[syzbot] [ocfs2?] possible deadlock in ocfs2_remove_inode (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 619f0b6fad52 Merge tag 'seccomp-v6.13-rc8' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10a027c4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=ca46bfa06efdf147
dashboard link: https://syzkaller.appspot.com/bug?extid=ddde294b94666bb51266
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/82cabf193b6a/disk-619f0b6f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/848d3b4e7a8f/vmlinux-619f0b6f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4c8f2fdc1676/bzImage-619f0b6f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ddde29...@syzkaller.appspotmail.com

======================================================
WARNING: possible circular locking dependency detected
6.13.0-rc7-syzkaller-00043-g619f0b6fad52 #0 Not tainted
------------------------------------------------------
syz.3.1383/16527 is trying to acquire lock:
ffff8880840ec2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
ffff8880840ec2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: ocfs2_remove_inode+0x15c/0x8a0 fs/ocfs2/inode.c:655

but task is already holding lock:
ffff8880840ea640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
ffff8880840ea640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}, at: ocfs2_wipe_inode+0x2e6/0x1220 fs/ocfs2/inode.c:776

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}:
down_write+0x93/0x200 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:818 [inline]
ocfs2_del_inode_from_orphan+0x112/0x700 fs/ocfs2/namei.c:2728
ocfs2_dio_end_io_write+0x2cc/0xf30 fs/ocfs2/aops.c:2329
ocfs2_dio_end_io+0x139/0x2a0 fs/ocfs2/aops.c:2427
dio_complete+0x21b/0x8e0 fs/direct-io.c:281
__blockdev_direct_IO+0x3412/0x40b0 fs/direct-io.c:1303
ocfs2_direct_IO+0x263/0x360 fs/ocfs2/aops.c:2464
generic_file_direct_write+0x19a/0x410 mm/filemap.c:3969
__generic_file_write_iter+0x11b/0x240 mm/filemap.c:4133
ocfs2_file_write_iter+0xbd0/0x21d0 fs/ocfs2/file.c:2469
do_iter_readv_writev+0x535/0x7f0 fs/read_write.c:820
vfs_writev+0x363/0xdd0 fs/read_write.c:1050
do_pwritev+0x1b1/0x270 fs/read_write.c:1146
__do_sys_pwritev2 fs/read_write.c:1204 [inline]
__se_sys_pwritev2 fs/read_write.c:1195 [inline]
__x64_sys_pwritev2+0xef/0x160 fs/read_write.c:1195
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
down_write+0x93/0x200 kernel/locking/rwsem.c:1577
ocfs2_create_local_dquot+0x158/0xb40 fs/ocfs2/quota_local.c:1232
ocfs2_acquire_dquot+0x628/0xaf0 fs/ocfs2/quota_global.c:878
dqget+0x694/0x1160 fs/quota/dquot.c:977
dquot_set_dqblk+0x2b/0x1230 fs/quota/dquot.c:2820
quota_setquota+0x4c8/0x5f0 fs/quota/quota.c:310
do_quotactl+0xb00/0x13d0 fs/quota/quota.c:802
__do_sys_quotactl fs/quota/quota.c:961 [inline]
__se_sys_quotactl fs/quota/quota.c:917 [inline]
__x64_sys_quotactl+0x1b4/0x440 fs/quota/quota.c:917
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&dquot->dq_lock){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735
wait_on_dquot fs/quota/dquot.c:354 [inline]
dqget+0x5f2/0x1160 fs/quota/dquot.c:972
__dquot_initialize+0x588/0xd50 fs/quota/dquot.c:1505
ocfs2_get_init_inode+0xe8/0x1b0 fs/ocfs2/namei.c:202
ocfs2_mknod+0x93f/0x2440 fs/ocfs2/namei.c:310
ocfs2_mkdir+0x185/0x450 fs/ocfs2/namei.c:657
vfs_mkdir+0x580/0x860 fs/namei.c:4311
do_mkdirat+0x301/0x3a0 fs/namei.c:4334
__do_sys_mkdirat fs/namei.c:4349 [inline]
__se_sys_mkdirat fs/namei.c:4347 [inline]
__x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4347
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain kernel/locking/lockdep.c:3904 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
down_write+0x93/0x200 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:818 [inline]
ocfs2_remove_inode+0x15c/0x8a0 fs/ocfs2/inode.c:655
ocfs2_wipe_inode+0x455/0x1220 fs/ocfs2/inode.c:818
ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline]
ocfs2_evict_inode+0x6da/0x1610 fs/ocfs2/inode.c:1216
evict+0x40c/0x960 fs/inode.c:796
iput_final fs/inode.c:1946 [inline]
iput fs/inode.c:1972 [inline]
iput+0x52a/0x890 fs/inode.c:1958
ocfs2_dentry_iput+0x13a/0x340 fs/ocfs2/dcache.c:411
dentry_unlink_inode+0x282/0x480 fs/dcache.c:420
__dentry_kill+0x1d0/0x600 fs/dcache.c:625
dput.part.0+0x4b1/0x9b0 fs/dcache.c:867
dput+0x1f/0x30 fs/dcache.c:857
__fput+0x515/0xb60 fs/file_table.c:458
task_work_run+0x151/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4 --> &ocfs2_quota_ip_alloc_sem_key --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]

