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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are some small driver core and kernfs fixes for some reported
problems. They include:
- kernfs regression that is causing oopses in 5.17 and newer releases
- topology sysfs fixes for a few small reported problems.
All of these have been in linux-next for a while with no reported
issues"
* tag 'driver-core-5.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
kernfs: fix NULL dereferencing in kernfs_remove
topology: Fix up build warning in topology_is_visible()
arch_topology: Do not set llc_sibling if llc_id is invalid
topology: make core_mask include at least cluster_siblings
topology/sysfs: Hide PPIN on systems that do not support it.
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kernfs_remove supported NULL kernfs_node param to bail out but revent
per-fs lock change introduced regression that dereferencing the
param without NULL check so kernel goes crash.
This patch checks the NULL kernfs_node in kernfs_remove and if so,
just return.
Quote from bug report by Jirka
```
The bug is triggered by running NAS Parallel benchmark suite on
SuperMicro servers with 2x Xeon(R) Gold 6126 CPU. Here is the error
log:
[ 247.035564] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 247.036009] #PF: supervisor read access in kernel mode
[ 247.036009] #PF: error_code(0x0000) - not-present page
[ 247.036009] PGD 0 P4D 0
[ 247.036009] Oops: 0000 [#1] PREEMPT SMP PTI
[ 247.058060] CPU: 1 PID: 6546 Comm: umount Not tainted
5.16.0393c3714081a53795bbff0e985d24146def6f57f+ #16
[ 247.058060] Hardware name: Supermicro Super Server/X11DDW-L, BIOS
2.0b 03/07/2018
[ 247.058060] RIP: 0010:kernfs_remove+0x8/0x50
[ 247.058060] Code: 4c 89 e0 5b 5d 41 5c 41 5d 41 5e c3 49 c7 c4 f4
ff ff ff eb b2 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1f 44 00 00
41 54 55 <48> 8b 47 08 48 89 fd 48 85 c0 48 0f 44 c7 4c 8b 60 50 49 83
c4 60
[ 247.058060] RSP: 0018:ffffbbfa48a27e48 EFLAGS: 00010246
[ 247.058060] RAX: 0000000000000001 RBX: ffffffff89e31f98 RCX: 0000000080200018
[ 247.058060] RDX: 0000000080200019 RSI: fffff6760786c900 RDI: 0000000000000000
[ 247.058060] RBP: ffffffff89e31f98 R08: ffff926b61b24d00 R09: 0000000080200018
[ 247.122048] R10: ffff926b61b24d00 R11: ffff926a8040c000 R12: ffff927bd09a2000
[ 247.122048] R13: ffffffff89e31fa0 R14: dead000000000122 R15: dead000000000100
[ 247.122048] FS: 00007f01be0a8c40(0000) GS:ffff926fa8e40000(0000)
knlGS:0000000000000000
[ 247.122048] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 247.122048] CR2: 0000000000000008 CR3: 00000001145c6003 CR4: 00000000007706e0
[ 247.122048] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 247.122048] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 247.122048] PKRU: 55555554
[ 247.122048] Call Trace:
[ 247.122048] <TASK>
[ 247.122048] rdt_kill_sb+0x29d/0x350
[ 247.122048] deactivate_locked_super+0x36/0xa0
[ 247.122048] cleanup_mnt+0x131/0x190
[ 247.122048] task_work_run+0x5c/0x90
[ 247.122048] exit_to_user_mode_prepare+0x229/0x230
[ 247.122048] syscall_exit_to_user_mode+0x18/0x40
[ 247.122048] do_syscall_64+0x48/0x90
[ 247.122048] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 247.122048] RIP: 0033:0x7f01be2d735b
```
Link: https://bugzilla.kernel.org/show_bug.cgi?id=215696
Link: https://lore.kernel.org/lkml/CAE4VaGDZr_4wzRn2___eDYRtmdPaGGJdzu_LCSkJYuY9BEO3cw@mail.gmail.com/
Fixes: 393c3714081a (kernfs: switch global kernfs_rwsem lock to per-fs lock)
Cc: stable@vger.kernel.org
Reported-by: Jirka Hladky <jhladky@redhat.com>
Tested-by: Jirka Hladky <jhladky@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Minchan Kim <minchan@kernel.org>
Link: https://lore.kernel.org/r/20220427172152.3505364-1-minchan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pull io_uring fixes from Jens Axboe:
"Pretty boring:
- three patches just adding reserved field checks (me, Eugene)
- Fixing a potential regression with IOPOLL caused by a block change
(Joseph)"
Boring is good.
* tag 'io_uring-5.18-2022-04-29' of git://git.kernel.dk/linux-block:
io_uring: check that data field is 0 in ringfd unregister
io_uring: fix uninitialized field in rw io_kiocb
io_uring: check reserved fields for recv/recvmsg
io_uring: check reserved fields for send/sendmsg
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Only allow data field to be 0 in struct io_uring_rsrc_update user
arguments to allow for future possible usage.
Fixes: e7a6c00dc77a ("io_uring: add support for registering ring file descriptors")
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
Link: https://lore.kernel.org/r/20220429142218.GA28696@asgard.redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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io_rw_init_file does not initialize kiocb->private, so when iocb_bio_iopoll
reads kiocb->private it can contain uninitialized data.
