BUG: MAX_STACK_TRACE_ENTRIES too low! turning off the locking correctness validator. CPU: 1 PID: 24842 Comm: syz-executor081 Not tainted 5.2.0-next-20190708 #33 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+0x172/0x1f0 lib/dump_stack.c:113 save_trace kernel/locking/lockdep.c:473 [inline] save_trace.isra.0.cold+0x14/0x19 kernel/locking/lockdep.c:458 mark_lock+0x3db/0x11e0 kernel/locking/lockdep.c:3583 mark_usage kernel/locking/lockdep.c:3509 [inline] __lock_acquire+0x1409/0x4c30 kernel/locking/lockdep.c:3834 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 flush_workqueue+0x126/0x14b0 kernel/workqueue.c:2774 drain_workqueue+0x1b4/0x470 kernel/workqueue.c:2939 destroy_workqueue+0x21/0x6c0 kernel/workqueue.c:4320 io_finish_async+0xd5/0x140 fs/io_uring.c:2474 io_ring_ctx_free fs/io_uring.c:2982 [inline] io_ring_ctx_wait_and_kill+0x133/0x600 fs/io_uring.c:3046 io_uring_release+0x42/0x50 fs/io_uring.c:3054 __fput+0x2ff/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x145/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x92f/0x2ea0 kernel/exit.c:877 do_group_exit+0x135/0x360 kernel/exit.c:981 __do_sys_exit_group kernel/exit.c:992 [inline] __se_sys_exit_group kernel/exit.c:990 [inline] __x64_sys_exit_group+0x44/0x50 kernel/exit.c:990 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x445408 Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 RSP: 002b:00007ffe775a8b18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445408 RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 RBP: 00000000004cca10 R08: 00000000000000e7 R09: ffffffffffffffd0 R10: 00007f0fa26d6700 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000006e0320 R14: 0000000000000001 R15: 000000000000002d