Pull erofs fixes from Gao Xiang:
"One patch addresses a null-ptr-deref issue reported by syzbot weeks
ago, which is caused by the new long xattr name prefix feature and
needs to be fixed.
The remaining two patches are minor cleanups to avoid unnecessary
compilation and adjust per-cpu kworker configuration.
Summary:
- Fix null-ptr-deref related to long xattr name prefixes
- Avoid pcpubuf compilation if CONFIG_EROFS_FS_ZIP is off
- Use high priority kthreads by default if per-cpu kthread workers
are enabled"
* tag 'erofs-for-6.4-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
erofs: use HIPRI by default if per-cpu kthreads are enabled
erofs: avoid pcpubuf.c inclusion if CONFIG_EROFS_FS_ZIP is off
erofs: fix null-ptr-deref caused by erofs_xattr_prefixes_init
Pull NFS client fixes from Anna Schumaker:
"Stable Fix:
- Don't change task->tk_status after the call to rpc_exit_task
Other Bugfixes:
- Convert kmap_atomic() to kmap_local_folio()
- Fix a potential double free with READ_PLUS"
* tag 'nfs-for-6.4-2' of git://git.linux-nfs.org/projects/anna/linux-nfs:
NFSv4.2: Fix a potential double free with READ_PLUS
SUNRPC: Don't change task->tk_status after the call to rpc_exit_task
NFS: Convert kmap_atomic() to kmap_local_folio()
Pull ksmbd server fixes from Steve French:
- two fixes for incorrect SMB3 message validation (one for client which
uses 8 byte padding, and one for empty bcc)
- two fixes for out of bounds bugs: one for username offset checks (in
session setup) and the other for create context name length checks in
open requests
* tag '6.4-rc2-ksmbd-server-fixes' of git://git.samba.org/ksmbd:
ksmbd: smb2: Allow messages padded to 8byte boundary
ksmbd: allocate one more byte for implied bcc[0]
ksmbd: fix wrong UserName check in session_user
ksmbd: fix global-out-of-bounds in smb2_find_context_vals
Pull cifs client fixes from Steve French:
"Two smb3 client fixes, both related to deferred close, and also for
stable:
- send close for deferred handles before not after lease break
response to avoid possible sharing violations
- check all opens on an inode (looking for deferred handles) when
lease break is returned not just the handle the lease break came in
on"
* tag '6.4-rc2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
SMB3: drop reference to cfile before sending oplock break
SMB3: Close all deferred handles of inode in case of handle lease break
kfree()-ing the scratch page isn't enough, we also need to set the pointer
back to NULL to avoid a double-free in the case of a resend.
Fixes: fbd2a05f29 (NFSv4.2: Rework scratch handling for READ_PLUS)
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
kmap_atomic() is deprecated in favor of kmap_local_{folio,page}().
Therefore, replace kmap_atomic() with kmap_local_folio() in
nfs_readdir_folio_array_append().
kmap_atomic() disables page-faults and preemption (the latter only for
!PREEMPT_RT kernels), However, the code within the mapping/un-mapping in
nfs_readdir_folio_array_append() does not depend on the above-mentioned
side effects.
Therefore, a mere replacement of the old API with the new one is all that
is required (i.e., there is no need to explicitly add any calls to
pagefault_disable() and/or preempt_disable()).
Tested with (x)fstests in a QEMU/KVM x86_32 VM, 6GB RAM, booting a kernel
with HIGHMEM64GB enabled.
Cc: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Fixes: ec108d3cc7 ("NFS: Convert readdir page array functions to use a folio")
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Pull ceph fixes from Ilya Dryomov:
"A workaround for a just discovered bug in MClientSnap encoding which
goes back to 2017 (marked for stable) and a fixup to quieten a static
checker"
* tag 'ceph-for-6.4-rc3' of https://github.com/ceph/ceph-client:
ceph: force updating the msg pointer in non-split case
ceph: silence smatch warning in reconnect_caps_cb()
Pull s390 fixes from Alexander Gordeev:
- Add check whether the required facilities are installed before using
the s390-specific ChaCha20 implementation
- Key blobs for s390 protected key interface IOCTLs commands
PKEY_VERIFYKEY2 and PKEY_VERIFYKEY3 may contain clear key material.
