====================================================== WARNING: possible circular locking dependency detected 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 Not tainted ------------------------------------------------------ syz-executor122/5825 is trying to acquire lock: ffff888031cf2948 ((wq_completion)ocfs2_wq){+.+.}-{0:0}, at: touch_wq_lockdep_map+0xb1/0x170 kernel/workqueue.c:3907 but task is already holding lock: ffff88807d0fe0e0 (&type->s_umount_key#43){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] ffff88807d0fe0e0 (&type->s_umount_key#43){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] ffff88807d0fe0e0 (&type->s_umount_key#43){++++}-{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#43){++++}-{4:4}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 down_read+0xb3/0xa50 kernel/locking/rwsem.c:1524 ocfs2_finish_quota_recovery+0x15e/0x2310 fs/ocfs2/quota_local.c:603 ocfs2_complete_recovery+0x1977/0x2580 fs/ocfs2/journal.c:1357 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd50 kernel/workqueue.c:3400 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #1 ((work_completion)(&journal->j_recovery_work)){+.+.}-{0:0}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 process_one_work kernel/workqueue.c:3214 [inline] process_scheduled_works+0x9e9/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd50 kernel/workqueue.c:3400 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #0 ((wq_completion)ocfs2_wq){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xa69/0x24e0 kernel/locking/lockdep.c:3909 __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 touch_wq_lockdep_map+0xc7/0x170 kernel/workqueue.c:3907 __flush_workqueue+0x14c/0x1280 kernel/workqueue.c:3949 ocfs2_shutdown_local_alloc+0x10b/0xab0 fs/ocfs2/localalloc.c:380 ocfs2_dismount_volume+0x204/0x910 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+0x422/0x4c0 fs/namespace.c:1435 task_work_run+0x251/0x310 kernel/task_work.c:227 ptrace_notify+0x2dc/0x390 kernel/signal.c:2522 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc7/0x1d0 kernel/entry/common.c:173 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline] syscall_exit_to_user_mode+0x24a/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100 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#43 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&type->s_umount_key#43); lock((work_completion)(&journal->j_recovery_work)); lock(&type->s_umount_key#43); lock((wq_completion)ocfs2_wq); *** DEADLOCK *** 1 lock held by syz-executor122/5825: #0: ffff88807d0fe0e0 (&type->s_umount_key#43){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff88807d0fe0e0 (&type->s_umount_key#43){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88807d0fe0e0 (&type->s_umount_key#43){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 stack backtrace: CPU: 0 UID: 0 PID: 5825 Comm: syz-executor122 Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2079 check_noncircular+0x142/0x160 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xa69/0x24e0 kernel/locking/lockdep.c:3909 __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 touch_wq_lockdep_map+0xc7/0x170 kernel/workqueue.c:3907 __flush_workqueue+0x14c/0x1280 kernel/workqueue.c:3949 ocfs2_shutdown_local_alloc+0x10b/0xab0 fs/ocfs2/localalloc.c:380 ocfs2_dismount_volume+0x204/0x910 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+0x422/0x4c0 fs/namespace.c:1435 task_work_run+0x251/0x310 kernel/task_work.c:227 ptrace_notify+0x2dc/0x390 kernel/signal.c:2522 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc7/0x1d0 kernel/entry/common.c:173 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline] syscall_exit_to_user_mode+0x24a/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe4ec358487 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:00007ffc1d991628 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe4ec358487 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc1d9916e0 RBP: 00007ffc1d9916e0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffc1d992750 R13: 000055555723d6c0 R14: 0000000000000001 R15: 431bde82d7b634db 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)