BUG: MAX_STACK_TRACE_ENTRIES too low!
turning off the locking correctness validator.
CPU: 1 PID: 9003 Comm: syz-executor.2 Not tainted 5.2.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x86/0xca lib/dump_stack.c:113
 save_trace kernel/locking/lockdep.c:471 [inline]
 save_trace.isra.10.cold.23+0x13/0x18 kernel/locking/lockdep.c:456
 check_prev_add kernel/locking/lockdep.c:2442 [inline]
 check_prevs_add kernel/locking/lockdep.c:2502 [inline]
 validate_chain kernel/locking/lockdep.c:2892 [inline]
 __lock_acquire+0x457d/0x5020 kernel/locking/lockdep.c:3886
 lock_acquire+0x111/0x2d0 kernel/locking/lockdep.c:4402
 flush_workqueue+0xf2/0x1360 kernel/workqueue.c:2774
 ext4_sync_fs+0x11d/0x770 fs/ext4/super.c:5116
 __sync_filesystem fs/sync.c:39 [inline]
 sync_filesystem+0xd4/0x200 fs/sync.c:64
 generic_shutdown_super+0x69/0x330 fs/super.c:444
 kill_block_super+0x96/0xe0 fs/super.c:1373
 deactivate_locked_super+0x77/0xd0 fs/super.c:331
 deactivate_super fs/super.c:362 [inline]
 deactivate_super+0x13f/0x160 fs/super.c:358
 cleanup_mnt+0xa3/0x140 fs/namespace.c:1120
 __cleanup_mnt+0xd/0x10 fs/namespace.c:1127
 task_work_run+0x108/0x180 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:185 [inline]
 exit_to_usermode_loop+0x129/0x150 arch/x86/entry/common.c:168
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
 do_syscall_64+0x3e1/0x480 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x467a37
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdd9fe3e28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000467a37
RDX: 00007ffdd9fe3efb RSI: 0000000000000002 RDI: 00007ffdd9fe3ef0
RBP: 00007ffdd9fe3ef0 R08: 00000000ffffffff R09: 00007ffdd9fe3cc0
R10: 000055555686f8e3 R11: 0000000000000246 R12: 00000000004bee70
R13: 00007ffdd9fe4fc0 R14: 000055555686f810 R15: 00007ffdd9fe5000