------------[ cut here ]------------
WARNING: CPU: 1 PID: 8103 at kernel/rcu/tree.c:760 rcu_irq_exit+0x15/0x20 kernel/rcu/tree.c:760
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8103 Comm: kworker/1:5 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events pwq_unbound_release_workfn
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x4a kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:rcu_irq_exit+0x15/0x20 kernel/rcu/tree.c:760
Code: 11 fd ff ff 5b 5d c3 0f 0b e9 7c ff ff ff 0f 0b eb 91 0f 1f 00 8b 05 a6 68 c8 02 85 c0 74 0d 65 8b 05 9b a9 10 78 85 c0 74 02 <0f> 0b e9 34 ff ff ff 0f 1f 40 00 41 54 55 48 c7 c5 c0 6b 03 00 53
RSP: 0018:ffffc900172b7730 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 0000000000000082 RCX: ffffffff817a03c7
RDX: ffff88809f160080 RSI: ffffffff81620441 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880ae736ca3
R10: 0000000000000000 R11: 000000002d2d2d2d R12: 0000000000000000
R13: 000000000000003c R14: dffffc0000000000 R15: 0000000000000000
 rcu_irq_exit_irqson+0x76/0x140 kernel/rcu/tree.c:815
 trace_console_rcuidle include/trace/events/printk.h:10 [inline]
 call_console_drivers kernel/printk/printk.c:1839 [inline]
 console_unlock+0x839/0xe90 kernel/printk/printk.c:2542
 vprintk_emit+0x2c0/0x740 kernel/printk/printk.c:2069
 vprintk_func+0x8f/0x1a6 kernel/printk/printk_safe.c:393
 printk+0xba/0xed kernel/printk/printk.c:2117
 report_bug.cold+0x72/0xb3 lib/bug.c:194
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:rcu_irq_enter+0x15/0x20 kernel/rcu/tree.c:1045
Code: 00 00 00 4c 89 e7 e8 3a d0 c2 f9 eb b4 0f 0b eb 8b 0f 1f 40 00 8b 05 e6 67 c8 02 85 c0 74 0d 65 8b 05 db a8 10 78 85 c0 74 02 <0f> 0b e9 44 ff ff ff cc cc cc cc 41 55 49 89 fd 41 54 55 48 89 f5
RSP: 0018:ffffc900172b7af8 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 0000000000000082 RCX: ffffffff817a03c7
RDX: ffff88809f160080 RSI: ffffffff816206c1 RDI: 0000000000000005
RBP: ffffffff8cc2c9b0 R08: 0000000000000000 R09: ffffffff8ab9994f
R10: 0000000000000000 R11: 0000000000000178 R12: 0000000000000082
R13: ffffffff87f3eaa6 R14: 0000000000000000 R15: ffffffff89c52900
 rcu_irq_enter_irqson+0x76/0x140 kernel/rcu/tree.c:1060
 trace_irq_disable_rcuidle include/trace/events/preemptirq.h:36 [inline]
 trace_irq_disable_rcuidle include/trace/events/preemptirq.h:36 [inline]
 trace_hardirqs_off kernel/trace/trace_preemptirq.c:82 [inline]
 trace_hardirqs_off+0x114/0x210 kernel/trace/trace_preemptirq.c:74
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
 _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:159
 debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:636
 debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline]
 __call_rcu kernel/rcu/tree.c:2869 [inline]
 call_rcu+0x2c/0x7e0 kernel/rcu/tree.c:2957
 lockdep_unregister_key+0x21d/0x570 kernel/locking/lockdep.c:5684
 wq_unregister_lockdep kernel/workqueue.c:3461 [inline]
 pwq_unbound_release_workfn+0x227/0x2d0 kernel/workqueue.c:3693
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Kernel Offset: disabled