====================================================== WARNING: possible circular locking dependency detected 6.14.0-rc7-syzkaller-00067-g76b6905c11fd #0 Not tainted ------------------------------------------------------ syz-executor212/5831 is trying to acquire lock: ffff88814830f148 ((wq_completion)ocfs2_wq){+.+.}-{0:0}, at: touch_wq_lockdep_map+0xb1/0x170 kernel/workqueue.c:3907 but task is already holding lock: ffff888034c3e0e0 (&type->s_umount_key#43){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] ffff888034c3e0e0 (&type->s_umount_key#43){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] ffff888034c3e0e0 (&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+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 ptrace_notify+0x2d9/0x380 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/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#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-executor212/5831: #0: ffff888034c3e0e0 (&type->s_umount_key#43){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff888034c3e0e0 (&type->s_umount_key#43){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff888034c3e0e0 (&type->s_umount_key#43){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 stack backtrace: CPU: 1 UID: 0 PID: 5831 Comm: syz-executor212 Not tainted 6.14.0-rc7-syzkaller-00067-g76b6905c11fd #0 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+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 ptrace_notify+0x2d9/0x380 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/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb9d7317487 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:00007ffc19f4a6f8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fb9d7317487 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc19f4a7b0 RBP: 00007ffc19f4a7b0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffc19f4b820 R13: 000055555eb966c0 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)