rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=bf6/1/0x4000000000000002 softirq=105091/105091 fqs=5206 
	(t=10502 jiffies g=115537 q=722)
NMI backtrace for cpu 0
CPU: 0 PID: 10082 Comm: syz-executor.4 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x90/0xe0 kernel/locking/spinlock.c:191
Code: 48 c7 c0 d8 34 93 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d ff 71 ca 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 a1 f8 87 f9 65 8b 05 92 5b 39 78
RSP: 0000:ffffc90002717ca8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff132669b RBX: 0000000000000282 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000282
RBP: ffffc90002717cb8 R08: ffff8880a46be200 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888097da5600
R13: ffff8880a46be920 R14: 000000000000000a R15: 000000000000000b
 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline]
 force_sig_info_to_task+0x2a2/0x340 kernel/signal.c:1329
 force_sig_fault_to_task kernel/signal.c:1671 [inline]
 force_sig_fault+0xbe/0x100 kernel/signal.c:1678
 __bad_area_nosemaphore+0x32e/0x420 arch/x86/mm/fault.c:904
 __bad_area arch/x86/mm/fault.c:933 [inline]
 bad_area+0x69/0x80 arch/x86/mm/fault.c:939
 do_user_addr_fault arch/x86/mm/fault.c:1404 [inline]
 __do_page_fault+0x9eb/0xd80 arch/x86/mm/fault.c:1506
 do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1530
 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1203
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:00007f2e72a92a70 EFLAGS: 00010206
RAX: 000000002850d960 RBX: 0000000000000007 RCX: 0000000000414717
RDX: 323085925013141b RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 00007f2e72a92a70 R09: 000000000075bf20
R10: 0000000000000000 R11: 0000000000000000 R12: 00007f2e72a936d4
R13: 00000000004cae63 R14: 00000000004e44b0 R15: 00000000ffffffff