Fixes: 3e08773c3841 ("block: switch polling to be bio based")
Signed-off-by: Joseph Ravichandran <jravi@mit.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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We should check unused fields for non-zero and -EINVAL if they are set,
making it consistent with other opcodes.
Fixes: aa1fa28fc73e ("io_uring: add support for recvmsg()")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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We should check unused fields for non-zero and -EINVAL if they are set,
making it consistent with other opcodes.
Fixes: 0fa03c624d8f ("io_uring: add support for sendmsg()")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Pull ceph client fixes from Ilya Dryomov:
"A fix for a NULL dereference that turns out to be easily triggerable
by fsync (marked for stable) and a false positive WARN and snap_rwsem
locking fixups"
* tag 'ceph-for-5.18-rc5' of https://github.com/ceph/ceph-client:
ceph: fix possible NULL pointer dereference for req->r_session
ceph: remove incorrect session state check
ceph: get snap_rwsem read lock in handle_cap_export for ceph_add_cap
libceph: disambiguate cluster/pool full log message
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The request will be inserted into the ci->i_unsafe_dirops before
assigning the req->r_session, so it's possible that we will hit
NULL pointer dereference bug here.
Cc: stable@vger.kernel.org
URL: https://tracker.ceph.com/issues/55327
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Tested-by: Aaron Tomlin <atomlin@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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Once the session is opened the s->s_ttl will be set, and when receiving
a new mdsmap and the MDS map is changed, it will be possibly will close
some sessions and open new ones. And then some sessions will be in
CLOSING state evening without unmounting.
URL: https://tracker.ceph.com/issues/54979
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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ceph_add_cap says in its function documentation that the caller should
hold the read lock on the session snap_rwsem. Furthermore, not only
ceph_add_cap needs that lock, when it calls to ceph_lookup_snap_realm it
eventually calls ceph_get_snap_realm which states via lockdep that
snap_rwsem needs to be held. handle_cap_export calls ceph_add_cap
without that mdsc->snap_rwsem held. Thus, since ceph_get_snap_realm
and ceph_add_cap both need the lock, the common place to acquire that
lock is inside handle_cap_export.
Signed-off-by: Niels Dossche <dossche.niels@gmail.com>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull gfs2 fix from Andreas Gruenbacher:
- No short reads or writes upon glock contention
* tag 'gfs2-v5.18-rc4-fix2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
gfs2: No short reads or writes upon glock contention
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Commit 00bfe02f4796 ("gfs2: Fix mmap + page fault deadlocks for buffered
I/O") changed gfs2_file_read_iter() and gfs2_file_buffered_write() to
allow dropping the inode glock while faulting in user buffers. When the
lock was dropped, a short result was returned to indicate that the
operation was interrupted.
As pointed out by Linus (see the link below), this behavior is broken
and the operations should always re-acquire the inode glock and resume
the operation instead.
Link: https://lore.kernel.org/lkml/CAHk-=whaz-g_nOOoo8RRiWNjnv2R+h6_xk2F1J4TuSRxk1MtLw@mail.gmail.com/
Fixes: 00bfe02f4796 ("gfs2: Fix mmap + page fault deadlocks for buffered I/O")
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
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Pull xfs fixes from Dave Chinner:
- define buffer bit flags as unsigned to fix gcc-5 + c11 warnings
- remove redundant XFS fields from MAINTAINERS
- fix inode buffer locking order regression
* tag 'xfs-5.18-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: reorder iunlink remove operation in xfs_ifree
MAINTAINERS: update IOMAP FILESYSTEM LIBRARY and XFS FILESYSTEM
xfs: convert buffer flags to unsigned.
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The O_TMPFILE creation implementation creates a specific order of
operations for inode allocation/freeing and unlinked list
modification. Currently both are serialised by the AGI, so the order
doesn't strictly matter as long as the are both in the same
transaction.
However, if we want to move the unlinked list insertions largely out
from under the AGI lock, then we have to be concerned about the
order in which we do unlinked list modification operations.
O_TMPFILE creation tells us this order is inode allocation/free,
then unlinked list modification.
Change xfs_ifree() to use this same ordering on unlinked list
removal. This way we always guarantee that when we enter the
iunlinked list removal code from this path, we already have the AGI
locked and we don't have to worry about lock nesting AGI reads
inside unlink list locks because it's already locked and attached to
the transaction.
We can do this safely as the inode freeing and unlinked list removal
are done in the same transaction and hence are atomic operations
with respect to log recovery.
