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After this conversion, if "dirsync" or "sync" is enabled, the
number of synchronized dentries in exfat_add_entry() will change
from 2 to 1.
Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Andy Wu <Andy.Wu@sony.com>
Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This helper is used to lookup empty dentry set. If there are
no enough empty dentries at the input location, this helper will
return the number of dentries that need to be skipped for the
next lookup.
Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Andy Wu <Andy.Wu@sony.com>
Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Since exfat_get_dentry_set() invokes the validate functions of
exfat_validate_entry(), it only supports getting a directory
entry set of an existing file, doesn't support getting an empty
entry set.
To remove the limitation, add this helper.
Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Andy Wu <Andy.Wu@sony.com>
Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
We need to check for journal shutdown first in __journal_res_get() -
after the journal is shutdown, j->watermark won't be changing anymore.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
BCH_TRANS_COMMIT_journal_reclaim with watermark != BCH_WATERMARK_reclaim
means nonblocking, and we need the journal_res_get() in
btree_update_start() to respect that.
In a future refactoring we'll be deleting
BCH_TRANS_COMMIT_journal_reclaim and replacing it with an explicit
BCH_TRANS_COMMIT_nonblocking.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
ksmbd module version marking is not needed. Since there is a
Linux kernel version, there is no point in increasing it anymore.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
I found potencial out-of-bounds when buffer offset fields of a few requests
is invalid. This patch set the minimum value of buffer offset field to
->Buffer offset to validate buffer length.
Cc: stable@vger.kernel.org
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
- Fix mistaken variable assignment that caused a refcounting problem.
- Revert a recent change that began using atomic counters where they
were not needed (for lkb wait_count.)
- Add comments around forced state reset for waiting lock operations
during recovery.
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Merge tag 'dlm-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm
Pull dlm updates from David Teigland:
- Fix mistaken variable assignment that caused a refcounting problem
- Revert a recent change that began using atomic counters where they
were not needed (for lkb wait_count)
- Add comments around forced state reset for waiting lock operations
during recovery
* tag 'dlm-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
dlm: add comments about forced waiters reset
dlm: revert atomic_t lkb_wait_count
dlm: fix user space lkb refcounting
Main user visible change:
- User events can now have "multi formats"
The current user events have a single format. If another event is created
with a different format, it will fail to be created. That is, once an
event name is used, it cannot be used again with a different format. This
can cause issues if a library is using an event and updates its format.
An application using the older format will prevent an application using
the new library from registering its event.
A task could also DOS another application if it knows the event names, and
it creates events with different formats.
The multi-format event is in a different name space from the single
format. Both the event name and its format are the unique identifier.
This will allow two different applications to use the same user event name
but with different payloads.
- Added support to have ftrace_dump_on_oops dump out instances and
not just the main top level tracing buffer.
Other changes:
- Add eventfs_root_inode
Only the root inode has a dentry that is static (never goes away) and
stores it upon creation. There's no reason that the thousands of other
eventfs inodes should have a pointer that never gets set in its
descriptor. Create a eventfs_root_inode desciptor that has a eventfs_inode
descriptor and a dentry pointer, and only the root inode will use this.
- Added WARN_ON()s in eventfs
There's some conditionals remaining in eventfs that should never be hit,
but instead of removing them, add WARN_ON() around them to make sure that
they are never hit.
- Have saved_cmdlines allocation also include the map_cmdline_to_pid array
The saved_cmdlines structure allocates a large amount of data to hold its
mappings. Within it, it has three arrays. Two are already apart of it:
map_pid_to_cmdline[] and saved_cmdlines[]. More memory can be saved by
also including the map_cmdline_to_pid[] array as well.
- Restructure __string() and __assign_str() macros used in TRACE_EVENT().
Dynamic strings in TRACE_EVENT() are declared with:
__string(name, source)
And assigned with:
__assign_str(name, source)
In the tracepoint callback of the event, the __string() is used to get the
size needed to allocate on the ring buffer and __assign_str() is used to
copy the string into the ring buffer. There's a helper structure that is
created in the TRACE_EVENT() macro logic that will hold the string length
and its position in the ring buffer which is created by __string().
There are several trace events that have a function to create the string
to save. This function is executed twice. Once for __string() and again
for __assign_str(). There's no reason for this. The helper structure could
also save the string it used in __string() and simply copy that into
__assign_str() (it also already has its length).
By using the structure to store the source string for the assignment, it
means that the second argument to __assign_str() is no longer needed.
It will be removed in the next merge window, but for now add a warning if
the source string given to __string() is different than the source string
given to __assign_str(), as the source to __assign_str() isn't even used
and will be going away.
- Added checks to make sure that the source of __string() is also the
source of __assign_str() so that it can be safely removed in the next
merge window.
Included fixes that the above check found.
- Other minor clean ups and fixes
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Merge tag 'trace-v6.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull tracing updates from Steven Rostedt:
"Main user visible change:
- User events can now have "multi formats"
The current user events have a single format. If another event is
created with a different format, it will fail to be created. That
is, once an event name is used, it cannot be used again with a
different format. This can cause issues if a library is using an
event and updates its format. An application using the older format
will prevent an application using the new library from registering
its event.
A task could also DOS another application if it knows the event
names, and it creates events with different formats.
The multi-format event is in a different name space from the single
format. Both the event name and its format are the unique
identifier. This will allow two different applications to use the
same user event name but with different payloads.
