rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ WARNING: CPU: 1 PID: 17816 at kernel/sched/core.c:3013 rq_unlock kernel/sched/sched.h:1325 [inline] WARNING: CPU: 1 PID: 17816 at kernel/sched/core.c:3013 try_invoke_on_locked_down_task+0x12d/0x270 kernel/sched/core.c:3019 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 17816 Comm: syz-executor.4 Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1f0/0x31e lib/dump_stack.c:118 panic+0x264/0x7a0 kernel/panic.c:231 __warn+0x227/0x250 kernel/panic.c:600 report_bug+0x1b1/0x2e0 lib/bug.c:198 handle_bug+0x42/0x80 arch/x86/kernel/traps.c:234 exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:try_invoke_on_locked_down_task+0x12d/0x270 kernel/sched/sched.h:1325 Code: f8 48 c1 e8 03 42 8a 04 38 84 c0 0f 85 10 01 00 00 8b 74 24 18 48 89 ef e8 b0 46 09 00 4c 89 ef e8 e8 98 db 06 e9 a4 00 00 00 <0f> 0b e9 2b ff ff ff 48 c7 c1 74 39 8f 89 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc90000da89a0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffffff894ff300 RCX: 55096913b2e17b00 RDX: ffffc90000da8a50 RSI: ffffffff8162d430 RDI: ffff88804da0e500 RBP: ffffffff8162d430 R08: ffffffff817abfa4 R09: fffffbfff129f899 R10: fffffbfff129f899 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff894ff300 R14: ffff88804da0e500 R15: dffffc0000000000 rcu_print_task_stall kernel/rcu/tree_stall.h:267 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:475 [inline] check_cpu_stall kernel/rcu/tree_stall.h:634 [inline] rcu_pending kernel/rcu/tree.c:3637 [inline] rcu_sched_clock_irq+0x12bc/0x1eb0 kernel/rcu/tree.c:2519 update_process_times+0x130/0x1b0 kernel/time/timer.c:1710 tick_sched_handle kernel/time/tick-sched.c:176 [inline] tick_sched_timer+0x25e/0x410 kernel/time/tick-sched.c:1328 __run_hrtimer kernel/time/hrtimer.c:1524 [inline] __hrtimer_run_queues+0x42d/0x930 kernel/time/hrtimer.c:1588 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline] sysvec_apic_timer_interrupt+0xd0/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x57/0x80 kernel/locking/spinlock.c:199 Code: 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 08 15 4d 89 e8 8a 52 88 f9 48 83 3d 7a 98 20 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 ef 55 24 f9 65 8b 05 64 81 d5 77 85 c0 74 02 5b RSP: 0018:ffffc90000da8e10 EFLAGS: 00000286 RAX: 1ffffffff129a2a1 RBX: ffff8880ae925400 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff882c7c5f RBP: ffffc90000da8f18 R08: dffffc0000000000 R09: fffffbfff167d4b9 R10: fffffbfff167d4b9 R11: 0000000000000000 R12: ffff8880a2b60c10 R13: dffffc0000000000 R14: ffff8880ae925400 R15: ffffffff868d1920 expire_timers kernel/time/timer.c:1457 [inline] __run_timers+0x64e/0x830 kernel/time/timer.c:1755 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1768 __do_softirq+0x236/0x66c kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x91/0xe0 arch/x86/kernel/irq_64.c:77 do_softirq+0xf9/0x190 kernel/softirq.c:343 __local_bh_enable_ip+0x13f/0x180 kernel/softirq.c:195 spin_unlock_bh include/linux/spinlock.h:399 [inline] ip_vs_dst_event+0x6de/0x700 net/netfilter/ipvs/ip_vs_ctl.c:1727 notifier_call_chain kernel/notifier.c:83 [inline] __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:2033 [inline] call_netdevice_notifiers_extack net/core/dev.c:2045 [inline] call_netdevice_notifiers net/core/dev.c:2059 [inline] dev_close_many+0x31a/0x4d0 net/core/dev.c:1634 rollback_registered_many+0x454/0x1380 net/core/dev.c:9258 rollback_registered net/core/dev.c:9326 [inline] unregister_netdevice_queue+0x2f3/0x4b0 net/core/dev.c:10407 unregister_netdevice include/linux/netdevice.h:2774 [inline] __tun_detach+0x13b8/0x1c60 drivers/net/tun.c:691 tun_detach drivers/net/tun.c:708 [inline] tun_chr_close+0xed/0x130 drivers/net/tun.c:3408 __fput+0x34f/0x7b0 fs/file_table.c:281 task_work_run+0x137/0x1c0 kernel/task_work.c:141 exit_task_work include/linux/task_work.h:25 [inline] do_exit+0x5f3/0x1f20 kernel/exit.c:806 do_group_exit+0x161/0x2d0 kernel/exit.c:903 get_signal+0x13bb/0x1d50 kernel/signal.c:2757 arch_do_signal+0x33/0x610 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:135 [inline] exit_to_user_mode_prepare+0x8d/0x1b0 kernel/entry/common.c:166 syscall_exit_to_user_mode+0x5e/0x1a0 kernel/entry/common.c:241 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d4d9 Code: Bad RIP value. RSP: 002b:00007ffb3c4f1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: 00000000000000e4 RBX: 00000000000269c0 RCX: 000000000045d4d9 RDX: 04000000000000e4 RSI: 0000000020002ec0 RDI: 0000000000000006 RBP: 000000000118cf90 R08: 00000000200001c0 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007fff13f8bd7f R14: 00007ffb3c4f29c0 R15: 000000000118cf4c Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..