======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0 Not tainted
------------------------------------------------------
syz-executor298/5305 is trying to acquire lock:
ffff8880408fe948 ((wq_completion)ocfs2_wq){+.+.}-{0:0}, at: touch_wq_lockdep_map+0xb1/0x170 kernel/workqueue.c:3907
but task is already holding lock:
ffff8880341c20e0 (&type->s_umount_key#42){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
ffff8880341c20e0 (&type->s_umount_key#42){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
ffff8880341c20e0 (&type->s_umount_key#42){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&type->s_umount_key#42){++++}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
ocfs2_finish_quota_recovery+0x15c/0x22a0 fs/ocfs2/quota_local.c:603
ocfs2_complete_recovery+0x17c1/0x25c0 fs/ocfs2/journal.c:1357
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd30 kernel/workqueue.c:3400
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #1 ((work_completion)(&journal->j_recovery_work)){+.+.}-{0:0}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
process_one_work kernel/workqueue.c:3214 [inline]
process_scheduled_works+0x9e4/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd30 kernel/workqueue.c:3400
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #0 ((wq_completion)ocfs2_wq){+.+.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
touch_wq_lockdep_map+0xc7/0x170 kernel/workqueue.c:3907
__flush_workqueue+0x14a/0x1280 kernel/workqueue.c:3949
ocfs2_shutdown_local_alloc+0x109/0xa90 fs/ocfs2/localalloc.c:380
ocfs2_dismount_volume+0x202/0x910 fs/ocfs2/super.c:1822
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
kill_block_super+0x44/0x90 fs/super.c:1710
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1413
task_work_run+0x24f/0x310 kernel/task_work.c:227
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+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
(wq_completion)ocfs2_wq --> (work_completion)(&journal->j_recovery_work) --> &type->s_umount_key#42
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&type->s_umount_key#42);
lock((work_completion)(&journal->j_recovery_work));
lock(&type->s_umount_key#42);
lock((wq_completion)ocfs2_wq);
*** DEADLOCK ***
1 lock held by syz-executor298/5305:
#0: ffff8880341c20e0 (&type->s_umount_key#42){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880341c20e0 (&type->s_umount_key#42){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880341c20e0 (&type->s_umount_key#42){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
stack backtrace:
CPU: 0 UID: 0 PID: 5305 Comm: syz-executor298 Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2076
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2208
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
touch_wq_lockdep_map+0xc7/0x170 kernel/workqueue.c:3907
__flush_workqueue+0x14a/0x1280 kernel/workqueue.c:3949
ocfs2_shutdown_local_alloc+0x109/0xa90 fs/ocfs2/localalloc.c:380
ocfs2_dismount_volume+0x202/0x910 fs/ocfs2/super.c:1822
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
kill_block_super+0x44/0x90 fs/super.c:1710
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1413
task_work_run+0x24f/0x310 kernel/task_work.c:227
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+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6435744487
Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd110e34e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6435744487
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd110e35a0
RBP: 00007ffd110e35a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffd110e4610
R13: 000055555ba646c0 R14: 0000000000000001 R15: 431bde82d7b634db
</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)