- Added support to have ftrace_dump_on_oops dump out instances and
not just the main top level tracing buffer.
Other changes:
- Add eventfs_root_inode
Only the root inode has a dentry that is static (never goes away)
and stores it upon creation. There's no reason that the thousands
of other eventfs inodes should have a pointer that never gets set
in its descriptor. Create a eventfs_root_inode desciptor that has a
eventfs_inode descriptor and a dentry pointer, and only the root
inode will use this.
- Added WARN_ON()s in eventfs
There's some conditionals remaining in eventfs that should never be
hit, but instead of removing them, add WARN_ON() around them to
make sure that they are never hit.
- Have saved_cmdlines allocation also include the map_cmdline_to_pid
array
The saved_cmdlines structure allocates a large amount of data to
hold its mappings. Within it, it has three arrays. Two are already
apart of it: map_pid_to_cmdline[] and saved_cmdlines[]. More memory
can be saved by also including the map_cmdline_to_pid[] array as
well.
- Restructure __string() and __assign_str() macros used in
TRACE_EVENT()
Dynamic strings in TRACE_EVENT() are declared with:
__string(name, source)
And assigned with:
__assign_str(name, source)
In the tracepoint callback of the event, the __string() is used to
get the size needed to allocate on the ring buffer and
__assign_str() is used to copy the string into the ring buffer.
There's a helper structure that is created in the TRACE_EVENT()
macro logic that will hold the string length and its position in
the ring buffer which is created by __string().
There are several trace events that have a function to create the
string to save. This function is executed twice. Once for
__string() and again for __assign_str(). There's no reason for
this. The helper structure could also save the string it used in
__string() and simply copy that into __assign_str() (it also
already has its length).
By using the structure to store the source string for the
assignment, it means that the second argument to __assign_str() is
no longer needed.
It will be removed in the next merge window, but for now add a
warning if the source string given to __string() is different than
the source string given to __assign_str(), as the source to
__assign_str() isn't even used and will be going away.
- Added checks to make sure that the source of __string() is also the
source of __assign_str() so that it can be safely removed in the
next merge window.
Included fixes that the above check found.
- Other minor clean ups and fixes"
* tag 'trace-v6.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (34 commits)
tracing: Add __string_src() helper to help compilers not to get confused
tracing: Use strcmp() in __assign_str() WARN_ON() check
tracepoints: Use WARN() and not WARN_ON() for warnings
tracing: Use div64_u64() instead of do_div()
tracing: Support to dump instance traces by ftrace_dump_on_oops
tracing: Remove second parameter to __assign_rel_str()
tracing: Add warning if string in __assign_str() does not match __string()
tracing: Add __string_len() example
tracing: Remove __assign_str_len()
ftrace: Fix most kernel-doc warnings
tracing: Decrement the snapshot if the snapshot trigger fails to register
tracing: Fix snapshot counter going between two tracers that use it
tracing: Use EVENT_NULL_STR macro instead of open coding "(null)"
tracing: Use ? : shortcut in trace macros
tracing: Do not calculate strlen() twice for __string() fields
tracing: Rework __assign_str() and __string() to not duplicate getting the string
cxl/trace: Properly initialize cxl_poison region name
net: hns3: tracing: fix hclgevf trace event strings
drm/i915: Add missing ; to __assign_str() macros in tracepoint code
NFSD: Fix nfsd_clid_class use of __string_len() macro
...
The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was
removed as of v6.8-rc1, so it became a dead flag since the commit
16a1d968358a ("mm/slab: remove mm/slab.c and slab_def.h"). And the
series [1] went on to mark it obsolete to avoid confusion for users.
Here we can just remove all its users, which has no functional change.
[1] https://lore.kernel.org/all/20240223-slab-cleanup-flags-v2-1-02f1753e8303@suse.cz/
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
In some cases this may take a long time and will block renewing
the caps to MDS.
[ idryomov: massage comment ]
Link: https://tracker.ceph.com/issues/50223#note-21
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Fix:
Julia Lawall pointed out a null pointer dereference.
Cleanup:
Vlastimil Babka sent me a patch to remove some SLAB related code.
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Merge tag 'for-linus-6.9-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux
Pull orangefs updates from Mike Marshall:
"One fix, one cleanup...
Fix: Julia Lawall pointed out a null pointer dereference.
Cleanup: Vlastimil Babka sent me a patch to remove some SLAB related
code"
* tag 'for-linus-6.9-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
Julia Lawall reported this null pointer dereference, this should fix it.
fs/orangefs: remove ORANGEFS_CACHE_CREATE_FLAGS
In this round, there are a number of updates on mainly two areas: Zoned block
device support and Per-file compression. For example, we've found several issues
to support Zoned block device especially having large sections regarding to GC
and file pinning used for Android devices. In compression side, we've fixed many
corner race conditions that had broken the design assumption.
Enhancement:
- Support file pinning for Zoned block device having large section
- Enhance the data recovery after sudden power cut on Zoned block device
- Add more error injection cases to easily detect the kernel panics
- add a proc entry show the entire disk layout
- Improve various error paths paniced by BUG_ON in block allocation and GC
- support SEEK_DATA and SEEK_HOLE for compression files
Bug fix:
- fix to avoid use-after-free issue in f2fs_filemap_fault
- fix some race conditions to break the atomic write design assumption
- fix to truncate meta inode pages forcely
- resolve various per-file compression issues wrt the space management and
compression policies
- fix some swap-related bugs
In addition, we removed deprecated codes such as io_bits and heap_allocation,
and also fixed minor error handling routines with neat debugging messages.