Reported-by: Frank Hofmann <fhofmann@cloudflare.com>
Fixes: 298f7bec503f ("xfs: pin inode backing buffer to the inode log item")
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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5.18 w/ std=gnu11 compiled with gcc-5 wants flags stored in unsigned
fields to be unsigned. This manifests as a compiler error such as:
/kisskb/src/fs/xfs/./xfs_trace.h:432:2: note: in expansion of macro 'TP_printk'
TP_printk("dev %d:%d daddr 0x%llx bbcount 0x%x hold %d pincount %d "
^
/kisskb/src/fs/xfs/./xfs_trace.h:440:5: note: in expansion of macro '__print_flags'
__print_flags(__entry->flags, "|", XFS_BUF_FLAGS),
^
/kisskb/src/fs/xfs/xfs_buf.h:67:4: note: in expansion of macro 'XBF_UNMAPPED'
{ XBF_UNMAPPED, "UNMAPPED" }
^
/kisskb/src/fs/xfs/./xfs_trace.h:440:40: note: in expansion of macro 'XFS_BUF_FLAGS'
__print_flags(__entry->flags, "|", XFS_BUF_FLAGS),
^
/kisskb/src/fs/xfs/./xfs_trace.h: In function 'trace_raw_output_xfs_buf_flags_class':
/kisskb/src/fs/xfs/xfs_buf.h:46:23: error: initializer element is not constant
#define XBF_UNMAPPED (1 << 31)/* do not map the buffer */
as __print_flags assigns XFS_BUF_FLAGS to a structure that uses an
unsigned long for the flag. Since this results in the value of
XBF_UNMAPPED causing a signed integer overflow, the result is
technically undefined behavior, which gcc-5 does not accept as an
integer constant.
This is based on a patch from Arnd Bergman <arnd@arndb.de>.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Chandan Babu R <chandan.babu@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs
Pull zonefs fixes from Damien Le Moal:
"Two fixes for rc5:
- Fix inode initialization to make sure that the inode flags are all
cleared.
- Use zone reset operation instead of close to make sure that the
zone of an empty sequential file in never in an active state after
closing the file"
* tag 'zonefs-5.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs:
zonefs: Fix management of open zones
zonefs: Clear inode information flags on inode creation
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The mount option "explicit_open" manages the device open zone
resources to ensure that if an application opens a sequential file for
writing, the file zone can always be written by explicitly opening
the zone and accounting for that state with the s_open_zones counter.
However, if some zones are already open when mounting, the device open
zone resource usage status will be larger than the initial s_open_zones
value of 0. Ensure that this inconsistency does not happen by closing
any sequential zone that is open when mounting.
Furthermore, with ZNS drives, closing an explicitly open zone that has
not been written will change the zone state to "closed", that is, the
zone will remain in an active state. Since this can then cause failures
of explicit open operations on other zones if the drive active zone
resources are exceeded, we need to make sure that the zone is not
active anymore by resetting it instead of closing it. To address this,
zonefs_zone_mgmt() is modified to change a REQ_OP_ZONE_CLOSE request
into a REQ_OP_ZONE_RESET for sequential zones that have not been
written.
Fixes: b5c00e975779 ("zonefs: open/close zone on file open/close")
Cc: <stable@vger.kernel.org>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
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Ensure that the i_flags field of struct zonefs_inode_info is cleared to
0 when initializing a zone file inode, avoiding seeing the flag
ZONEFS_ZONE_OPEN being incorrectly set.
Fixes: b5c00e975779 ("zonefs: open/close zone on file open/close")
Cc: <stable@vger.kernel.org>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull gfs2 fix from Andreas Gruenbacher:
- Only re-check for direct I/O writes past the end of the file after
re-acquiring the inode glock.
* tag 'gfs2-v5.18-rc4-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
gfs2: Don't re-check for write past EOF unnecessarily
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Only re-check for direct I/O writes past the end of the file after
re-acquiring the inode glock.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
- direct IO fixes:
- restore passing file offset to correctly calculate checksums
when repairing on read and bio split happens
- use correct bio when sumitting IO on zoned filesystem
- zoned mode fixes:
- fix selection of device to correctly calculate device
capabilities when allocating a new bio
- use a dedicated lock for exclusion during relocation
- fix leaked plug after failure syncing log
- fix assertion during scrub and relocation
* tag 'for-5.18-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: zoned: use dedicated lock for data relocation
btrfs: fix assertion failure during scrub due to block group reallocation
btrfs: fix direct I/O writes for split bios on zoned devices
btrfs: fix direct I/O read repair for split bios
btrfs: fix and document the zoned device choice in alloc_new_bio
btrfs: fix leaked plug after failure syncing log on zoned filesystems
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Currently, we use btrfs_inode_{lock,unlock}() to grant an exclusive
writeback of the relocation data inode in
btrfs_zoned_data_reloc_{lock,unlock}(). However, that can cause a deadlock
in the following path.
Thread A takes btrfs_inode_lock() and waits for metadata reservation by
e.g, waiting for writeback:
prealloc_file_extent_cluster()
- btrfs_inode_lock(&inode->vfs_inode, 0);
- btrfs_prealloc_file_range()
...
- btrfs_replace_file_extents()
- btrfs_start_transaction
...
- btrfs_reserve_metadata_bytes()
Thread B (e.g, doing a writeback work) needs to wait for the inode lock to
continue writeback process:
do_writepages
- btrfs_writepages
- extent_writpages
- btrfs_zoned_data_reloc_lock(BTRFS_I(inode));
- btrfs_inode_lock()
The deadlock is caused by relying on the vfs_inode's lock. By using it, we
introduced unnecessary exclusion of writeback and
btrfs_prealloc_file_range(). Also, the lock at this point is useless as we
don't have any dirty pages in the inode yet.
Introduce fs_info->zoned_data_reloc_io_lock and use it for the exclusive
writeback.
