======================================================
WARNING: possible circular locking dependency detected
6.1.134-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor/4262 is trying to acquire lock:
ffff888027c94138 ((wq_completion)ocfs2_wq){+.+.}-{0:0}, at: __flush_workqueue+0x157/0x1610 kernel/workqueue.c:2812
but task is already holding lock:
ffff88807d4860e0 (&type->s_umount_key#81){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:362
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&type->s_umount_key#81){++++}-{3:3}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
down_read+0xad/0xa30 kernel/locking/rwsem.c:1520
ocfs2_finish_quota_recovery+0x158/0x2300 fs/ocfs2/quota_local.c:600
ocfs2_complete_recovery+0x18e2/0x2840 fs/ocfs2/journal.c:1324
process_one_work+0x917/0x1260 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
-> #1 ((work_completion)(&journal->j_recovery_work)){+.+.}-{0:0}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
process_one_work+0x839/0x1260 kernel/workqueue.c:2268
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
-> #0 ((wq_completion)ocfs2_wq){+.+.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__flush_workqueue+0x170/0x1610 kernel/workqueue.c:2812
ocfs2_shutdown_local_alloc+0x105/0xa90 fs/ocfs2/localalloc.c:379
ocfs2_dismount_volume+0x1fb/0x960 fs/ocfs2/super.c:1879
generic_shutdown_super+0x130/0x340 fs/super.c:501
kill_block_super+0x7a/0xe0 fs/super.c:1470
deactivate_locked_super+0xa0/0x110 fs/super.c:332
cleanup_mnt+0x490/0x520 fs/namespace.c:1186
task_work_run+0x246/0x300 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
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#81
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&type->s_umount_key#81);
lock((work_completion)(&journal->j_recovery_work));
lock(&type->s_umount_key#81);
lock((wq_completion)ocfs2_wq);
*** DEADLOCK ***
1 lock held by syz-executor/4262:
#0: ffff88807d4860e0 (&type->s_umount_key#81){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:362
stack backtrace:
CPU: 1 PID: 4262 Comm: syz-executor Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2170
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__flush_workqueue+0x170/0x1610 kernel/workqueue.c:2812
ocfs2_shutdown_local_alloc+0x105/0xa90 fs/ocfs2/localalloc.c:379
ocfs2_dismount_volume+0x1fb/0x960 fs/ocfs2/super.c:1879
generic_shutdown_super+0x130/0x340 fs/super.c:501
kill_block_super+0x7a/0xe0 fs/super.c:1470
deactivate_locked_super+0xa0/0x110 fs/super.c:332
cleanup_mnt+0x490/0x520 fs/namespace.c:1186
task_work_run+0x246/0x300 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc34a18e497
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe497b02e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc34a20e77c RCX: 00007fc34a18e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe497b03a0
RBP: 00007ffe497b03a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe497b1430
R13: 00007fc34a20e77c R14: 00000000000d7d10 R15: 00007ffe497b1470
</TASK>
ocfs2: Unmounting device (7,2) on (node local)