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Merge tag 'f2fs-for-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs update from Jaegeuk Kim:
"In this round, there are a number of updates on mainly two areas:
Zoned block device support and Per-file compression. For example,
we've found several issues to support Zoned block device especially
having large sections regarding to GC and file pinning used for
Android devices. In compression side, we've fixed many corner race
conditions that had broken the design assumption.
Enhancements:
- Support file pinning for Zoned block device having large section
- Enhance the data recovery after sudden power cut on Zoned block
device
- Add more error injection cases to easily detect the kernel panics
- add a proc entry show the entire disk layout
- Improve various error paths paniced by BUG_ON in block allocation
and GC
- support SEEK_DATA and SEEK_HOLE for compression files
Bug fixes:
- avoid use-after-free issue in f2fs_filemap_fault
- fix some race conditions to break the atomic write design
assumption
- fix to truncate meta inode pages forcely
- resolve various per-file compression issues wrt the space
management and compression policies
- fix some swap-related bugs
In addition, we removed deprecated codes such as io_bits and
heap_allocation, and also fixed minor error handling routines with
neat debugging messages"
* tag 'f2fs-for-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (60 commits)
f2fs: fix to avoid use-after-free issue in f2fs_filemap_fault
f2fs: truncate page cache before clearing flags when aborting atomic write
f2fs: mark inode dirty for FI_ATOMIC_COMMITTED flag
f2fs: prevent atomic write on pinned file
f2fs: fix to handle error paths of {new,change}_curseg()
f2fs: unify the error handling of f2fs_is_valid_blkaddr
f2fs: zone: fix to remove pow2 check condition for zoned block device
f2fs: fix to truncate meta inode pages forcely
f2fs: compress: fix reserve_cblocks counting error when out of space
f2fs: compress: relocate some judgments in f2fs_reserve_compress_blocks
f2fs: add a proc entry show disk layout
f2fs: introduce SEGS_TO_BLKS/BLKS_TO_SEGS for cleanup
f2fs: fix to check return value of f2fs_gc_range
f2fs: fix to check return value __allocate_new_segment
f2fs: fix to do sanity check in update_sit_entry
f2fs: fix to reset fields for unloaded curseg
f2fs: clean up new_curseg()
f2fs: relocate f2fs_precache_extents() in f2fs_swap_activate()
f2fs: fix blkofs_end correctly in f2fs_migrate_blocks()
f2fs: ro: don't start discard thread for readonly image
...
There are reports that since version 6.7 update-grub fails to find the
device of the root on systems without initrd and on a single device.
This looks like the device name changed in the output of
/proc/self/mountinfo:
6.5-rc5 working
18 1 0:16 / / rw,noatime - btrfs /dev/sda8 ...
6.7 not working:
17 1 0:15 / / rw,noatime - btrfs /dev/root ...
and "update-grub" shows this error:
/usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?)
This looks like it's related to the device name, but grub-probe
recognizes the "/dev/root" path and tries to find the underlying device.
However there's a special case for some filesystems, for btrfs in
particular.
The generic root device detection heuristic is not done and it all
relies on reading the device infos by a btrfs specific ioctl. This ioctl
returns the device name as it was saved at the time of device scan (in
this case it's /dev/root).
The change in 6.7 for temp_fsid to allow several single device
filesystem to exist with the same fsid (and transparently generate a new
UUID at mount time) was to skip caching/registering such devices.
This also skipped mounted device. One step of scanning is to check if
the device name hasn't changed, and if yes then update the cached value.
This broke the grub-probe as it always read the device /dev/root and
couldn't find it in the system. A temporary workaround is to create a
symlink but this does not survive reboot.
The right fix is to allow updating the device path of a mounted
filesystem even if this is a single device one.
In the fix, check if the device's major:minor number matches with the
cached device. If they do, then we can allow the scan to happen so that
device_list_add() can take care of updating the device path. The file
descriptor remains unchanged.
This does not affect the temp_fsid feature, the UUID of the mounted
filesystem remains the same and the matching is based on device major:minor
which is unique per mounted filesystem.
This covers the path when the device (that exists for all mounted
devices) name changes, updating /dev/root to /dev/sdx. Any other single
device with filesystem and is not mounted is still skipped.
Note that if a system is booted and initial mount is done on the
/dev/root device, this will be the cached name of the device. Only after
the command "btrfs device scan" it will change as it triggers the
rename.
