in vfio_pci_core_enable() nointx: written only in vfio_pci_core_enable() needs_pm_restore: written only in vfio_pci_probe_power_state() disable_idle_d3: written only at .init in vfio_pci_core_init_dev() Dedicated storage units: virq_disabled: written by guest INTx command writes in vfio_basic_config_write() while the device is open bardirty: written by guest BAR writes in vfio_basic_config_write() while the device is open pm_intx_masked: written in the runtime-PM suspend path. pm_runtime_engaged: written by low-power feature entry/exit paths needs_reset: set in vfio_pci_core_disable() and cleared for devices in the set by vfio_pci_dev_set_try_reset() sriov_active: written by vfio_pci_core_sriov_configure() via sysfs sriov_numvfs while bound. Fixes: 9cd0f6d5cbb6 ("vfio/pci: Use bitfield for struct vfio_pci_core_device flags") Cc: stable@vger.kernel.org Assisted-by: Claude:claude-opus-4-8 Signed-off-by: Alex Williamson <alex.williamson@nvidia.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Link: https://lore.kernel.org/r/20260615191241.688297-4-alex.williamson@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit e73638e55f861758d49f14d7bb5dba3035981cd7 upstream.

Bitfield operations are not atomic, they use a read-modify-write
pattern, therefore we should be careful not to pack bitfields that
can be concurrently updated into the same storage unit.

This split takes a binary approach: flags that are only modified
pre/post open/close remain bitfields, flags modified from user
action, including actions that reach across to another device (ex.
reset) use dedicated storage units.

Note that the virq_disabled and bardirty flags are relocated to fill
an existing hole in the structure.

Bitfield justifications:

  has_dyn_msix: written only in vfio_pci_core_enable()
  pci_2_3: written only in vfio_pci_core_enable()
  reset_works: written only in vfio_pci_core_enable()
  extended_caps: written only in vfio_cap_len() under vfio_config_init()
  has_vga: written only in vfio_pci_core_enable()
  nointx: written only in vfio_pci_core_enable()
  needs_pm_restore: written only in vfio_pci_probe_power_state()
  disable_idle_d3: written only at .init in vfio_pci_core_init_dev()

Dedicated storage units:

  virq_disabled: written by guest INTx command writes in
                 vfio_basic_config_write() while the device is open
  bardirty: written by guest BAR writes in vfio_basic_config_write()
            while the device is open
  pm_intx_masked: written in the runtime-PM suspend path.
  pm_runtime_engaged: written by low-power feature entry/exit paths
  needs_reset: set in vfio_pci_core_disable() and cleared for devices in
               the set by vfio_pci_dev_set_try_reset()
  sriov_active: written by vfio_pci_core_sriov_configure() via sysfs
                sriov_numvfs while bound.

Fixes: 9cd0f6d5cbb6 ("vfio/pci: Use bitfield for struct vfio_pci_core_device flags")
Cc: stable@vger.kernel.org
Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Alex Williamson <alex.williamson@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20260615191241.688297-4-alex.williamson@nvidia.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
vfio/pci: Latch disable_idle_d3 per device 2026-07-18T14:51:59+00:00 Alex Williamson alex.williamson@nvidia.com 2026-06-15T19:12:29+00:00 b98296816d31441b307ef9fa8670dcf5a55e5505 commit 4575e9aac5336d1365138c0284773bf8da4b1fa3 upstream. When disable_idle_d3 was introduced in vfio-pci, it directly manipulated the device power state with pci_set_power_state(). There were no refcounts to maintain or balanced operations, we could unconditionally bring the device to D0 and conditionally move it to D3hot. Therefore the module parameter was made writable. Later, in commit c61302aa48f7 ("vfio/pci: Move module parameters to vfio_pci.c"), as part of the vfio-pci-core split, the writable aspect of the module parameter was nullified. The parameter value could still be changed through sysfs, but the vfio-pci driver latched the values into vfio-pci-core globals at module init. Loading the vfio-pci module, or unloading and reloading, with non-default or different values could change the globals relative to existing devices bound to vfio-pci variant drivers. Runtime PM was introduced in commit 7ab5e10eda02 ("vfio/pci: Move the unused device into low power state with runtime PM"), which marks the point where power states became refcounted. PM get and put operations need to be balanced, but the same module operations noted above can change the global variables relative to those devices already bound to vfio-pci variant drivers. This introduces a window where PM operations can now become unbalanced. To resolve this with a narrow footprint for stable backports, the disable_idle_d3 flag is latched into the vfio_pci_core_device at the time of initialization, such that the device always operates with a consistent value. NB. vfio_pci_dev_set_try_reset() now unconditionally raises the runtime PM usage count around bus reset to account for disable_idle_d3 becoming a per-device rather than global flag. When this flag is set, the additional get/put pair is harmless and allows continued use of the shared vfio_pci_dev_set_pm_runtime_get() helper. Fixes: 7ab5e10eda02 ("vfio/pci: Move the unused device into low power state with runtime PM") Cc: stable@vger.kernel.org Assisted-by: Claude:claude-opus-4-8 Signed-off-by: Alex Williamson <alex.williamson@nvidia.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Link: https://lore.kernel.org/r/20260615191241.688297-2-alex.williamson@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 4575e9aac5336d1365138c0284773bf8da4b1fa3 upstream.