Fixes: 35156d852762 ("btrfs: zoned: only allow one process to add pages to a relocation inode")
CC: stable@vger.kernel.org # 5.16.x: 869f4cdc73f9: btrfs: zoned: encapsulate inode locking for zoned relocation
CC: stable@vger.kernel.org # 5.16.x
CC: stable@vger.kernel.org # 5.17
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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During a scrub, or device replace, we can race with block group removal
and allocation and trigger the following assertion failure:
[7526.385524] assertion failed: cache->start == chunk_offset, in fs/btrfs/scrub.c:3817
[7526.387351] ------------[ cut here ]------------
[7526.387373] kernel BUG at fs/btrfs/ctree.h:3599!
[7526.388001] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC PTI
[7526.388970] CPU: 2 PID: 1158150 Comm: btrfs Not tainted 5.17.0-rc8-btrfs-next-114 #4
[7526.390279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[7526.392430] RIP: 0010:assertfail.constprop.0+0x18/0x1a [btrfs]
[7526.393520] Code: f3 48 c7 c7 20 (...)
[7526.396926] RSP: 0018:ffffb9154176bc40 EFLAGS: 00010246
[7526.397690] RAX: 0000000000000048 RBX: ffffa0db8a910000 RCX: 0000000000000000
[7526.398732] RDX: 0000000000000000 RSI: ffffffff9d7239a2 RDI: 00000000ffffffff
[7526.399766] RBP: ffffa0db8a911e10 R08: ffffffffa71a3ca0 R09: 0000000000000001
[7526.400793] R10: 0000000000000001 R11: 0000000000000000 R12: ffffa0db4b170800
[7526.401839] R13: 00000003494b0000 R14: ffffa0db7c55b488 R15: ffffa0db8b19a000
[7526.402874] FS: 00007f6c99c40640(0000) GS:ffffa0de6d200000(0000) knlGS:0000000000000000
[7526.404038] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[7526.405040] CR2: 00007f31b0882160 CR3: 000000014b38c004 CR4: 0000000000370ee0
[7526.406112] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[7526.407148] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[7526.408169] Call Trace:
[7526.408529] <TASK>
[7526.408839] scrub_enumerate_chunks.cold+0x11/0x79 [btrfs]
[7526.409690] ? do_wait_intr_irq+0xb0/0xb0
[7526.410276] btrfs_scrub_dev+0x226/0x620 [btrfs]
[7526.410995] ? preempt_count_add+0x49/0xa0
[7526.411592] btrfs_ioctl+0x1ab5/0x36d0 [btrfs]
[7526.412278] ? __fget_files+0xc9/0x1b0
[7526.412825] ? kvm_sched_clock_read+0x14/0x40
[7526.413459] ? lock_release+0x155/0x4a0
[7526.414022] ? __x64_sys_ioctl+0x83/0xb0
[7526.414601] __x64_sys_ioctl+0x83/0xb0
[7526.415150] do_syscall_64+0x3b/0xc0
[7526.415675] entry_SYSCALL_64_after_hwframe+0x44/0xae
[7526.416408] RIP: 0033:0x7f6c99d34397
[7526.416931] Code: 3c 1c e8 1c ff (...)
[7526.419641] RSP: 002b:00007f6c99c3fca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[7526.420735] RAX: ffffffffffffffda RBX: 00005624e1e007b0 RCX: 00007f6c99d34397
[7526.421779] RDX: 00005624e1e007b0 RSI: 00000000c400941b RDI: 0000000000000003
[7526.422820] RBP: 0000000000000000 R08: 00007f6c99c40640 R09: 0000000000000000
[7526.423906] R10: 00007f6c99c40640 R11: 0000000000000246 R12: 00007fff746755de
[7526.424924] R13: 00007fff746755df R14: 0000000000000000 R15: 00007f6c99c40640
[7526.425950] </TASK>
That assertion is relatively new, introduced with commit d04fbe19aefd2
("btrfs: scrub: cleanup the argument list of scrub_chunk()").
The block group we get at scrub_enumerate_chunks() can actually have a
start address that is smaller then the chunk offset we extracted from a
device extent item we got from the commit root of the device tree.
This is very rare, but it can happen due to a race with block group
removal and allocation. For example, the following steps show how this
can happen:
1) We are at transaction T, and we have the following blocks groups,
sorted by their logical start address:
[ bg A, start address A, length 1G (data) ]
[ bg B, start address B, length 1G (data) ]
(...)
[ bg W, start address W, length 1G (data) ]
--> logical address space hole of 256M,
there used to be a 256M metadata block group here
[ bg Y, start address Y, length 256M (metadata) ]
--> Y matches W's end offset + 256M
Block group Y is the block group with the highest logical address in
the whole filesystem;
2) Block group Y is deleted and its extent mapping is removed by the call
to remove_extent_mapping() made from btrfs_remove_block_group().
So after this point, the last element of the mapping red black tree,
its rightmost node, is the mapping for block group W;
3) While still at transaction T, a new data block group is allocated,
with a length of 1G. When creating the block group we do a call to
find_next_chunk(), which returns the logical start address for the
new block group. This calls returns X, which corresponds to the
end offset of the last block group, the rightmost node in the mapping
red black tree (fs_info->mapping_tree), plus one.