The fix was verified by users whose systems were affected.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=218353
Link: https://lore.kernel.org/lkml/CAKLYgeJ1tUuqLcsquwuFqjDXPSJpEiokrWK2gisPKDZLs8Y2TQ@mail.gmail.com/
Fixes: bc27d6f0aa0e ("btrfs: scan but don't register device on single device filesystem")
CC: stable@vger.kernel.org # 6.7+
Tested-by: Alex Romosan <aromosan@gmail.com>
Tested-by: CHECK_1234543212345@protonmail.com
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Merge tag 'vfs-6.9-rc1.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs fixes from Christian Brauner:
"This contains a few small fixes for this merge window:
- Undo the hiding of silly-rename files in afs. If they're hidden
they can't be deleted by rm manually anymore causing regressions
- Avoid caching the preferred address for an afs server to avoid
accidently overriding an explicitly specified preferred server
address
- Fix bad stat() and rmdir() interaction in afs
- Take a passive reference on the superblock when opening a block
device so the holder is available to concurrent callers from the
block layer
- Clear private data pointer in fscache_begin_operation() to avoid it
being falsely treated as valid"
* tag 'vfs-6.9-rc1.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
fscache: Fix error handling in fscache_begin_operation()
fs,block: get holder during claim
afs: Fix occasional rmdir-then-VNOVNODE with generic/011
afs: Don't cache preferred address
afs: Revert "afs: Hide silly-rename files from userspace"
Now that __assign_str() gets the length from the __string() (and
__string_len()) macros, there's no reason to have a separate
__assign_str_len() macro as __assign_str() can get the length of the
string needed.
Also remove __assign_rel_str() although it had no users anyway.
Link: https://lore.kernel.org/linux-trace-kernel/20240223152206.0b650659@gandalf.local.home
Cc: Jeff Layton <jlayton@kernel.org>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
I'm working on restructuring the __string* macros so that it doesn't need
to recalculate the string twice. That is, it will save it off when
processing __string() and the __assign_str() will not need to do the work
again as it currently does.
Currently __string_len(item, src, len) doesn't actually use "src", but my
changes will require src to be correct as that is where the __assign_str()
will get its value from.
The event class nfsd_clid_class has:
__string_len(name, name, clp->cl_name.len)
But the second "name" does not exist and causes my changes to fail to
build. That second parameter should be: clp->cl_name.data.
Link: https://lore.kernel.org/linux-trace-kernel/20240222122828.3d8d213c@gandalf.local.home
Cc: Neil Brown <neilb@suse.de>
Cc: Olga Kornievskaia <kolga@netapp.com>
Cc: Dai Ngo <Dai.Ngo@oracle.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: stable@vger.kernel.org
Fixes: d27b74a8675ca ("NFSD: Use new __string_len C macros for nfsd_clid_class")
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Fix fscache_begin_operation() to clear cres->cache_priv on error, otherwise
fscache_resources_valid() will report it as being valid.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/3933237.1710514106@warthog.procyon.org.uk
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reported-by: Marc Dionne <marc.dionne@auristor.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Now that we open block devices as files we need to deal with the
realities that closing is a deferred operation. An operation on the
block device such as e.g., freeze, thaw, or removal that runs
concurrently with umount, tries to acquire a stable reference on the
holder. The holder might already be gone though. Make that reliable by
grabbing a passive reference to the holder during bdev_open() and
releasing it during bdev_release().
Fixes: f3a608827d1f ("bdev: open block device as files") # mainline only
Reported-by: Christoph Hellwig <hch@infradead.org>
Link: https://lore.kernel.org/r/ZfEQQ9jZZVes0WCZ@infradead.org
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@infradead.org>
Tested-by: Yi Zhang <yi.zhang@redhat.com>
Reported-by: https://lore.kernel.org/r/CAHj4cs8tbDwKRwfS1=DmooP73ysM__xAb2PQc6XsAmWR+VuYmg@mail.gmail.com
Link: https://lore.kernel.org/r/20240315-freibad-annehmbar-ca68c375af91@brauner
Signed-off-by: Christian Brauner <brauner@kernel.org>
check_topology() doesn't actually require alloc info - and running it
first means other passes don't have to catch btree read errors.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
this fixes an assertion pop in
bch2_check_snapshot_trees() ->
check_snapshot_tree() ->
bch2_snapshot_tree_master_subvol() ->
bch2_snapshot_is_ancestor()
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Nested transaction restart handling is typically best avoided; when the
inner context handles a transaction restart it invalidates the outer
transaction context, so we need to make sure to return a
transaction_restart_nested error.
This code wasn't doing that, and hit the assertion in
for_each_btree_key() that checks for that via trans->restart_count.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This fixes a deadlock due to using btree_interior_update_worker for non
interior updates - async btree node rewrites were blocking, and then
blocking other interior updates.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
After keys have passed bkey_ops.key_invalid we should never see invalid
extent entry types - but .key_invalid itself needs to cope with them.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
We only need to return transaction_restart_nested when we're inside a
context that's handling transaction restarts.
Also, add a missing check_subdir_count() call.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This doesn't need to be a BUG_ON(); the actual serious "things break"
condition is if the whole journal write overruns the available space,
and that has a fatal error, not a BUG_ON(). This check indicates we
screwed something up, but it should be a warning.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
If ->NameOffset of smb2_create_req is smaller than Buffer offset of
smb2_create_req, slab-out-of-bounds read can happen from smb2_open.
This patch set the minimum value of the name offset to the buffer offset
to validate name length of smb2_create_req().
Cc: stable@vger.kernel.org
Reported-by: Xuanzhe Yu <yuxuanzhe@outlook.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
syzbot hit an assertion in copy up data loop which looks like it is
the result of a lower file whose size is being changed underneath
overlayfs.
This type of use case is documented to cause undefined behavior, so
returning EIO error for the copy up makes sense, but it should not be
causing a WARN_ON assertion.