When disable_idle_d3 was introduced in vfio-pci, it directly manipulated
the device power state with pci_set_power_state().  There were no
refcounts to maintain or balanced operations, we could unconditionally
bring the device to D0 and conditionally move it to D3hot.  Therefore
the module parameter was made writable.

Later, in commit c61302aa48f7 ("vfio/pci: Move module parameters to
vfio_pci.c"), as part of the vfio-pci-core split, the writable aspect
of the module parameter was nullified.  The parameter value could still
be changed through sysfs, but the vfio-pci driver latched the values
into vfio-pci-core globals at module init.  Loading the vfio-pci module,
or unloading and reloading, with non-default or different values could
change the globals relative to existing devices bound to vfio-pci
variant drivers.

Runtime PM was introduced in commit 7ab5e10eda02 ("vfio/pci: Move the
unused device into low power state with runtime PM"), which marks the
point where power states became refcounted.  PM get and put operations
need to be balanced, but the same module operations noted above can
change the global variables relative to those devices already bound to
vfio-pci variant drivers.  This introduces a window where PM operations
can now become unbalanced.

To resolve this with a narrow footprint for stable backports, the
disable_idle_d3 flag is latched into the vfio_pci_core_device at the
time of initialization, such that the device always operates with a
consistent value.

NB. vfio_pci_dev_set_try_reset() now unconditionally raises the
runtime PM usage count around bus reset to account for disable_idle_d3
becoming a per-device rather than global flag.  When this flag is set,
the additional get/put pair is harmless and allows continued use of the
shared vfio_pci_dev_set_pm_runtime_get() helper.

