------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 1 PID: 1616 at kernel/locking/lockdep.c:1699 print_bfs_bug+0x53/0x70 kernel/locking/lockdep.c:1699 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 1616 Comm: kworker/u5:0 Not tainted 5.6.0-rc3-next-20200228-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci3795 wq_barrier_func Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:175 [inline] fixup_bug arch/x86/kernel/traps.c:170 [inline] do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:print_bfs_bug+0x53/0x70 kernel/locking/lockdep.c:1699 Code: 32 b8 3b 08 00 74 28 48 c7 c7 a0 29 80 8d e8 b4 77 01 00 66 90 85 db 75 03 5b 5d c3 89 ee 48 c7 c7 80 7e 2b 88 e8 55 4f ec ff <0f> 0b 5b 5d c3 0f 0b 48 c7 c7 b0 c9 93 89 e8 ea a5 57 00 eb be 0f RSP: 0018:ffffc900055d76e8 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815c5011 RDI: fffff52000abaecf RBP: 00000000ffffffff R08: ffff8880a4fa4140 R09: ffffed1015ca45c9 R10: ffffed1015ca45c8 R11: ffff8880ae522e43 R12: ffff8880a4fa4a80 R13: 0000000000000000 R14: ffffc900055d7800 R15: 1ffff92000abaeec check_irq_usage+0x612/0x9e0 kernel/locking/lockdep.c:2246 check_prev_add kernel/locking/lockdep.c:2485 [inline] check_prevs_add kernel/locking/lockdep.c:2586 [inline] validate_chain kernel/locking/lockdep.c:3203 [inline] __lock_acquire+0x24ba/0x53f0 kernel/locking/lockdep.c:4190 lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4720 write_seqcount_begin_nested include/linux/seqlock.h:408 [inline] write_seqcount_begin include/linux/seqlock.h:413 [inline] psi_group_change kernel/sched/psi.c:690 [inline] psi_task_change+0x276/0x9f0 kernel/sched/psi.c:781 psi_enqueue kernel/sched/stats.h:82 [inline] enqueue_task kernel/sched/core.c:1301 [inline] activate_task+0x20f/0x470 kernel/sched/core.c:1327 ttwu_do_activate+0xca/0x130 kernel/sched/core.c:2258 ttwu_queue kernel/sched/core.c:2403 [inline] try_to_wake_up+0xace/0x17c0 kernel/sched/core.c:2637 __wake_up_common+0x147/0x650 kernel/sched/wait.c:93 complete+0x51/0x70 kernel/sched/completion.c:36 process_one_work+0x94b/0x1690 kernel/workqueue.c:2266 process_scheduled_works kernel/workqueue.c:2328 [inline] worker_thread+0x7ab/0xe20 kernel/workqueue.c:2414 kthread+0x357/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..