BUG: MAX_STACK_TRACE_ENTRIES too low! turning off the locking correctness validator. CPU: 1 PID: 844 Comm: syz-executor034 Not tainted 5.0.0+ #9 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:467 [inline] save_trace.cold+0x14/0x19 kernel/locking/lockdep.c:437 mark_lock+0x2fb/0x1380 kernel/locking/lockdep.c:3401 __lock_acquire+0x548/0x3fb0 kernel/locking/lockdep.c:3648 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4202 flush_workqueue+0x126/0x14c0 kernel/workqueue.c:2680 drain_workqueue+0x1b4/0x470 kernel/workqueue.c:2845 destroy_workqueue+0x21/0x700 kernel/workqueue.c:4218 ucma_close+0x289/0x320 drivers/infiniband/core/ucma.c:1779 __fput+0x2df/0x8d0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x400ef0 Code: 01 f0 ff ff 0f 83 d0 0a 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d dd 17 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 a4 0a 00 00 c3 48 83 ec 08 e8 5a 01 00 00 RSP: 002b:00007ffcbb944758 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000400ef0 RDX: 0000000000000002 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 0000000000033e6f R08: 0000000000000004 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401e20 R13: 0000000000401eb0 R14: 0000000000000000 R15: 0000000000000000