Zeroize copies of these keys in kernel memory after creating
protected keys
- Set CONFIG_INIT_STACK_NONE=y in defconfigs to avoid extra overhead of
initializing all stack variables by default
- Make sure that when a new channel-path is enabled all subchannels are
evaluated: with and without any devices connected on it
- When SMT thread CPUs are added to CPU topology masks the nr_cpu_ids
limit is not checked and could be exceeded. Respect the nr_cpu_ids
limit and avoid a warning when CONFIG_DEBUG_PER_CPU_MAPS is set
- The pointer to IPL Parameter Information Block is stored in the
absolute lowcore as a virtual address. Save it as the physical
address for later use by dump tools
- Fix a Queued Direct I/O (QDIO) problem on z/VM guests using QIOASSIST
with dedicated (pass through) QDIO-based devices such as FCP, real
OSA or HiperSockets
- s390's struct statfs and struct statfs64 contain padding, which
field-by-field copying does not set. Initialize the respective
structures with zeros before filling them and copying to userspace
- Grow s390 compat_statfs64, statfs and statfs64 structures f_spare
array member to cover padding and simplify things
- Remove obsolete SCHED_BOOK and SCHED_DRAWER configs
- Remove unneeded S390_CCW_IOMMU and S390_AP_IOM configs
* tag 's390-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/iommu: get rid of S390_CCW_IOMMU and S390_AP_IOMMU
s390/Kconfig: remove obsolete configs SCHED_{BOOK,DRAWER}
s390/uapi: cover statfs padding by growing f_spare
statfs: enforce statfs[64] structure initialization
s390/qdio: fix do_sqbs() inline assembly constraint
s390/ipl: fix IPIB virtual vs physical address confusion
s390/topology: honour nr_cpu_ids when adding CPUs
s390/cio: include subchannels without devices also for evaluation
s390/defconfigs: set CONFIG_INIT_STACK_NONE=y
s390/pkey: zeroize key blobs
s390/crypto: use vector instructions only if available for ChaCha20
Pull misc fixes from Andrew Morton:
"Eight hotfixes. Four are cc:stable, the other four are for post-6.4
issues, or aren't considered suitable for backporting"
* tag 'mm-hotfixes-stable-2023-05-18-15-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
MAINTAINERS: Cleanup Arm Display IP maintainers
MAINTAINERS: repair pattern in DIALOG SEMICONDUCTOR DRIVERS
nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()
mm: fix zswap writeback race condition
mm: kfence: fix false positives on big endian
zsmalloc: move LRU update from zs_map_object() to zs_malloc()
mm: shrinkers: fix race condition on debugfs cleanup
maple_tree: make maple state reusable after mas_empty_area()
Smatch static checker warning:
fs/ceph/mds_client.c:3968 reconnect_caps_cb()
warn: missing error code here? '__get_cap_for_mds()' failed. 'err' = '0'
[ idryomov: Dan says that Smatch considers it intentional only if the
"ret = 0;" assignment is within 4 or 5 lines of the goto. ]
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
In cifs_oplock_break function we drop reference to a cfile at
the end of function, due to which close command goes on wire
after lease break acknowledgment even if file is already closed
by application but we had deferred the handle close.
If other client with limited file shareaccess waiting on lease
break ack proceeds operation on that file as soon as first client
sends ack, then we may encounter status sharing violation error
because of open handle.
Solution is to put reference to cfile(send close on wire if last ref)
and then send oplock acknowledgment to server.