Possible unsafe locking scenario:

CPU0 CPU1
---- ----
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
lock(&ocfs2_quota_ip_alloc_sem_key);
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4);

*** DEADLOCK ***

2 locks held by syz.3.1383/16527:
#0: ffff88806127cbd0 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0xe5/0x2e0 fs/ocfs2/dlmglue.c:2876
#1: ffff8880840ea640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
#1: ffff8880840ea640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}, at: ocfs2_wipe_inode+0x2e6/0x1220 fs/ocfs2/inode.c:776

stack backtrace:
CPU: 1 UID: 0 PID: 16527 Comm: syz.3.1383 Not tainted 6.13.0-rc7-syzkaller-00043-g619f0b6fad52 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x419/0x5d0 kernel/locking/lockdep.c:2074
check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2206
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain kernel/locking/lockdep.c:3904 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
down_write+0x93/0x200 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:818 [inline]
ocfs2_remove_inode+0x15c/0x8a0 fs/ocfs2/inode.c:655
ocfs2_wipe_inode+0x455/0x1220 fs/ocfs2/inode.c:818
ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline]
ocfs2_evict_inode+0x6da/0x1610 fs/ocfs2/inode.c:1216
evict+0x40c/0x960 fs/inode.c:796
iput_final fs/inode.c:1946 [inline]
iput fs/inode.c:1972 [inline]
iput+0x52a/0x890 fs/inode.c:1958
ocfs2_dentry_iput+0x13a/0x340 fs/ocfs2/dcache.c:411
dentry_unlink_inode+0x282/0x480 fs/dcache.c:420
__dentry_kill+0x1d0/0x600 fs/dcache.c:625
dput.part.0+0x4b1/0x9b0 fs/dcache.c:867
dput+0x1f/0x30 fs/dcache.c:857
__fput+0x515/0xb60 fs/file_table.c:458
task_work_run+0x151/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc4a9785d29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff1350af08 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000009e9e5 RCX: 00007fc4a9785d29
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fc4a9977ba0 R08: 0000000000000001 R09: 00007fff1350b1ff
R10: 00007fc4a9600000 R11: 0000000000000246 R12: 000000000009f0ae
R13: 00007fc4a9975fa0 R14: 0000000000000032 R15: ffffffffffffffff
</TASK>


---
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[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: 2d3090a8aeb5 Merge tag 'v7.1-p5' of git://git.kernel.org/p..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13d090ae580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f9e42545d0c4344f
dashboard link: https://syzkaller.appspot.com/bug?extid=ddde294b94666bb51266
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=157bb0ae580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c4e0ae580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a3b55b39a1ae/disk-2d3090a8.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e28dc81f5c8b/vmlinux-2d3090a8.xz
kernel image: https://storage.googleapis.com/syzbot-assets/979afa9a8a33/bzImage-2d3090a8.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/9da69034f0c7/mount_0.gz
fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=11c4e0ae580000)

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ddde29...@syzkaller.appspotmail.com

======================================================
WARNING: possible circular locking dependency detected

syzkaller #0 Not tainted
------------------------------------------------------
syz-executor/5782 is trying to acquire lock:
ffff8880712c6ba0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
ffff8880712c6ba0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_inode+0x15b/0x860 fs/ocfs2/inode.c:733

but task is already holding lock:

ffff88805a4f89a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
ffff88805a4f89a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode+0x2ce/0x1250 fs/ocfs2/inode.c:854

