rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10562 ticks this GP) idle=3ae/1/0x4000000000000002 softirq=93391/93393 fqs=5193 
	(t=10502 jiffies g=116057 q=1033)
NMI backtrace for cpu 1
CPU: 1 PID: 23831 Comm: syz-executor.5 Not tainted 5.5.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq.cold+0x509/0xc02 kernel/rcu/tree.c:2271
 update_process_times+0x2d/0x70 kernel/time/timer.c:1726
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1310
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4f/0x80 kernel/locking/spinlock.c:199
Code: c0 e8 34 93 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 12 76 ca 01 00 74 20 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 a7 fc 87 f9 65 8b 05 98 5f 39 78 85 c0 74 06 41
RSP: 0000:ffffc90002f77ca0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff132669d RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff88804faf2e94
RBP: ffffc90002f77ca8 R08: ffff88804faf2600 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a73402c0
R13: ffff8880a7340400 R14: dffffc0000000000 R15: 000000000000000b
 spin_unlock_irq include/linux/spinlock.h:388 [inline]
 get_signal+0x1bee/0x24f0 kernel/signal.c:2737
 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815
 exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:160
 prepare_exit_to_usermode+0x321/0x3a0 arch/x86/entry/common.c:195
 ret_from_intr+0x26/0x36
RIP: 0033:0x4057e9
Code: d0 ff ff ff 01 48 8b 7c 24 28 c7 44 24 34 00 00 00 00 e8 4a d3 01 00 85 c0 75 23 48 6b 44 24 20 18 8b 7c 24 1c 48 03 44 24 38 <48> 8b 48 10 48 8b 50 08 48 8b 30 e8 e7 ee 00 00 89 44 24 34 64 f0
RSP: 002b:00007fc71e4eea70 EFLAGS: 00010202
RAX: 0000000028b09520 RBX: 0000000000000007 RCX: 0000000000414717
RDX: bd4945ec88fd0d46 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 00007fc71e4eea70 R09: 000000000075bf20
R10: 0000000000000000 R11: 0000000000000000 R12: 00007fc71e4ef6d4
R13: 00000000004cae63 R14: 00000000004e44b0 R15: 00000000ffffffff