Reported-and-tested-by: syzbot+3abd99031b42acf367ef@syzkaller.appspotmail.com
Fixes: ca7ab482401c ("ovl: add permission hooks outside of do_splice_direct()")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Only the root "events" directory stores a dentry. There's no reason to
hold a dentry pointer for every eventfs_inode as it is never set except
for the root "events" eventfs_inode.
Create a eventfs_root_inode structure that holds the events_dir dentry.
The "events" eventfs_inode *is* special, let it have its own descriptor.
Link: https://lore.kernel.org/linux-trace-kernel/20240201161617.658992558@goodmis.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Ajay Kaher <ajay.kaher@broadcom.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
There's a couple of if statements in eventfs_root_lookup() that should
never be true. Instead of removing them, add WARN_ON_ONCE() around them.
One is a tracefs_inode not being for eventfs.
The other is a child being freed but still on the parent's children
list. When a child is freed, it is removed from the list under the
same mutex that is held during the iteration.
Link: https://lore.kernel.org/linux-trace-kernel/20240201002719.GS2087318@ZenIV/
Link: https://lore.kernel.org/linux-trace-kernel/20240201123346.724afa46@gandalf.local.home
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ajay Kaher <ajay.kaher@broadcom.com>
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Highlights include:
Bugfixes:
- Fix for an Oops in the NFSv4.2 listxattr handler
- Correct an incorrect buffer size in listxattr
- Fix for an Oops in the pNFS flexfiles layout
- Fix a refcount leak in NFS O_DIRECT writes
- Fix missing locking in NFS O_DIRECT
- Avoid an infinite loop in pnfs_update_layout
- Fix an overflow in the RPC waitqueue queue length counter
- Ensure that pNFS I/O is also protected by TLS when xprtsec
is specified by the mount options
- Fix a leaked folio lock in the netfs read code
- Fix a potential deadlock in fscache
- Allow setting the fscache uniquifier in NFSv4
- Fix an off by one in root_nfs_cat()
- Fix another off by one in rpc_sockaddr2uaddr()
- nfs4_do_open() can incorrectly trigger state recovery.
- Various fixes for connection shutdown
Features and cleanups:
- Ensure that containers only see their own RPC and NFS stats
- Enable nconnect for RDMA
- Remove dead code from nfs_writepage_locked()
- Various tracepoint additions to track EXCHANGE_ID, GETDEVICEINFO, and
mount options.
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Merge tag 'nfs-for-6.9-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Highlights include:
Bugfixes:
- Fix for an Oops in the NFSv4.2 listxattr handler
- Correct an incorrect buffer size in listxattr
- Fix for an Oops in the pNFS flexfiles layout
- Fix a refcount leak in NFS O_DIRECT writes
- Fix missing locking in NFS O_DIRECT
- Avoid an infinite loop in pnfs_update_layout
- Fix an overflow in the RPC waitqueue queue length counter
- Ensure that pNFS I/O is also protected by TLS when xprtsec is
specified by the mount options
- Fix a leaked folio lock in the netfs read code
- Fix a potential deadlock in fscache
- Allow setting the fscache uniquifier in NFSv4
- Fix an off by one in root_nfs_cat()
- Fix another off by one in rpc_sockaddr2uaddr()
- nfs4_do_open() can incorrectly trigger state recovery
- Various fixes for connection shutdown
Features and cleanups:
- Ensure that containers only see their own RPC and NFS stats
- Enable nconnect for RDMA
- Remove dead code from nfs_writepage_locked()
- Various tracepoint additions to track EXCHANGE_ID, GETDEVICEINFO,
and mount options"
* tag 'nfs-for-6.9-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (29 commits)
nfs: fix panic when nfs4_ff_layout_prepare_ds() fails
NFS: trace the uniquifier of fscache
NFS: Read unlock folio on nfs_page_create_from_folio() error
NFS: remove unused variable nfs_rpcstat
nfs: fix UAF in direct writes
nfs: properly protect nfs_direct_req fields
NFS: enable nconnect for RDMA
NFSv4: nfs4_do_open() is incorrectly triggering state recovery
NFS: avoid infinite loop in pnfs_update_layout.
NFS: remove sync_mode test from nfs_writepage_locked()
NFSv4.1/pnfs: fix NFS with TLS in pnfs
NFS: Fix an off by one in root_nfs_cat()
nfs: make the rpc_stat per net namespace
nfs: expose /proc/net/sunrpc/nfs in net namespaces
sunrpc: add a struct rpc_stats arg to rpc_create_args
nfs: remove unused NFS_CALL macro
NFSv4.1: add tracepoint to trunked nfs4_exchange_id calls
NFS: Fix nfs_netfs_issue_read() xarray locking for writeback interrupt
SUNRPC: increase size of rpc_wait_queue.qlen from unsigned short to unsigned int
nfs: fix regression in handling of fsc= option in NFSv4
...