Fixes: 9e31678fb4 ("SMB3: fix lease break timeout when multiple deferred close handles for the same file.")
Cc: stable@kernel.org
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Oplock break may occur for different file handle than the deferred
handle. Check for inode deferred closes list, if it's not empty then
close all the deferred handles of inode because we should not cache
handles if we dont have handle lease.
Eg: If openfilelist has one deferred file handle and another open file
handle from app for a same file, then on a lease break we choose the
first handle in openfile list. The first handle in list can be deferred
handle or actual open file handle from app. In case if it is actual open
handle then today, we don't close deferred handles if we lose handle lease
on a file. Problem with this is, later if app decides to close the existing
open handle then we still be caching deferred handles until deferred close
timeout. Leaving open handle may result in sharing violation when windows
client tries to open a file with limited file share access.
So we should check for deferred list of inode and walk through the list of
deferred files in inode and close all deferred files.
Fixes: 9e31678fb4 ("SMB3: fix lease break timeout when multiple deferred close handles for the same file.")
Cc: stable@kernel.org
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Pull nfsd fixes from Chuck Lever:
- A collection of minor bug fixes
* tag 'nfsd-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
NFSD: Remove open coding of string copy
SUNRPC: Fix trace_svc_register() call site
SUNRPC: always free ctxt when freeing deferred request
SUNRPC: double free xprt_ctxt while still in use
SUNRPC: Fix error handling in svc_setup_socket()
SUNRPC: Fix encoding of accepted but unsuccessful RPC replies
lockd: define nlm_port_min,max with CONFIG_SYSCTL
nfsd: define exports_proc_ops with CONFIG_PROC_FS
SUNRPC: Avoid relying on crypto API to derive CBC-CTS output IV
s390's struct statfs and struct statfs64 contain padding, which
field-by-field copying does not set. Initialize the respective structs
with zeros before filling them and copying them to userspace, like it's
already done for the compat versions of these structs.
Found by KMSAN.
[agordeev@linux.ibm.com: fixed typo in patch description]
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lore.kernel.org/r/20230504144021.808932-2-iii@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
clc length is now accepted to <= 8 less than length,
rather than < 8.
Solve issues on some of Axis's smb clients which send
messages where clc length is 8 bytes less than length.
The specific client was running kernel 4.19.217 with
smb dialect 3.0.2 on armv7l.
Cc: stable@vger.kernel.org
Signed-off-by: Gustav Johansson <gustajo@axis.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
ksmbd_smb2_check_message allows client to return one byte more, so we
need to allocate additional memory in ksmbd_conn_handler_loop to avoid
out-of-bound access.
Cc: stable@vger.kernel.org
Signed-off-by: Chih-Yen Chang <cc85nod@gmail.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Pull ext4 fixes from Ted Ts'o:
"Some ext4 bug fixes (mostly to address Syzbot reports)"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: bail out of ext4_xattr_ibody_get() fails for any reason
ext4: add bounds checking in get_max_inline_xattr_value_size()
ext4: add indication of ro vs r/w mounts in the mount message
ext4: fix deadlock when converting an inline directory in nojournal mode
ext4: improve error recovery code paths in __ext4_remount()
ext4: improve error handling from ext4_dirhash()
ext4: don't clear SB_RDONLY when remounting r/w until quota is re-enabled
ext4: check iomap type only if ext4_iomap_begin() does not fail
ext4: avoid a potential slab-out-of-bounds in ext4_group_desc_csum
ext4: fix data races when using cached status extents
ext4: avoid deadlock in fs reclaim with page writeback
ext4: fix invalid free tracking in ext4_xattr_move_to_block()
ext4: remove a BUG_ON in ext4_mb_release_group_pa()
ext4: allow ext4_get_group_info() to fail
ext4: fix lockdep warning when enabling MMP
ext4: fix WARNING in mb_find_extent
In ext4_update_inline_data(), if ext4_xattr_ibody_get() fails for any
reason, it's best if we just fail as opposed to stumbling on,
especially if the failure is EFSCORRUPTED.