So we get a new block group that starts at logical address X and with
a length of 1G. It spans over the whole logical range of the old block
group Y, that was previously removed in the same transaction.
However the device extent allocated to block group X is not the same
device extent that was used by block group Y, and it also does not
overlap that extent, which must be always the case because we allocate
extents by searching through the commit root of the device tree
(otherwise it could corrupt a filesystem after a power failure or
an unclean shutdown in general), so the extent allocator is behaving
as expected;
4) We have a task running scrub, currently at scrub_enumerate_chunks().
There it searches for device extent items in the device tree, using
its commit root. It finds a device extent item that was used by
block group Y, and it extracts the value Y from that item into the
local variable 'chunk_offset', using btrfs_dev_extent_chunk_offset();
It then calls btrfs_lookup_block_group() to find block group for
the logical address Y - since there's currently no block group that
starts at that logical address, it returns block group X, because
its range contains Y.
This results in triggering the assertion:
ASSERT(cache->start == chunk_offset);
right before calling scrub_chunk(), as cache->start is X and
chunk_offset is Y.
This is more likely to happen of filesystems not larger than 50G, because
for these filesystems we use a 256M size for metadata block groups and
a 1G size for data block groups, while for filesystems larger than 50G,
we use a 1G size for both data and metadata block groups (except for
zoned filesystems). It could also happen on any filesystem size due to
the fact that system block groups are always smaller (32M) than both
data and metadata block groups, but these are not frequently deleted, so
much less likely to trigger the race.
So make scrub skip any block group with a start offset that is less than
the value we expect, as that means it's a new block group that was created
in the current transaction. It's pointless to continue and try to scrub
its extents, because scrub searches for extents using the commit root, so
it won't find any. For a device replace, skip it as well for the same
reasons, and we don't need to worry about the possibility of extents of
the new block group not being to the new device, because we have the write
duplication setup done through btrfs_map_block().
Fixes: d04fbe19aefd ("btrfs: scrub: cleanup the argument list of scrub_chunk()")
CC: stable@vger.kernel.org # 5.17
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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When a bio is split in btrfs_submit_direct, dip->file_offset contains
the file offset for the first bio. But this means the start value used
in btrfs_end_dio_bio to record the write location for zone devices is
incorrect for subsequent bios.
CC: stable@vger.kernel.org # 5.16+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>
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When a bio is split in btrfs_submit_direct, dip->file_offset contains
the file offset for the first bio. But this means the start value used
in btrfs_check_read_dio_bio is incorrect for subsequent bios. Add
a file_offset field to struct btrfs_bio to pass along the correct offset.
Given that check_data_csum only uses start of an error message this
means problems with this miscalculation will only show up when I/O fails
or checksums mismatch.
The logic was removed in f4f39fc5dc30 ("btrfs: remove btrfs_bio::logical
member") but we need it due to the bio splitting.
CC: stable@vger.kernel.org # 5.16+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>
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Zone Append bios only need a valid block device in struct bio, but
not the device in the btrfs_bio. Use the information from
btrfs_zoned_get_device to set up bi_bdev and fix zoned writes on
multi-device file system with non-homogeneous capabilities and remove
the pointless btrfs_bio.device assignment.
Add big fat comments explaining what is going on here.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>
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On a zoned filesystem, if we fail to allocate the root node for the log
root tree while syncing the log, we end up returning without finishing
the IO plug we started before, resulting in leaking resources as we
have started writeback for extent buffers of a log tree before. That
allocation failure, which typically is either -ENOMEM or -ENOSPC, is not
fatal and the fsync can safely fallback to a full transaction commit.
So release the IO plug if we fail to allocate the extent buffer for the
root of the log root tree when syncing the log on a zoned filesystem.
Fixes: 3ddebf27fcd3a9 ("btrfs: zoned: reorder log node allocation on zoned filesystem")
CC: stable@vger.kernel.org # 5.15+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs fixes from Jaegeuk Kim:
"This includes major bug fixes introduced in 5.18-rc1 and 5.17+:
- Remove obsolete whint_mode (5.18-rc1)
- Fix IO split issue caused by op_flags change in f2fs (5.18-rc1)
- Fix a wrong condition check to detect IO failure loop (5.18-rc1)
- Fix wrong data truncation during roll-forward (5.17+)"
* tag 'f2fs-fix-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
f2fs: should not truncate blocks during roll-forward recovery
f2fs: fix wrong condition check when failing metapage read
f2fs: keep io_flags to avoid IO split due to different op_flags in two fio holders
f2fs: remove obsolete whint_mode
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If the file preallocated blocks and fsync'ed, we should not truncate them during
roll-forward recovery which will recover i_size correctly back.
Fixes: d4dd19ec1ea0 ("f2fs: do not expose unwritten blocks to user by DIO")
Cc: <stable@vger.kernel.org> # 5.17+
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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This patch fixes wrong initialization.
Fixes: 50c63009f6ab ("f2fs: avoid an infinite loop in f2fs_sync_dirty_inodes")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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holders
Let's attach io_flags to bio only, so that we can merge IOs given original
io_flags only.