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}:
down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1625
inode_lock include/linux/fs.h:1029 [inline]
ocfs2_del_inode_from_orphan+0x112/0x700 fs/ocfs2/namei.c:2728
ocfs2_dio_end_io_write+0x711/0x1130 fs/ocfs2/aops.c:2379
ocfs2_dio_end_io+0x136/0x2c0 fs/ocfs2/aops.c:2418
dio_complete+0x224/0x950 fs/direct-io.c:281
__blockdev_direct_IO+0x2a2d/0x33d0 fs/direct-io.c:1303
ocfs2_direct_IO+0x263/0x360 fs/ocfs2/aops.c:2455
generic_file_direct_write+0x198/0x410 mm/filemap.c:4259
__generic_file_write_iter+0x11b/0x240 mm/filemap.c:4428
ocfs2_file_write_iter+0xdbb/0x2240 fs/ocfs2/file.c:2476
iter_file_splice_write+0x830/0x10a0 fs/splice.c:736
do_splice_from fs/splice.c:936 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1159
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
do_splice_direct_actor fs/splice.c:1202 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1228
do_sendfile+0xadc/0xe20 fs/read_write.c:1372
__do_sys_sendfile64 fs/read_write.c:1433 [inline]
__se_sys_sendfile64 fs/read_write.c:1419 [inline]
__x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1419
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1625
inode_lock include/linux/fs.h:1029 [inline]
ocfs2_reserve_suballoc_bits+0x11c/0x4b50 fs/ocfs2/suballoc.c:882
ocfs2_reserve_new_metadata_blocks+0x506/0xbe0 fs/ocfs2/suballoc.c:1078
ocfs2_mknod+0xead/0x27b0 fs/ocfs2/namei.c:351
ocfs2_create+0xf4/0x450 fs/ocfs2/namei.c:677
lookup_open.isra.0+0xc47/0x11b0 fs/namei.c:4511
open_last_lookups fs/namei.c:4611 [inline]
path_openat+0x2291/0x31a0 fs/namei.c:4855
do_file_open+0x20e/0x430 fs/namei.c:4887
do_sys_openat2+0x10d/0x1e0 fs/open.c:1364
do_sys_open fs/open.c:1370 [inline]
__do_sys_openat fs/open.c:1386 [inline]
__se_sys_openat fs/open.c:1381 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1381
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825
down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1625
inode_lock include/linux/fs.h:1029 [inline]
ocfs2_remove_inode+0x15b/0x860 fs/ocfs2/inode.c:733
ocfs2_wipe_inode+0x6dd/0x1250 fs/ocfs2/inode.c:896
ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]
ocfs2_evict_inode+0x7f9/0x1550 fs/ocfs2/inode.c:1299
evict+0x3c2/0xad0 fs/inode.c:841
iput_final fs/inode.c:1960 [inline]
iput.part.0+0x605/0xf50 fs/inode.c:2009
iput+0x35/0x40 fs/inode.c:1975
d_delete_notify include/linux/fsnotify.h:377 [inline]
vfs_rmdir fs/namei.c:5389 [inline]
vfs_rmdir+0x5c8/0x8a0 fs/namei.c:5349
filename_rmdir+0x31a/0x5c0 fs/namei.c:5431
__do_sys_unlinkat fs/namei.c:5606 [inline]
__se_sys_unlinkat fs/namei.c:5599 [inline]
__x64_sys_unlinkat+0xf5/0x130 fs/namei.c:5599
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94

entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:

&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE] --> &ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE] --> &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]

Possible unsafe locking scenario:

CPU0 CPU1
---- ----

lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);
lock(&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]);
lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);
lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);

*** DEADLOCK ***

4 locks held by syz-executor/5782:
#0: ffff888037c18410 (sb_writers#12){.+.+}-{0:0}, at: filename_rmdir+0x1ff/0x5c0 fs/namei.c:5420
#1: ffff8880712c25a0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1074 [inline]
#1: ffff8880712c25a0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2914 [inline]
#1: ffff8880712c25a0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2938 [inline]
#1: ffff8880712c25a0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: filename_rmdir+0x258/0x5c0 fs/namei.c:5424
#2: ffff8880355b8bc0 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0xe4/0x2e0 fs/ocfs2/dlmglue.c:2875
#3: ffff88805a4f89a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#3: ffff88805a4f89a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode+0x2ce/0x1250 fs/ocfs2/inode.c:854

stack backtrace:
CPU: 1 UID: 0 PID: 5782 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026

Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]

dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043
check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825
down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1625
inode_lock include/linux/fs.h:1029 [inline]
ocfs2_remove_inode+0x15b/0x860 fs/ocfs2/inode.c:733
ocfs2_wipe_inode+0x6dd/0x1250 fs/ocfs2/inode.c:896
ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]
ocfs2_evict_inode+0x7f9/0x1550 fs/ocfs2/inode.c:1299
evict+0x3c2/0xad0 fs/inode.c:841
iput_final fs/inode.c:1960 [inline]
iput.part.0+0x605/0xf50 fs/inode.c:2009
iput+0x35/0x40 fs/inode.c:1975
d_delete_notify include/linux/fsnotify.h:377 [inline]
vfs_rmdir fs/namei.c:5389 [inline]
vfs_rmdir+0x5c8/0x8a0 fs/namei.c:5349
filename_rmdir+0x31a/0x5c0 fs/namei.c:5431
__do_sys_unlinkat fs/namei.c:5606 [inline]
__se_sys_unlinkat fs/namei.c:5599 [inline]
__x64_sys_unlinkat+0xf5/0x130 fs/namei.c:5599
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7319b9bf77
Code: 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 07 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffc0104e08 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f7319b9bf77
RDX: 0000000000000200 RSI: 00007fffc0105fb0 RDI: 00000000ffffff9c
RBP: 00007f7319c321ca R08: 0000000000018550 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000207 R12: 00007fffc0105fb0
R13: 00007f7319c321ca R14: 000000000001aa05 R15: 00007fffc0108170
</TASK>
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)


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