rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=ef6/1/0x4000000000000004 softirq=128105/128107 fqs=5241 
	(t=10501 jiffies g=161981 q=853)
NMI backtrace for cpu 0
CPU: 0 PID: 1663 Comm: syz-executor.0 Not tainted 5.5.0-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:475 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:549 [inline]
 rcu_pending kernel/rcu/tree.c:3030 [inline]
 rcu_sched_clock_irq.cold+0x51a/0xc37 kernel/rcu/tree.c:2276
 update_process_times+0x2d/0x70 kernel/time/timer.c:1726
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:171
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1314
 __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
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:180
Code: ff cc cc cc cc cc cc cc cc cc 65 48 8b 04 25 c0 1e 02 00 48 8b 80 98 13 00 00 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 65 48 8b 04 25 c0 1e 02 00 65 8b 15 34 e9 8c 7e 81 e2
RSP: 0018:ffffc90000007b98 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 00000000000284c0 RBX: 0000000100018a3c RCX: dffffc0000000000
RDX: 0000000000000100 RSI: ffffc90000007c58 RDI: ffff88803bacd458
RBP: ffffc90000007be8 R08: ffff88802cbf03c0 R09: ffffed1007759a95
R10: ffffed1007759a94 R11: ffff88803bacd4a3 R12: ffff88803bacd458
R13: dffffc0000000000 R14: ffff88803bacd458 R15: ffffed1007759a8f
 __mod_timer kernel/time/timer.c:1008 [inline]
 mod_timer+0x5b5/0xc10 kernel/time/timer.c:1100
 mrp_periodic_timer_arm+0x4a/0x70 net/802/mrp.c:601
 mrp_periodic_timer+0x46/0x50 net/802/mrp.c:614
 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x50 kernel/kcov.c:192
Code: e9 8c 7e 81 e2 00 01 1f 00 48 8b 75 08 75 2b 8b 90 80 13 00 00 83 fa 02 75 20 48 8b 88 88 13 00 00 8b 80 84 13 00 00 48 8b 11 <48> 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65
RSP: 0018:ffffc90016ddfd58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: ffffc90016ddfea8 RCX: ffffc90006351000
RDX: 00000000000033e6 RSI: ffffffff8165df8b RDI: ffffc90016ddfea8
RBP: ffffc90016ddfd58 R08: ffff88802cbf03c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff92002dbbfbe
R13: 1ffff92002dbbfd1 R14: ffffc90016ddfe50 R15: dffffc0000000000
 ktime_get_ts64+0x1b/0x3e0 kernel/time/timekeeping.c:887
 posix_get_monotonic_timespec+0x75/0x290 kernel/time/posix-timers.c:198
 __do_sys_clock_gettime kernel/time/posix-timers.c:1091 [inline]
 __se_sys_clock_gettime kernel/time/posix-timers.c:1081 [inline]
 __x64_sys_clock_gettime+0x151/0x240 kernel/time/posix-timers.c:1081
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45e1da
Code: 25 18 00 00 00 00 74 01 f0 48 0f b1 3d 6f a7 61 00 48 39 c2 75 da f3 c3 0f 1f 84 00 00 00 00 00 48 63 ff b8 e4 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 f3 c3 0f 1f 40 00 48 c7 c2 d4 ff ff ff f7
RSP: 002b:00007fee94c54c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4
RAX: ffffffffffffffda RBX: 000000000075bf28 RCX: 000000000045e1da
RDX: 00000000000f4240 RSI: 00007fee94c54c60 RDI: 0000000000000001
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c
R13: 0000000000000096 R14: 00000000004c1e21 R15: 000000000075bf2c