Fixes: 7ab5e10eda02 ("vfio/pci: Move the unused device into low power state with runtime PM")
Cc: stable@vger.kernel.org
Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Alex Williamson <alex.williamson@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20260615191241.688297-2-alex.williamson@nvidia.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
vfio/pci: Use a private flag to prevent power state change with VFs 2026-07-18T14:51:59+00:00 Raghavendra Rao Ananta rananta@google.com 2026-05-14T17:34:49+00:00 99e22a5713c148c79499e6ad71b81a26438a6a30 commit 40ef3edf151e184d021917a5c4c771cc0870844a upstream. The current implementation uses pci_num_vf() while holding the memory_lock to prevent changing the power state of a PF when VFs are enabled. This creates a lockdep circular dependency warning because memory_lock is held during device probing. [ 286.997167] ====================================================== [ 287.003363] WARNING: possible circular locking dependency detected [ 287.009562] 7.0.0-dbg-DEV #3 Tainted: G S [ 287.015074] ------------------------------------------------------ [ 287.021270] vfio_pci_sriov_/18636 is trying to acquire lock: [ 287.026942] ff45bea2294d4968 (&vdev->memory_lock){+.+.}-{4:4}, at: vfio_pci_core_runtime_resume+0x1f/0xa0 [ 287.036530] [ 287.036530] but task is already holding lock: [ 287.042383] ff45bea3a96b8230 (&new_dev_set->lock){+.+.}-{4:4}, at: vfio_group_fops_unl_ioctl+0x44d/0x7b0 [ 287.051879] [ 287.051879] which lock already depends on the new lock. [ 287.051879] [ 287.060070] [ 287.060070] the existing dependency chain (in reverse order) is: [ 287.067568] [ 287.067568] -> #2 (&new_dev_set->lock){+.+.}-{4:4}: [ 287.073941] __mutex_lock+0x92/0xb80 [ 287.078058] vfio_assign_device_set+0x66/0x1b0 [ 287.083042] vfio_pci_core_register_device+0xd1/0x2a0 [ 287.088638] vfio_pci_probe+0xd2/0x100 [ 287.092933] local_pci_probe_callback+0x4d/0xa0 [ 287.098001] process_scheduled_works+0x2ca/0x680 [ 287.103158] worker_thread+0x1e8/0x2f0 [ 287.107452] kthread+0x10c/0x140 [ 287.111230] ret_from_fork+0x18e/0x360 [ 287.115519] ret_from_fork_asm+0x1a/0x30 [ 287.119983] [ 287.119983] -> #1 ((work_completion)(&arg.work)){+.+.}-{0:0}: [ 287.127219] __flush_work+0x345/0x490 [ 287.131429] pci_device_probe+0x2e3/0x490 [ 287.135979] really_probe+0x1f9/0x4e0 [ 287.140180] __driver_probe_device+0x77/0x100 [ 287.145079] driver_probe_device+0x1e/0x110 [ 287.149803] __device_attach_driver+0xe3/0x170 [ 287.154789] bus_for_each_drv+0x125/0x150 [ 287.159346] __device_attach+0xca/0x1a0 [ 287.163720] device_initial_probe+0x34/0x50 [ 287.168445] pci_bus_add_device+0x6e/0x90 [ 287.172995] pci_iov_add_virtfn+0x3c9/0x3e0 [ 287.177719] sriov_add_vfs+0x2c/0x60 [ 287.181838] sriov_enable+0x306/0x4a0 [ 287.186038] vfio_pci_core_sriov_configure+0x184/0x220 [ 287.191715] sriov_numvfs_store+0xd9/0x1c0 [ 287.196351] kernfs_fop_write_iter+0x13f/0x1d0 [ 287.201338] vfs_write+0x2be/0x3b0 [ 287.205286] ksys_write+0x73/0x100 [ 287.209233] do_syscall_64+0x14d/0x750 [ 287.213529] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.219120] [ 287.219120] -> #0 (&vdev->memory_lock){+.+.