Cc: stable@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Whether the file system is mounted read-only or read/write is more
important than the quota mode, which we are already printing. Add the
ro vs r/w indication since this can be helpful in debugging problems
from the console log.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
If there are failures while changing the mount options in
__ext4_remount(), we need to restore the old mount options.
This commit fixes two problem. The first is there is a chance that we
will free the old quota file names before a potential failure leading
to a use-after-free. The second problem addressed in this commit is
if there is a failed read/write to read-only transition, if the quota
has already been suspended, we need to renable quota handling.
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230506142419.984260-2-tytso@mit.edu
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
When a file system currently mounted read/only is remounted
read/write, if we clear the SB_RDONLY flag too early, before the quota
is initialized, and there is another process/thread constantly
attempting to create a directory, it's possible to trigger the
WARN_ON_ONCE(dquot_initialize_needed(inode));
in ext4_xattr_block_set(), with the following stack trace:
WARNING: CPU: 0 PID: 5338 at fs/ext4/xattr.c:2141 ext4_xattr_block_set+0x2ef2/0x3680
RIP: 0010:ext4_xattr_block_set+0x2ef2/0x3680 fs/ext4/xattr.c:2141
Call Trace:
ext4_xattr_set_handle+0xcd4/0x15c0 fs/ext4/xattr.c:2458
ext4_initxattrs+0xa3/0x110 fs/ext4/xattr_security.c:44
security_inode_init_security+0x2df/0x3f0 security/security.c:1147
__ext4_new_inode+0x347e/0x43d0 fs/ext4/ialloc.c:1324
ext4_mkdir+0x425/0xce0 fs/ext4/namei.c:2992
vfs_mkdir+0x29d/0x450 fs/namei.c:4038
do_mkdirat+0x264/0x520 fs/namei.c:4061
__do_sys_mkdirat fs/namei.c:4076 [inline]
__se_sys_mkdirat fs/namei.c:4074 [inline]
__x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4074
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230506142419.984260-1-tytso@mit.edu
Reported-by: syzbot+6385d7d3065524c5ca6d@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=6513f6cb5cd6b5fc9f37e3bb70d273b94be9c34c
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Ext4 has a filesystem wide lock protecting ext4_writepages() calls to
avoid races with switching of journalled data flag or inode format. This
lock can however cause a deadlock like:
CPU0 CPU1
ext4_writepages()
percpu_down_read(sbi->s_writepages_rwsem);
ext4_change_inode_journal_flag()
percpu_down_write(sbi->s_writepages_rwsem);
- blocks, all readers block from now on
ext4_do_writepages()
ext4_init_io_end()
kmem_cache_zalloc(io_end_cachep, GFP_KERNEL)
fs_reclaim frees dentry...
dentry_unlink_inode()
iput() - last ref =>
iput_final() - inode dirty =>
write_inode_now()...
ext4_writepages() tries to acquire sbi->s_writepages_rwsem
and blocks forever
Make sure we cannot recurse into filesystem reclaim from writeback code
to avoid the deadlock.
Reported-by: syzbot+6898da502aef574c5f8a@syzkaller.appspotmail.com
Link: https://lore.kernel.org/all/0000000000004c66b405fa108e27@google.com
Fixes: c8585c6fca ("ext4: fix races between changing inode journal mode and ext4_writepages")
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230504124723.20205-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Previously, ext4_get_group_info() would treat an invalid group number
as BUG(), since in theory it should never happen. However, if a
malicious attaker (or fuzzer) modifies the superblock via the block
device while it is the file system is mounted, it is possible for
s_first_data_block to get set to a very large number. In that case,
when calculating the block group of some block number (such as the
starting block of a preallocation region), could result in an
underflow and very large block group number. Then the BUG_ON check in
ext4_get_group_info() would fire, resutling in a denial of service
attack that can be triggered by root or someone with write access to
the block device.