Fixes: 64bf0eef0171 ("f2fs: pass the bio operation to bio_alloc_bioset")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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This patch removes obsolete whint_mode.
Fixes: 41d36a9f3e53 ("fs: remove kiocb.ki_hint")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Pull ksmbd server fixes from Steve French:
- cap maximum sector size reported to avoid mount problems
- reference count fix
- fix filename rename race
* tag '5.18-rc3-ksmbd-fixes' of git://git.samba.org/ksmbd:
ksmbd: set fixed sector size to FS_SECTOR_SIZE_INFORMATION
ksmbd: increment reference count of parent fp
ksmbd: remove filename in ksmbd_file
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Currently ksmbd is using ->f_bsize from vfs_statfs() as sector size.
If fat/exfat is a local share, ->f_bsize is a cluster size that is too
large to be used as a sector size. Sector sizes larger than 4K cause
problem occurs when mounting an iso file through windows client.
The error message can be obtained using Mount-DiskImage command,
the error is:
"Mount-DiskImage : The sector size of the physical disk on which the
virtual disk resides is not supported."
This patch reports fixed 4KB sector size if ->s_blocksize is bigger
than 4KB.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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Add missing increment reference count of parent fp in
ksmbd_lookup_fd_inode().
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
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If the filename is change by underlying rename the server, fp->filename
and real filename can be different. This patch remove the uses of
fp->filename in ksmbd and replace it with d_path().
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
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Pull io_uring fixes from Jens Axboe:
"Just two small fixes - one fixing a potential leak for the iovec for
larger requests added in this cycle, and one fixing a theoretical leak
with CQE_SKIP and IOPOLL"
* tag 'io_uring-5.18-2022-04-22' of git://git.kernel.dk/linux-block:
io_uring: fix leaks on IOPOLL and CQE_SKIP
io_uring: free iovec if file assignment fails
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If all completed requests in io_do_iopoll() were marked with
REQ_F_CQE_SKIP, we'll not only skip CQE posting but also
io_free_batch_list() leaking memory and resources.
Move @nr_events increment before REQ_F_CQE_SKIP check. We'll potentially
return the value greater than the real one, but iopolling will deal with
it and the userspace will re-iopoll if needed. In anyway, I don't think
there are many use cases for REQ_F_CQE_SKIP + IOPOLL.
Fixes: 83a13a4181b0e ("io_uring: tweak iopoll CQE_SKIP event counting")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/5072fc8693fbfd595f89e5d4305bfcfd5d2f0a64.1650186611.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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We just return failure in this case, but we need to release the iovec
first. If we're doing IO with more than FAST_IOV segments, then the
iovec is allocated and must be freed.
Reported-by: syzbot+96b43810dfe9c3bb95ed@syzkaller.appspotmail.com
Fixes: 584b0180f0f4 ("io_uring: move read/write file prep state into actual opcode handler")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"Fix some syzbot-detected bugs, as well as other bugs found by I/O
injection testing.
Change ext4's fallocate to consistently drop set[ug]id bits when an
fallocate operation might possibly change the user-visible contents of
a file.
Also, improve handling of potentially invalid values in the the
s_overhead_cluster superblock field to avoid ext4 returning a negative
number of free blocks"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
jbd2: fix a potential race while discarding reserved buffers after an abort
ext4: update the cached overhead value in the superblock
ext4: force overhead calculation if the s_overhead_cluster makes no sense
ext4: fix overhead calculation to account for the reserved gdt blocks
ext4, doc: fix incorrect h_reserved size
ext4: limit length to bitmap_maxbytes - blocksize in punch_hole
ext4: fix use-after-free in ext4_search_dir
ext4: fix bug_on in start_this_handle during umount filesystem
ext4: fix symlink file size not match to file content
ext4: fix fallocate to use file_modified to update permissions consistently
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we got issue as follows:
[ 72.796117] EXT4-fs error (device sda): ext4_journal_check_start:83: comm fallocate: Detected aborted journal
[ 72.826847] EXT4-fs (sda): Remounting filesystem read-only
fallocate: fallocate failed: Read-only file system
[ 74.791830] jbd2_journal_commit_transaction: jh=0xffff9cfefe725d90 bh=0x0000000000000000 end delay
[ 74.793597] ------------[ cut here ]------------
[ 74.794203] kernel BUG at fs/jbd2/transaction.c:2063!
