rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10499 ticks this GP) idle=b92/1/0x4000000000000000 softirq=333067/333067 fqs=5165 (t=10500 jiffies g=462121 q=195502) NMI backtrace for cpu 1 CPU: 1 PID: 23853 Comm: syz-executor.1 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x1f4/0x230 kernel/rcu/tree_stall.h:337 print_cpu_stall kernel/rcu/tree_stall.h:569 [inline] check_cpu_stall kernel/rcu/tree_stall.h:643 [inline] rcu_pending kernel/rcu/tree.c:3751 [inline] rcu_sched_clock_irq.cold+0x48e/0xedf kernel/rcu/tree.c:2580 update_process_times+0x16d/0x200 kernel/time/timer.c:1782 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1369 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1102 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x6b/0x70 kernel/kcov.c:286 Code: 00 00 00 48 39 fe 72 22 44 89 c6 48 83 c2 01 48 89 4c 38 f0 48 c7 44 38 e0 05 00 00 00 48 89 74 38 e8 4e 89 54 c8 20 48 89 10 0f 1f 40 00 49 89 f8 bf 03 00 00 00 4c 8b 14 24 48 89 f1 65 48 RSP: 0018:ffffc90000db0d50 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000100 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff888093573780 RDI: 0000000000000003 RBP: ffffc90000db0d90 R08: 0000000000000007 R09: ffffffff8f866877 R10: ffffffff816259c0 R11: 0000000000000000 R12: ffff88801a520810 R13: 1ffff920001b61ac R14: ffffffff87130b60 R15: 0000000000000001 cpu_max_bits_warn include/linux/cpumask.h:137 [inline] cpumask_check include/linux/cpumask.h:144 [inline] cpumask_test_cpu include/linux/cpumask.h:373 [inline] trace_timer_expire_entry include/trace/events/timer.h:90 [inline] call_timer_fn+0x150/0x6b0 kernel/time/timer.c:1416 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:notifier_chain_unregister kernel/notifier.c:47 [inline] RIP: 0010:raw_notifier_chain_unregister+0x6a/0x110 kernel/notifier.c:379 Code: 00 00 00 00 fc ff df 75 0c eb 3f e8 10 dc 26 00 49 39 dd 74 35 e8 06 dc 26 00 48 8d 6b 08 48 89 e8 48 c1 e8 03 42 80 3c 20 00 <75> 74 48 8b 5b 08 48 85 db 75 d6 e8 e6 db 26 00 41 bc fe ff ff ff RSP: 0018:ffffc900075cf9e0 EFLAGS: 00000246 RAX: 1ffffffff1ab3ee1 RBX: ffffffff8d59f700 RCX: 0000000000000000 RDX: ffff888093573780 RSI: ffffffff814bf55a RDI: ffffffff9073f0a0 RBP: ffffffff8d59f708 R08: 0000000000000000 R09: ffffffff8d4590c7 R10: fffffbfff1a8b218 R11: 0000000000000001 R12: dffffc0000000000 R13: ffff8880789c94c0 R14: 0000000000000000 R15: ffff8880329822f0 unregister_netdevice_notifier+0x32/0x170 net/core/dev.c:1870 raw_release+0x58/0x890 net/can/raw.c:352 __sock_release+0xcd/0x280 net/socket.c:597 sock_close+0x18/0x20 net/socket.c:1256 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0xc5c/0x2ae0 kernel/exit.c:825 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x427/0x20f0 kernel/signal.c:2773 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 Code: Unable to access opcode bytes at RIP 0x465adf. RSP: 002b:00007fb3cd511188 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: 0000000000000000 RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 00000000000001ff RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 0000000000a9fb1f R14: 00007fb3cd511300 R15: 0000000000022000