We've been seeing the following panic in production
BUG: kernel NULL pointer dereference, address: 0000000000000065
PGD 2f485f067 P4D 2f485f067 PUD 2cc5d8067 PMD 0
RIP: 0010:ff_layout_cancel_io+0x3a/0x90 [nfs_layout_flexfiles]
Call Trace:
<TASK>
? __die+0x78/0xc0
? page_fault_oops+0x286/0x380
? __rpc_execute+0x2c3/0x470 [sunrpc]
? rpc_new_task+0x42/0x1c0 [sunrpc]
? exc_page_fault+0x5d/0x110
? asm_exc_page_fault+0x22/0x30
? ff_layout_free_layoutreturn+0x110/0x110 [nfs_layout_flexfiles]
? ff_layout_cancel_io+0x3a/0x90 [nfs_layout_flexfiles]
? ff_layout_cancel_io+0x6f/0x90 [nfs_layout_flexfiles]
pnfs_mark_matching_lsegs_return+0x1b0/0x360 [nfsv4]
pnfs_error_mark_layout_for_return+0x9e/0x110 [nfsv4]
? ff_layout_send_layouterror+0x50/0x160 [nfs_layout_flexfiles]
nfs4_ff_layout_prepare_ds+0x11f/0x290 [nfs_layout_flexfiles]
ff_layout_pg_init_write+0xf0/0x1f0 [nfs_layout_flexfiles]
__nfs_pageio_add_request+0x154/0x6c0 [nfs]
nfs_pageio_add_request+0x26b/0x380 [nfs]
nfs_do_writepage+0x111/0x1e0 [nfs]
nfs_writepages_callback+0xf/0x30 [nfs]
write_cache_pages+0x17f/0x380
? nfs_pageio_init_write+0x50/0x50 [nfs]
? nfs_writepages+0x6d/0x210 [nfs]
? nfs_writepages+0x6d/0x210 [nfs]
nfs_writepages+0x125/0x210 [nfs]
do_writepages+0x67/0x220
? generic_perform_write+0x14b/0x210
filemap_fdatawrite_wbc+0x5b/0x80
file_write_and_wait_range+0x6d/0xc0
nfs_file_fsync+0x81/0x170 [nfs]
? nfs_file_mmap+0x60/0x60 [nfs]
__x64_sys_fsync+0x53/0x90
do_syscall_64+0x3d/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
Inspecting the core with drgn I was able to pull this
>>> prog.crashed_thread().stack_trace()[0]
#0 at 0xffffffffa079657a (ff_layout_cancel_io+0x3a/0x84) in ff_layout_cancel_io at fs/nfs/flexfilelayout/flexfilelayout.c:2021:27
>>> prog.crashed_thread().stack_trace()[0]['idx']
(u32)1
>>> prog.crashed_thread().stack_trace()[0]['flseg'].mirror_array[1].mirror_ds
(struct nfs4_ff_layout_ds *)0xffffffffffffffed
This is clear from the stack trace, we call nfs4_ff_layout_prepare_ds()
which could error out initializing the mirror_ds, and then we go to
clean it all up and our check is only for if (!mirror->mirror_ds). This
is inconsistent with the rest of the users of mirror_ds, which have
if (IS_ERR_OR_NULL(mirror_ds))
to keep from tripping over this exact scenario. Fix this up in
ff_layout_cancel_io() to make sure we don't panic when we get an error.
I also spot checked all the other instances of checking mirror_ds and we
appear to be doing the correct checks everywhere, only unconditionally
dereferencing mirror_ds when we know it would be valid.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Fixes: b739a5bd9d9f ("NFSv4/flexfiles: Cancel I/O if the layout is recalled or revoked")
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
When a lock is waiting for a reply for a remote operation, and recovery
interrupts this "waiters" state, the remote operation is voided by the
recovery, and no reply will be processed. The lkb waiters state for the
remote operation is forcibly reset/cleared, so that the lock operation
can be restarted after recovery. Improve the comments describing this.
Signed-off-by: David Teigland <teigland@redhat.com>
Revert "fs: dlm: handle lkb wait count as atomic_t"
This reverts commit 75a7d60134ce84209f2c61ec4619ee543aa8f466.
This counter does not need to be atomic. As the comment in
the reverted commit mentions, the counter is protected by
the rsb lock.
Signed-off-by: David Teigland <teigland@redhat.com>
This pull request includes a number of patches
addressing improvements in the cache portions of the 9p
client.
The biggest improvements have to do with fixing handling
of inodes and eliminating duplicate structures and unnecessary
allocation/release of inode structures and many associated
unnecessary protocol traffic. This also dramatically
reduced code complexity across the code and sets us up to add
proper temporal cache capabilities.
Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
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Merge tag '9p-for-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
Pull 9p updates from Eric Van Hensbergen:
"This includes a number of patches addressing improvements in the cache
portions of the 9p client.
The biggest improvements have to do with fixing handling of inodes and
eliminating duplicate structures and unnecessary allocation/release of
inode structures and many associated unnecessary protocol traffic.
This also dramatically reduced code complexity across the code and
sets us up to add proper temporal cache capabilities"
* tag '9p-for-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
fs/9p: fix dups even in uncached mode
fs/9p: simplify iget to remove unnecessary paths
fs/9p: rework qid2ino logic
fs/9p: Eliminate now unused v9fs_get_inode
fs/9p: Eliminate redundant non-cache path in mknod
fs/9p: remove walk and inode allocation from symlink
fs/9p: convert mkdir to use get_new_inode
fs/9p: switch vfsmount to use v9fs_get_new_inode
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Merge tag 'fuse-update-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
Pull fuse updates from Miklos Szeredi:
- Add passthrough mode for regular file I/O.