}-{4:4}: [ 287.225491] __lock_acquire+0x14c6/0x2800 [ 287.230048] lock_acquire+0xd3/0x2f0 [ 287.234168] down_write+0x3a/0xc0 [ 287.238019] vfio_pci_core_runtime_resume+0x1f/0xa0 [ 287.243436] __rpm_callback+0x8c/0x310 [ 287.247730] rpm_resume+0x529/0x6f0 [ 287.251765] __pm_runtime_resume+0x68/0x90 [ 287.256402] vfio_pci_core_enable+0x44/0x310 [ 287.261216] vfio_pci_open_device+0x1c/0x80 [ 287.265947] vfio_df_open+0x10f/0x150 [ 287.270148] vfio_group_fops_unl_ioctl+0x4a4/0x7b0 [ 287.275476] __se_sys_ioctl+0x71/0xc0 [ 287.279679] do_syscall_64+0x14d/0x750 [ 287.283975] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.289559] [ 287.289559] other info that might help us debug this: [ 287.289559] [ 287.297582] Chain exists of: [ 287.297582] &vdev->memory_lock --> (work_completion)(&arg.work) --> &new_dev_set->lock [ 287.297582] [ 287.310023] Possible unsafe locking scenario: [ 287.310023] [ 287.315961] CPU0 CPU1 [ 287.320510] ---- ---- [ 287.325059] lock(&new_dev_set->lock); [ 287.328917] lock((work_completion)(&arg.work)); [ 287.336153] lock(&new_dev_set->lock); [ 287.342523] lock(&vdev->memory_lock); [ 287.346382] [ 287.346382] *** DEADLOCK *** [ 287.346382] [ 287.352315] 2 locks held by vfio_pci_sriov_/18636: [ 287.357125] #0: ff45bea208ed3e18 (&group->group_lock){+.+.}-{4:4}, at: vfio_group_fops_unl_ioctl+0x3e3/0x7b0 [ 287.367048] #1: ff45bea3a96b8230 (&new_dev_set->lock){+.+.}-{4:4}, at: vfio_group_fops_unl_ioctl+0x44d/0x7b0 [ 287.376976] [ 287.376976] stack backtrace: [ 287.381353] CPU: 191 UID: 0 PID: 18636 Comm: vfio_pci_sriov_ Tainted: G S 7.0.0-dbg-DEV #3 PREEMPTLAZY [ 287.381355] Tainted: [S]=CPU_OUT_OF_SPEC [ 287.381356] Call Trace: [ 287.381357] <TASK> [ 287.381358] dump_stack_lvl+0x54/0x70 [ 287.381361] print_circular_bug+0x2e1/0x300 [ 287.381363] check_noncircular+0xf9/0x120 [ 287.381364] ? __lock_acquire+0x5b4/0x2800 [ 287.381366] __lock_acquire+0x14c6/0x2800 [ 287.381368] ? pci_mmcfg_read+0x4f/0x220 [ 287.381370] ? pci_mmcfg_write+0x57/0x220 [ 287.381371] ? lock_acquire+0xd3/0x2f0 [ 287.381373] ? pci_mmcfg_write+0x57/0x220 [ 287.381374] ? lock_release+0xef/0x360 [ 287.381376] ? vfio_pci_core_runtime_resume+0x1f/0xa0 [ 287.381377] lock_acquire+0xd3/0x2f0 [ 287.381378] ? vfio_pci_core_runtime_resume+0x1f/0xa0 [ 287.381379] ? lock_is_held_type+0x76/0x100 [ 287.381382] down_write+0x3a/0xc0 [ 287.381382] ? vfio_pci_core_runtime_resume+0x1f/0xa0 [ 287.381383] vfio_pci_core_runtime_resume+0x1f/0xa0 [ 287.381384] ? __pfx_pci_pm_runtime_resume+0x10/0x10 [ 287.381385] __rpm_callback+0x8c/0x310 [ 287.381386] ? ktime_get_mono_fast_ns+0x3d/0xb0 [ 287.381389] ? __pfx_pci_pm_runtime_resume+0x10/0x10 [ 287.381390] rpm_resume+0x529/0x6f0 [ 287.381392] ? lock_is_held_type+0x76/0x100 [ 287.381394] __pm_runtime_resume+0x68/0x90 [ 287.381396] vfio_pci_core_enable+0x44/0x310 [ 287.381398] vfio_pci_open_device+0x1c/0x80 [ 287.381399] vfio_df_open+0x10f/0x150 [ 287.381401] vfio_group_fops_unl_ioctl+0x4a4/0x7b0 [ 287.381402] __se_sys_ioctl+0x71/0xc0 [ 287.381404] do_syscall_64+0x14d/0x750 [ 287.381405] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.381406] ? trace_irq_disable+0x25/0xd0 [ 287.381409] entry_SYSCALL_64_after_hwframe+0x77/0x7f Introduce a private flag 'sriov_active' in the vfio_pci_core_device struct. This allows the driver to track the SR-IOV power state requirement without relying on pci_num_vf() while holding the memory_lock. The lock is now only held to set the flag and ensure the device is in D0, after which pci_enable_sriov() can be called without the lock. Fixes: f4162eb1e2fc ("vfio/pci: Change the PF power state to D0 before enabling VFs") Cc: stable@vger.kernel.org Suggested-by: Jason Gunthorpe <jgg@ziepe.ca> Suggested-by: Alex Williamson <alex@shazbot.org> Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> Link: https://lore.kernel.org/r/20260514173449.3282188-1-rananta@google.com [promote bitfield to plain bool to avoid storage-unit races] Signed-off-by: Alex Williamson <alex@shazbot.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 40ef3edf151e184d021917a5c4c771cc0870844a upstream.