[ 74.794886] invalid opcode: 0000 [#1] PREEMPT SMP PTI
[ 74.795533] CPU: 4 PID: 2260 Comm: jbd2/sda-8 Not tainted 5.17.0-rc8-next-20220315-dirty #150
[ 74.798327] RIP: 0010:__jbd2_journal_unfile_buffer+0x3e/0x60
[ 74.801971] RSP: 0018:ffffa828c24a3cb8 EFLAGS: 00010202
[ 74.802694] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 74.803601] RDX: 0000000000000001 RSI: ffff9cfefe725d90 RDI: ffff9cfefe725d90
[ 74.804554] RBP: ffff9cfefe725d90 R08: 0000000000000000 R09: ffffa828c24a3b20
[ 74.805471] R10: 0000000000000001 R11: 0000000000000001 R12: ffff9cfefe725d90
[ 74.806385] R13: ffff9cfefe725d98 R14: 0000000000000000 R15: ffff9cfe833a4d00
[ 74.807301] FS: 0000000000000000(0000) GS:ffff9d01afb00000(0000) knlGS:0000000000000000
[ 74.808338] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 74.809084] CR2: 00007f2b81bf4000 CR3: 0000000100056000 CR4: 00000000000006e0
[ 74.810047] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 74.810981] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 74.811897] Call Trace:
[ 74.812241] <TASK>
[ 74.812566] __jbd2_journal_refile_buffer+0x12f/0x180
[ 74.813246] jbd2_journal_refile_buffer+0x4c/0xa0
[ 74.813869] jbd2_journal_commit_transaction.cold+0xa1/0x148
[ 74.817550] kjournald2+0xf8/0x3e0
[ 74.819056] kthread+0x153/0x1c0
[ 74.819963] ret_from_fork+0x22/0x30
Above issue may happen as follows:
write truncate kjournald2
generic_perform_write
ext4_write_begin
ext4_walk_page_buffers
do_journal_get_write_access ->add BJ_Reserved list
ext4_journalled_write_end
ext4_walk_page_buffers
write_end_fn
ext4_handle_dirty_metadata
***************JBD2 ABORT**************
jbd2_journal_dirty_metadata
-> return -EROFS, jh in reserved_list
jbd2_journal_commit_transaction
while (commit_transaction->t_reserved_list)
jh = commit_transaction->t_reserved_list;
truncate_pagecache_range
do_invalidatepage
ext4_journalled_invalidatepage
jbd2_journal_invalidatepage
journal_unmap_buffer
__dispose_buffer
__jbd2_journal_unfile_buffer
jbd2_journal_put_journal_head ->put last ref_count
__journal_remove_journal_head
bh->b_private = NULL;
jh->b_bh = NULL;
jbd2_journal_refile_buffer(journal, jh);
bh = jh2bh(jh);
->bh is NULL, later will trigger null-ptr-deref
journal_free_journal_head(jh);
After commit 96f1e0974575, we no longer hold the j_state_lock while
iterating over the list of reserved handles in
jbd2_journal_commit_transaction(). This potentially allows the
journal_head to be freed by journal_unmap_buffer while the commit
codepath is also trying to free the BJ_Reserved buffers. Keeping
j_state_lock held while trying extends hold time of the lock
minimally, and solves this issue.
Fixes: 96f1e0974575("jbd2: avoid long hold times of j_state_lock while committing a transaction")
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220317142137.1821590-1-yebin10@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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If we (re-)calculate the file system overhead amount and it's
different from the on-disk s_overhead_clusters value, update the
on-disk version since this can take potentially quite a while on
bigalloc file systems.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
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If the file system does not use bigalloc, calculating the overhead is
cheap, so force the recalculation of the overhead so we don't have to
trust the precalculated overhead in the superblock.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
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The kernel calculation was underestimating the overhead by not taking
into account the reserved gdt blocks. With this change, the overhead
calculated by the kernel matches the overhead calculation in mke2fs.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
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Syzbot found an issue [1] in ext4_fallocate().
The C reproducer [2] calls fallocate(), passing size 0xffeffeff000ul,
and offset 0x1000000ul, which, when added together exceed the
bitmap_maxbytes for the inode. This triggers a BUG in
ext4_ind_remove_space(). According to the comments in this function
the 'end' parameter needs to be one block after the last block to be
removed. In the case when the BUG is triggered it points to the last
block. Modify the ext4_punch_hole() function and add constraint that
caps the length to satisfy the one before laster block requirement.
LINK: [1] https://syzkaller.appspot.com/bug?id=b80bd9cf348aac724a4f4dff251800106d721331
LINK: [2] https://syzkaller.appspot.com/text?tag=ReproC&x=14ba0238700000
Fixes: a4bb6b64e39a ("ext4: enable "punch hole" functionality")
Reported-by: syzbot+7a806094edd5d07ba029@syzkaller.appspotmail.com
Signed-off-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Link: https://lore.kernel.org/r/20220331200515.153214-1-tadeusz.struk@linaro.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
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We got issue as follows:
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
==================================================================
BUG: KASAN: use-after-free in ext4_search_dir fs/ext4/namei.c:1394 [inline]
BUG: KASAN: use-after-free in search_dirblock fs/ext4/namei.c:1199 [inline]
BUG: KASAN: use-after-free in __ext4_find_entry+0xdca/0x1210 fs/ext4/namei.c:1553
Read of size 1 at addr ffff8881317c3005 by task syz-executor117/2331
CPU: 1 PID: 2331 Comm: syz-executor117 Not tainted 5.10.0+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:83 [inline]
dump_stack+0x144/0x187 lib/dump_stack.c:124
print_address_description+0x7d/0x630 mm/kasan/report.c:387
__kasan_report+0x132/0x190 mm/kasan/report.c:547
kasan_report+0x47/0x60 mm/kasan/report.c:564
ext4_search_dir fs/ext4/namei.c:1394 [inline]
search_dirblock fs/ext4/namei.c:1199 [inline]
__ext4_find_entry+0xdca/0x1210 fs/ext4/namei.c:1553
ext4_lookup_entry fs/ext4/namei.c:1622 [inline]
ext4_lookup+0xb8/0x3a0 fs/ext4/namei.c:1690
__lookup_hash+0xc5/0x190 fs/namei.c:1451
do_rmdir+0x19e/0x310 fs/namei.c:3760
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x445e59
Code: 4d c7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 1b c7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff2277fac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000400280 RCX: 0000000000445e59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000002
R10: 00007fff2277f990 R11: 0000000000000246 R12: 0000000000000000
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
The buggy address belongs to the page:
page:0000000048cd3304 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x1317c3
flags: 0x200000000000000()
raw: 0200000000000000 ffffea0004526588 ffffea0004528088 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8881317c2f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881317c2f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881317c3000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881317c3080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881317c3100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
ext4_search_dir:
...