For a quality of implementation perspective, it's best that even if
the system administrator does something that they shouldn't, that it
will not trigger a BUG. So instead of BUG'ing, ext4_get_group_info()
will call ext4_error and return NULL. We also add fallback code in
all of the callers of ext4_get_group_info() that it might NULL.
Also, since ext4_get_group_info() was already borderline to be an
inline function, un-inline it. The results in a next reduction of the
compiled text size of ext4 by roughly 2k.
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230430154311.579720-2-tytso@mit.edu
Reported-by: syzbot+e2efa3efc15a1c9e95c3@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=69b28112e098b070f639efb356393af3ffec4220
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Pull more btrfs fixes from David Sterba:
- fix incorrect number of bitmap entries for space cache if loading is
interrupted by some error
- fix backref walking, this breaks a mode of LOGICAL_INO_V2 ioctl that
is used in deduplication tools
- zoned mode fixes:
- properly finish zone reserved for relocation
- correctly calculate super block zone end on ZNS
- properly initialize new extent buffer for redirty
- make mount option clear_cache work with block-group-tree, to rebuild
free-space-tree instead of temporarily disabling it that would lead
to a forced read-only mount
- fix alignment check for offset when printing extent item
* tag 'for-6.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: make clear_cache mount option to rebuild FST without disabling it
btrfs: zero the buffer before marking it dirty in btrfs_redirty_list_add
btrfs: zoned: fix full zone super block reading on ZNS
btrfs: zoned: zone finish data relocation BG with last IO
btrfs: fix backref walking not returning all inode refs
btrfs: fix space cache inconsistency after error loading it from disk
btrfs: print-tree: parent bytenr must be aligned to sector size
Pull cifs client fixes from Steve French:
- fix for copy_file_range bug for very large files that are multiples
of rsize
- do not ignore "isolated transport" flag if set on share
- set rasize default better
- three fixes related to shutdown and freezing (fixes 4 xfstests, and
closes deferred handles faster in some places that were missed)
* tag '6.4-rc1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: release leases for deferred close handles when freezing
smb3: fix problem remounting a share after shutdown
SMB3: force unmount was failing to close deferred close files
smb3: improve parallel reads of large files
do not reuse connection if share marked as isolated
cifs: fix pcchunk length type in smb2_copychunk_range
Pull vfs fix from Christian Brauner:
"During the pipe nonblock rework the check for both O_NONBLOCK and
IOCB_NOWAIT was dropped. Both checks need to be performed to ensure
that files without O_NONBLOCK but IOCB_NOWAIT don't block when writing
to or reading from a pipe.
This just contains the fix adding the check for IOCB_NOWAIT back in"
* tag 'vfs/v6.4-rc1/pipe' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs:
pipe: check for IOCB_NOWAIT alongside O_NONBLOCK
Pipe reads or writes need to enable nonblocking attempts, if either
O_NONBLOCK is set on the file, or IOCB_NOWAIT is set in the iocb being
passed in. The latter isn't currently true, ensure we check for both
before waiting on data or space.
Fixes: afed6271f5 ("pipe: set FMODE_NOWAIT on pipes")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Message-Id: <e5946d67-4e5e-b056-ba80-656bab12d9f6@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Pull xfs bug fixes from Dave Chinner:
"Largely minor bug fixes and cleanups, th emost important of which are
probably the fixes for regressions in the extent allocation code:
- fixes for inode garbage collection shutdown racing with work queue
updates
- ensure inodegc workers run on the CPU they are supposed to
- disable counter scrubbing until we can exclusively freeze the
filesystem from the kernel
- regression fixes for new allocation related bugs
- a couple of minor cleanups"
* tag 'xfs-6.4-rc1-fixes' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: fix xfs_inodegc_stop racing with mod_delayed_work
xfs: disable reaping in fscounters scrub
xfs: check that per-cpu inodegc workers actually run on that cpu
xfs: explicitly specify cpu when forcing inodegc delayed work to run immediately
xfs: fix negative array access in xfs_getbmap
xfs: don't allocate into the data fork for an unshare request
xfs: flush dirty data and drain directios before scrubbing cow fork
xfs: set bnobt/cntbt numrecs correctly when formatting new AGs
xfs: don't unconditionally null args->pag in xfs_bmap_btalloc_at_eof
We should not be caching closed files when freeze is invoked on an fs
(so we can release resources more gracefully).