The current implementation uses pci_num_vf() while holding the
memory_lock to prevent changing the power state of a PF when
VFs are enabled. This creates a lockdep circular dependency
warning because memory_lock is held during device probing.

[  286.997167] ======================================================
[  287.003363] WARNING: possible circular locking dependency detected
[  287.009562] 7.0.0-dbg-DEV #3 Tainted: G S
[  287.015074] ------------------------------------------------------
[  287.021270] vfio_pci_sriov_/18636 is trying to acquire lock:
[  287.026942] ff45bea2294d4968 (&vdev->memory_lock){+.+.}-{4:4}, at:
vfio_pci_core_runtime_resume+0x1f/0xa0
[  287.036530]
[  287.036530] but task is already holding lock:
[  287.042383] ff45bea3a96b8230 (&new_dev_set->lock){+.+.}-{4:4}, at:
vfio_group_fops_unl_ioctl+0x44d/0x7b0
[  287.051879]
[  287.051879] which lock already depends on the new lock.
[  287.051879]
[  287.060070]
[  287.060070] the existing dependency chain (in reverse order) is:
[  287.067568]
[  287.067568] -> #2 (&new_dev_set->lock){+.+.}-{4:4}:
[  287.073941]        __mutex_lock+0x92/0xb80
[  287.078058]        vfio_assign_device_set+0x66/0x1b0
[  287.083042]        vfio_pci_core_register_device+0xd1/0x2a0
[  287.088638]        vfio_pci_probe+0xd2/0x100
[  287.092933]        local_pci_probe_callback+0x4d/0xa0
[  287.098001]        process_scheduled_works+0x2ca/0x680
[  287.103158]        worker_thread+0x1e8/0x2f0
[  287.107452]        kthread+0x10c/0x140
[  287.111230]        ret_from_fork+0x18e/0x360
[  287.115519]        ret_from_fork_asm+0x1a/0x30
[  287.119983]
[  287.119983] -> #1 ((work_completion)(&arg.work)){+.+.}-{0:0}:
[  287.127219]        __flush_work+0x345/0x490
[  287.131429]        pci_device_probe+0x2e3/0x490
[  287.135979]        really_probe+0x1f9/0x4e0
[  287.140180]        __driver_probe_device+0x77/0x100
[  287.145079]        driver_probe_device+0x1e/0x110
[  287.149803]        __device_attach_driver+0xe3/0x170
[  287.154789]        bus_for_each_drv+0x125/0x150
[  287.159346]        __device_attach+0xca/0x1a0
[  287.163720]        device_initial_probe+0x34/0x50
[  287.168445]        pci_bus_add_device+0x6e/0x90
[  287.172995]        pci_iov_add_virtfn+0x3c9/0x3e0
[  287.177719]        sriov_add_vfs+0x2c/0x60
[  287.181838]        sriov_enable+0x306/0x4a0
[  287.186038]        vfio_pci_core_sriov_configure+0x184/0x220
[  287.191715]        sriov_numvfs_store+0xd9/0x1c0
[  287.196351]        kernfs_fop_write_iter+0x13f/0x1d0
[  287.201338]        vfs_write+0x2be/0x3b0
[  287.205286]        ksys_write+0x73/0x100
[  287.209233]        do_syscall_64+0x14d/0x750
[  287.213529]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  287.219120]
[  287.219120] -> #0 (&vdev->memory_lock){+.+.}-{4:4}:
[  287.225491]        __lock_acquire+0x14c6/0x2800
[  287.230048]        lock_acquire+0xd3/0x2f0
[  287.234168]        down_write+0x3a/0xc0
[  287.238019]        vfio_pci_core_runtime_resume+0x1f/0xa0
[  287.243436]        __rpm_callback+0x8c/0x310
[  287.247730]        rpm_resume+0x529/0x6f0
[  287.251765]        __pm_runtime_resume+0x68/0x90
[  287.256402]        vfio_pci_core_enable+0x44/0x310
[  287.261216]        vfio_pci_open_device+0x1c/0x80
[  287.265947]        vfio_df_open+0x10f/0x150
[  287.270148]        vfio_group_fops_unl_ioctl+0x4a4/0x7b0
[  287.275476]        __se_sys_ioctl+0x71/0xc0
[  287.279679]        do_syscall_64+0x14d/0x750
[  287.283975]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  287.289559]
[  287.289559] other info that might help us debug this:
[  287.289559]
[  287.297582] Chain exists of:
[  287.297582]   &vdev->memory_lock --> (work_completion)(&arg.work)
--> &new_dev_set->lock
[  287.297582]
[  287.310023]  Possible unsafe locking scenario:
[  287.310023]
[  287.315961]        CPU0                    CPU1
[  287.320510]        ----                    ----
[  287.325059]   lock(&new_dev_set->lock);
[  287.328917]
lock((work_completion)(&arg.work));
[  287.336153]                                lock(&new_dev_set->lock);
[  287.342523]   lock(&vdev->memory_lock);
[  287.346382]
[  287.346382]  *** DEADLOCK ***
[  287.346382]
[  287.352315] 2 locks held by vfio_pci_sriov_/18636:
[  287.357125]  #0: ff45bea208ed3e18 (&group->group_lock){+.+.}-{4:4},
at: vfio_group_fops_unl_ioctl+0x3e3/0x7b0
[  287.367048]  #1: ff45bea3a96b8230 (&new_dev_set->lock){+.+.}-{4:4},
at: vfio_group_fops_unl_ioctl+0x44d/0x7b0
[  287.376976]
[  287.376976] stack backtrace:
[  287.381353] CPU: 191 UID: 0 PID: 18636 Comm: vfio_pci_sriov_
Tainted: G S                  7.0.0-dbg-DEV #3 PREEMPTLAZY
[  287.381355] Tainted: [S]=CPU_OUT_OF_SPEC
[  287.381356] Call Trace:
[  287.381357]  <TASK>
[  287.381358]  dump_stack_lvl+0x54/0x70
[  287.381361]  print_circular_bug+0x2e1/0x300
[  287.381363]  check_noncircular+0xf9/0x120
[  287.381364]  ? __lock_acquire+0x5b4/0x2800
[  287.381366]  __lock_acquire+0x14c6/0x2800
[  287.381368]  ? pci_mmcfg_read+0x4f/0x220
[  287.381370]  ? pci_mmcfg_write+0x57/0x220
[  287.381371]  ? lock_acquire+0xd3/0x2f0
[  287.381373]  ? pci_mmcfg_write+0x57/0x220
[  287.381374]  ? lock_release+0xef/0x360
[  287.381376]  ? vfio_pci_core_runtime_resume+0x1f/0xa0
[  287.381377]  lock_acquire+0xd3/0x2f0
[  287.381378]  ? vfio_pci_core_runtime_resume+0x1f/0xa0
[  287.381379]  ? lock_is_held_type+0x76/0x100
[  287.381382]  down_write+0x3a/0xc0
[  287.381382]  ? vfio_pci_core_runtime_resume+0x1f/0xa0
[  287.381383]  vfio_pci_core_runtime_resume+0x1f/0xa0
[  287.381384]  ? __pfx_pci_pm_runtime_resume+0x10/0x10
[  287.381385]  __rpm_callback+0x8c/0x310
[  287.381386]  ? ktime_get_mono_fast_ns+0x3d/0xb0
[  287.381389]  ? __pfx_pci_pm_runtime_resume+0x10/0x10
[  287.381390]  rpm_resume+0x529/0x6f0
[  287.381392]  ? lock_is_held_type+0x76/0x100
[  287.381394]  __pm_runtime_resume+0x68/0x90
[  287.381396]  vfio_pci_core_enable+0x44/0x310
[  287.381398]  vfio_pci_open_device+0x1c/0x80
[  287.381399]  vfio_df_open+0x10f/0x150
[  287.381401]  vfio_group_fops_unl_ioctl+0x4a4/0x7b0
[  287.381402]  __se_sys_ioctl+0x71/0xc0
[  287.381404]  do_syscall_64+0x14d/0x750
[  287.381405]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  287.381406]  ? trace_irq_disable+0x25/0xd0
[  287.381409]  entry_SYSCALL_64_after_hwframe+0x77/0x7f