This allows performing read and write (also via memory maps) on a
backing file without incurring the overhead of roundtrips to
userspace. For now this is only allowed to privileged servers, but
this limitation will go away in the future (Amir Goldstein)
- Fix interaction of direct I/O mode with memory maps (Bernd Schubert)
- Export filesystem tags through sysfs for virtiofs (Stefan Hajnoczi)
- Allow resending queued requests for server crash recovery (Zhao Chen)
- Misc fixes and cleanups
* tag 'fuse-update-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: (38 commits)
fuse: get rid of ff->readdir.lock
fuse: remove unneeded lock which protecting update of congestion_threshold
fuse: Fix missing FOLL_PIN for direct-io
fuse: remove an unnecessary if statement
fuse: Track process write operations in both direct and writethrough modes
fuse: Use the high bit of request ID for indicating resend requests
fuse: Introduce a new notification type for resend pending requests
fuse: add support for explicit export disabling
fuse: __kuid_val/__kgid_val helpers in fuse_fill_attr_from_inode()
fuse: fix typo for fuse_permission comment
fuse: Convert fuse_writepage_locked to take a folio
fuse: Remove fuse_writepage
virtio_fs: remove duplicate check if queue is broken
fuse: use FUSE_ROOT_ID in fuse_get_root_inode()
fuse: don't unhash root
fuse: fix root lookup with nonzero generation
fuse: replace remaining make_bad_inode() with fuse_make_bad()
virtiofs: drop __exit from virtio_fs_sysfs_exit()
fuse: implement passthrough for mmap
fuse: implement splice read/write passthrough
...
tests.
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Merge tag 'ext4_for_linus-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 updates from Ted Ts'o:
"Ext4 bug fixes and cleanups, plus some additional kunit tests"
* tag 'ext4_for_linus-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (23 commits)
ext4: initialize sbi->s_freeclusters_counter and sbi->s_dirtyclusters_counter before use in kunit test
ext4: hold group lock in ext4 kunit test
ext4: alloc test super block from sget
ext4: kunit: use dynamic inode allocation
ext4: enable meta_bg only when new desc blocks are needed
ext4: remove unused parameter biop in ext4_issue_discard()
ext4: remove SLAB_MEM_SPREAD flag usage
ext4: verify s_clusters_per_group even without bigalloc
ext4: fix corruption during on-line resize
ext4: don't report EOPNOTSUPP errors from discard
ext4: drop duplicate ea_inode handling in ext4_xattr_block_set()
ext4: fold quota accounting into ext4_xattr_inode_lookup_create()
ext4: correct best extent lstart adjustment logic
ext4: forbid commit inconsistent quota data when errors=remount-ro
ext4: add a hint for block bitmap corrupt state in mb_groups
ext4: fix the comment of ext4_map_blocks()/ext4_ext_map_blocks()
ext4: improve error msg for ext4_mb_seq_groups_show
ext4: remove unused buddy_loaded in ext4_mb_seq_groups_show
ext4: Add unit test for ext4_mb_mark_diskspace_used
ext4: Add unit test for mb_free_blocks
...
- Subvolume children btree; this is needed for providing a userspace
interface for walking subvolumes, which will come later
- Lots of improvements to directory structure checking
- Improved journal pipelining, significantly improving performance on
high iodepth write workloads
- Discard path improvements: the discard path is more efficient, and no
longer flushes the journal unnecessarily
- Buffered write path can now avoid taking the inode lock
- new mm helper: memalloc_flags_{save|restore}
- mempool now does kvmalloc mempools
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Merge tag 'bcachefs-2024-03-13' of https://evilpiepirate.org/git/bcachefs
Pull bcachefs updates from Kent Overstreet:
- Subvolume children btree; this is needed for providing a userspace
interface for walking subvolumes, which will come later
- Lots of improvements to directory structure checking
- Improved journal pipelining, significantly improving performance on
high iodepth write workloads
- Discard path improvements: the discard path is more efficient, and no
longer flushes the journal unnecessarily
- Buffered write path can now avoid taking the inode lock
- new mm helper: memalloc_flags_{save|restore}
- mempool now does kvmalloc mempools
* tag 'bcachefs-2024-03-13' of https://evilpiepirate.org/git/bcachefs: (128 commits)
bcachefs: time_stats: shrink time_stat_buffer for better alignment
bcachefs: time_stats: split stats-with-quantiles into a separate structure
bcachefs: mean_and_variance: put struct mean_and_variance_weighted on a diet
bcachefs: time_stats: add larger units
bcachefs: pull out time_stats.[ch]
bcachefs: reconstruct_alloc cleanup
bcachefs: fix bch_folio_sector padding
bcachefs: Fix btree key cache coherency during replay
bcachefs: Always flush write buffer in delete_dead_inodes()
bcachefs: Fix order of gc_done passes
bcachefs: fix deletion of indirect extents in btree_gc
bcachefs: Prefer struct_size over open coded arithmetic
bcachefs: Kill unused flags argument to btree_split()
bcachefs: Check for writing superblocks with nonsense member seq fields
bcachefs: fix bch2_journal_buf_to_text()
lib/generic-radix-tree.c: Make nodes more reasonably sized
bcachefs: copy_(to|from)_user_errcode()
bcachefs: Split out bkey_types.h
bcachefs: fix lost journal buf wakeup due to improved pipelining
bcachefs: intercept mountoption value for bool type
...
In converting the XFS code from GFP_NOFS to scoped contexts, we
converted the quota radix tree to GFP_KERNEL. Unfortunately, it was
not clearly documented that this set was because there is a
dependency on the quotainfo->qi_tree_lock being taken in memory
reclaim to remove dquots from the radix tree.