de = (struct ext4_dir_entry_2 *)search_buf;
dlimit = search_buf + buf_size;
while ((char *) de < dlimit) {
...
if ((char *) de + de->name_len <= dlimit &&
ext4_match(dir, fname, de)) {
...
}
...
de_len = ext4_rec_len_from_disk(de->rec_len, dir->i_sb->s_blocksize);
if (de_len <= 0)
return -1;
offset += de_len;
de = (struct ext4_dir_entry_2 *) ((char *) de + de_len);
}
Assume:
de=0xffff8881317c2fff
dlimit=0x0xffff8881317c3000
If read 'de->name_len' which address is 0xffff8881317c3005, obviously is
out of range, then will trigger use-after-free.
To solve this issue, 'dlimit' must reserve 8 bytes, as we will read
'de->name_len' to judge if '(char *) de + de->name_len' out of range.
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220324064816.1209985-1-yebin10@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
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We got issue as follows:
------------[ cut here ]------------
kernel BUG at fs/jbd2/transaction.c:389!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 9 PID: 131 Comm: kworker/9:1 Not tainted 5.17.0-862.14.0.6.x86_64-00001-g23f87daf7d74-dirty #197
Workqueue: events flush_stashed_error_work
RIP: 0010:start_this_handle+0x41c/0x1160
RSP: 0018:ffff888106b47c20 EFLAGS: 00010202
RAX: ffffed10251b8400 RBX: ffff888128dc204c RCX: ffffffffb52972ac
RDX: 0000000000000200 RSI: 0000000000000004 RDI: ffff888128dc2050
RBP: 0000000000000039 R08: 0000000000000001 R09: ffffed10251b840a
R10: ffff888128dc204f R11: ffffed10251b8409 R12: ffff888116d78000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888128dc2000
FS: 0000000000000000(0000) GS:ffff88839d680000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001620068 CR3: 0000000376c0e000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
jbd2__journal_start+0x38a/0x790
jbd2_journal_start+0x19/0x20
flush_stashed_error_work+0x110/0x2b3
process_one_work+0x688/0x1080
worker_thread+0x8b/0xc50
kthread+0x26f/0x310
ret_from_fork+0x22/0x30
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
Above issue may happen as follows:
umount read procfs error_work
ext4_put_super
flush_work(&sbi->s_error_work);
ext4_mb_seq_groups_show
ext4_mb_load_buddy_gfp
ext4_mb_init_group
ext4_mb_init_cache
ext4_read_block_bitmap_nowait
ext4_validate_block_bitmap
ext4_error
ext4_handle_error
schedule_work(&EXT4_SB(sb)->s_error_work);
ext4_unregister_sysfs(sb);
jbd2_journal_destroy(sbi->s_journal);
journal_kill_thread
journal->j_flags |= JBD2_UNMOUNT;
flush_stashed_error_work
jbd2_journal_start
start_this_handle
BUG_ON(journal->j_flags & JBD2_UNMOUNT);
To solve this issue, we call 'ext4_unregister_sysfs() before flushing
s_error_work in ext4_put_super().
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20220322012419.725457-1-yebin10@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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We got issue as follows:
[home]# fsck.ext4 -fn ram0yb
e2fsck 1.45.6 (20-Mar-2020)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Symlink /p3/d14/d1a/l3d (inode #3494) is invalid.
Clear? no
Entry 'l3d' in /p3/d14/d1a (3383) has an incorrect filetype (was 7, should be 0).
Fix? no
As the symlink file size does not match the file content. If the writeback
of the symlink data block failed, ext4_finish_bio() handles the end of IO.
However this function fails to mark the buffer with BH_write_io_error and
so when unmount does journal checkpoint it cannot detect the writeback
error and will cleanup the journal. Thus we've lost the correct data in the
journal area. To solve this issue, mark the buffer as BH_write_io_error in
ext4_finish_bio().
Cc: stable@kernel.org
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220321144438.201685-1-yebin10@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Since the initial introduction of (posix) fallocate back at the turn of
the century, it has been possible to use this syscall to change the
user-visible contents of files. This can happen by extending the file
size during a preallocation, or through any of the newer modes (punch,
zero, collapse, insert range). Because the call can be used to change
file contents, we should treat it like we do any other modification to a
file -- update the mtime, and drop set[ug]id privileges/capabilities.
The VFS function file_modified() does all this for us if pass it a
locked inode, so let's make fallocate drop permissions correctly.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20220308185043.GA117678@magnolia
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
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