Introduce a private flag 'sriov_active' in the vfio_pci_core_device
struct. This  allows the driver to track the SR-IOV power state requirement
without  relying on pci_num_vf() while holding the memory_lock. The lock is
now  only held to set the flag and ensure the device is in D0, after which
pci_enable_sriov() can be called without the lock.

Fixes: f4162eb1e2fc ("vfio/pci: Change the PF power state to D0 before enabling VFs")
Cc: stable@vger.kernel.org
Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
Suggested-by: Alex Williamson <alex@shazbot.org>
Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Link: https://lore.kernel.org/r/20260514173449.3282188-1-rananta@google.com
[promote bitfield to plain bool to avoid storage-unit races]
Signed-off-by: Alex Williamson <alex@shazbot.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
nfs_common: rename functions that invalidate LOCALIO nfs_clients 2026-07-18T14:51:54+00:00 Mike Snitzer snitzer@kernel.org 2026-07-05T03:11:47+00:00 e29ca51c7435f7efbed1f059c1f18ea86bbd26d0 [ Upstream commit b49f049a22227df701bfbca083d6cc859496e615 ] Rename nfs_uuid_invalidate_one_client to nfs_localio_disable_client. Rename nfs_uuid_invalidate_clients to nfs_localio_invalidate_clients. Signed-off-by: Mike Snitzer <snitzer@kernel.org> Reviewed-by: NeilBrown <neilb@suse.de> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com> Stable-dep-of: 2c6bb3c40bc2 ("NFSv4/flexfiles: reject zero filehandle version count") Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
[ Upstream commit b49f049a22227df701bfbca083d6cc859496e615 ]