In hindsight this is obvious, but the radix tree allocations on
insert are not immediately obvious, and we avoid this for the inode
cache radix trees by using preloading and hence completely avoiding
the radix tree node allocation under tree lock constraints.
Hence there are a few solutions here. The first is to reinstate
GFP_NOFS for the radix tree and add a comment explaining why
GFP_NOFS is used. The second is to use memalloc_nofs_save() on the
radix tree insert context, which makes it obvious that the radix
tree insert runs under GFP_NOFS constraints. The third option is to
simply replace the radix tree and it's lock with an xarray which can
do memory allocation safely in an insert context.
The first is OK, but not really the direction we want to head. The
second is my preferred short term solution. The third - converting
XFS radix trees to xarray - is the longer term solution.
Hence to fix the regression here, we take option 2 as it moves us in
the direction we want to head with memory allocation and GFP_NOFS
removal.
Reported-by: syzbot+8fdff861a781522bda4d@syzkaller.appspotmail.com
Reported-by: syzbot+d247769793ec169e4bf9@syzkaller.appspotmail.com
Fixes: 94a69db2367e ("xfs: use __GFP_NOLOCKDEP instead of GFP_NOFS")
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Fix some inconsistencies in the xmbuf tracepoints -- they should be
reporting the major/minor of the filesystem that they're associated
with, so that we have some clue on whose behalf the xmbuf was created.
Fix the xmbuf_free tracepoint to report the same.
Don't call the trace function until the xmbuf is fully initialized.
Fixes: 5076a6040ca1 ("xfs: support in-memory buffer cache target")
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
heap optimizations".
- Kuan-Wei Chiu has also sped up the library sorting code in the series
"lib/sort: Optimize the number of swaps and comparisons".
- Alexey Gladkov has added the ability for code running within an IPC
namespace to alter its IPC and MQ limits. The series is "Allow to
change ipc/mq sysctls inside ipc namespace".
- Geert Uytterhoeven has contributed some dhrystone maintenance work in
the series "lib: dhry: miscellaneous cleanups".
- Ryusuke Konishi continues nilfs2 maintenance work in the series
"nilfs2: eliminate kmap and kmap_atomic calls"
"nilfs2: fix kernel bug at submit_bh_wbc()"
- Nathan Chancellor has updated our build tools requirements in the
series "Bump the minimum supported version of LLVM to 13.0.1".
- Muhammad Usama Anjum continues with the selftests maintenance work in
the series "selftests/mm: Improve run_vmtests.sh".
- Oleg Nesterov has done some maintenance work against the signal code
in the series "get_signal: minor cleanups and fix".
Plus the usual shower of singleton patches in various parts of the tree.
Please see the individual changelogs for details.
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Merge tag 'mm-nonmm-stable-2024-03-14-09-36' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
- Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min
heap optimizations".
- Kuan-Wei Chiu has also sped up the library sorting code in the series
"lib/sort: Optimize the number of swaps and comparisons".
- Alexey Gladkov has added the ability for code running within an IPC
namespace to alter its IPC and MQ limits. The series is "Allow to
change ipc/mq sysctls inside ipc namespace".
- Geert Uytterhoeven has contributed some dhrystone maintenance work in
the series "lib: dhry: miscellaneous cleanups".
- Ryusuke Konishi continues nilfs2 maintenance work in the series
"nilfs2: eliminate kmap and kmap_atomic calls"
"nilfs2: fix kernel bug at submit_bh_wbc()"
- Nathan Chancellor has updated our build tools requirements in the
series "Bump the minimum supported version of LLVM to 13.0.1".
- Muhammad Usama Anjum continues with the selftests maintenance work in
the series "selftests/mm: Improve run_vmtests.sh".
- Oleg Nesterov has done some maintenance work against the signal code
in the series "get_signal: minor cleanups and fix".
Plus the usual shower of singleton patches in various parts of the tree.
Please see the individual changelogs for details.
* tag 'mm-nonmm-stable-2024-03-14-09-36' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (77 commits)
nilfs2: prevent kernel bug at submit_bh_wbc()
nilfs2: fix failure to detect DAT corruption in btree and direct mappings
ocfs2: enable ocfs2_listxattr for special files
ocfs2: remove SLAB_MEM_SPREAD flag usage
assoc_array: fix the return value in assoc_array_insert_mid_shortcut()
buildid: use kmap_local_page()
watchdog/core: remove sysctl handlers from public header
nilfs2: use div64_ul() instead of do_div()
mul_u64_u64_div_u64: increase precision by conditionally swapping a and b
kexec: copy only happens before uchunk goes to zero
get_signal: don't initialize ksig->info if SIGNAL_GROUP_EXIT/group_exec_task
get_signal: hide_si_addr_tag_bits: fix the usage of uninitialized ksig
get_signal: don't abuse ksig->info.si_signo and ksig->sig
const_structs.checkpatch: add device_type
Normalise "name (ad@dr)" MODULE_AUTHORs to "name <ad@dr>"
dyndbg: replace kstrdup() + strchr() with kstrdup_and_replace()
list: leverage list_is_head() for list_entry_is_head()
nilfs2: MAINTAINERS: drop unreachable project mirror site
smp: make __smp_processor_id() 0-argument macro
fat: fix uninitialized field in nostale filehandles
...