Fixes xfstests generic/068 generic/390 generic/491
Reviewed-by: David Howells <dhowells@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Pull inotify fix from Jan Kara:
"A fix for possibly reporting invalid watch descriptor with inotify
event"
* tag 'fsnotify_for_v6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
inotify: Avoid reporting event with invalid wd
Pull gfs2 fix from Andreas Gruenbacher:
- Fix a NULL pointer dereference when mounting corrupted filesystems
* tag 'gfs2-v6.3-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
gfs2: Don't deref jdesc in evict
On corrupt gfs2 file systems the evict code can try to reference the
journal descriptor structure, jdesc, after it has been freed and set to
NULL. The sequence of events is:
init_journal()
...
fail_jindex:
gfs2_jindex_free(sdp); <------frees journals, sets jdesc = NULL
if (gfs2_holder_initialized(&ji_gh))
gfs2_glock_dq_uninit(&ji_gh);
fail:
iput(sdp->sd_jindex); <--references jdesc in evict_linked_inode
evict()
gfs2_evict_inode()
evict_linked_inode()
ret = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
<------references the now freed/zeroed sd_jdesc pointer.
The call to gfs2_trans_begin is done because the truncate_inode_pages
call can cause gfs2 events that require a transaction, such as removing
journaled data (jdata) blocks from the journal.
This patch fixes the problem by adding a check for sdp->sd_jdesc to
function gfs2_evict_inode. In theory, this should only happen to corrupt
gfs2 file systems, when gfs2 detects the problem, reports it, then tries
to evict all the system inodes it has read in up to that point.
Reported-by: Yang Lan <lanyang0908@gmail.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Previously clear_cache mount option would simply disable free-space-tree
feature temporarily then re-enable it to rebuild the whole free space
tree.
But this is problematic for block-group-tree feature, as we have an
artificial dependency on free-space-tree feature.
If we go the existing method, after clearing the free-space-tree
feature, we would flip the filesystem to read-only mode, as we detect a
super block write with block-group-tree but no free-space-tree feature.
This patch would change the behavior by properly rebuilding the free
space tree without disabling this feature, thus allowing clear_cache
mount option to work with block group tree.
Now we can mount a filesystem with block-group-tree feature and
clear_mount option:
$ mkfs.btrfs -O block-group-tree /dev/test/scratch1 -f
$ sudo mount /dev/test/scratch1 /mnt/btrfs -o clear_cache
$ sudo dmesg -t | head -n 5
BTRFS info (device dm-1): force clearing of disk cache
BTRFS info (device dm-1): using free space tree
BTRFS info (device dm-1): auto enabling async discard
BTRFS info (device dm-1): rebuilding free space tree
BTRFS info (device dm-1): checking UUID tree
CC: stable@vger.kernel.org # 6.1+
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
btrfs_redirty_list_add zeroes the buffer data and sets the
EXTENT_BUFFER_NO_CHECK to make sure writeback is fine with a bogus
header. But it does that after already marking the buffer dirty, which
means that writeback could already be looking at the buffer.
Switch the order of operations around so that the buffer is only marked
dirty when we're ready to write it.
Fixes: d3575156f6 ("btrfs: zoned: redirty released extent buffers")
CC: stable@vger.kernel.org # 5.15+
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