Rename nfs_uuid_invalidate_one_client to nfs_localio_disable_client.
Rename nfs_uuid_invalidate_clients to nfs_localio_invalidate_clients.

Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Reviewed-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Stable-dep-of: 2c6bb3c40bc2 ("NFSv4/flexfiles: reject zero filehandle version count")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
nfsd: add nfsd_file_{get,put} to 'nfs_to' nfsd_localio_operations 2026-07-18T14:51:54+00:00 Mike Snitzer snitzer@kernel.org 2026-07-05T03:11:46+00:00 1adb9eba794a4746240031be0e96a6ed32d94347 [ Upstream commit a61466315d7afca032342183a57e62d5e3a3157c ] In later a commit LOCALIO must call both nfsd_file_get and nfsd_file_put to manage extra nfsd_file references. Signed-off-by: Mike Snitzer <snitzer@kernel.org> Reviewed-by: Jeff Layton <jlayton@kernel.org> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com> Stable-dep-of: 2c6bb3c40bc2 ("NFSv4/flexfiles: reject zero filehandle version count") Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
[ Upstream commit a61466315d7afca032342183a57e62d5e3a3157c ]

In later a commit LOCALIO must call both nfsd_file_get and
nfsd_file_put to manage extra nfsd_file references.

Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Stable-dep-of: 2c6bb3c40bc2 ("NFSv4/flexfiles: reject zero filehandle version count")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
f2fs: validate orphan inode entry count 2026-07-18T14:51:54+00:00 Wenjie Qi qwjhust@gmail.com 2026-07-03T12:34:00+00:00 550511a2470f6d204fa07b331f048bd2d3c51280 [ Upstream commit 846c499a65816d13f1186e3090e825e8bb8bcb8b ] f2fs_recover_orphan_inodes() trusts the orphan block entry_count when replaying orphan inodes from the checkpoint pack. A corrupted entry_count larger than F2FS_ORPHANS_PER_BLOCK makes the recovery loop read past the ino[] array and interpret footer or following data as inode numbers. On a crafted image, mounting an unpatched kernel can drive orphan recovery into f2fs_bug_on() and panic the kernel. Validate entry_count before consuming entries so corrupted checkpoint data fails the mount with -EFSCORRUPTED and requests fsck instead. Set ERROR_INCONSISTENT_ORPHAN as well, so the corruption reason can be recorded in the superblock s_errors[] field. This gives fsck a persistent hint even though mount-time orphan recovery failure may leave no chance to persist SBI_NEED_FSCK through a checkpoint. Cc: stable@kernel.org Fixes: 127e670abfa7 ("f2fs: add checkpoint operations") Signed-off-by: Wenjie Qi <qiwenjie@xiaomi.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
[ Upstream commit 846c499a65816d13f1186e3090e825e8bb8bcb8b ]

f2fs_recover_orphan_inodes() trusts the orphan block entry_count when
replaying orphan inodes from the checkpoint pack. A corrupted entry_count
larger than F2FS_ORPHANS_PER_BLOCK makes the recovery loop read past the
ino[] array and interpret footer or following data as inode numbers.

On a crafted image, mounting an unpatched kernel can drive orphan recovery
into f2fs_bug_on() and panic the kernel. Validate entry_count before
consuming entries so corrupted checkpoint data fails the mount with
-EFSCORRUPTED and requests fsck instead.

Set ERROR_INCONSISTENT_ORPHAN as well, so the corruption reason can be
recorded in the superblock s_errors[] field. This gives fsck a persistent
hint even though mount-time orphan recovery failure may leave no chance to
persist SBI_NEED_FSCK through a checkpoint.

Cc: stable@kernel.org
Fixes: 127e670abfa7 ("f2fs: add checkpoint operations")
Signed-off-by: Wenjie Qi <qiwenjie@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>