rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ WARNING: CPU: 0 PID: 10673 at kernel/sched/core.c:3013 rq_unlock kernel/sched/sched.h:1326 [inline] WARNING: CPU: 0 PID: 10673 at kernel/sched/core.c:3013 try_invoke_on_locked_down_task+0x21d/0x2f0 kernel/sched/core.c:3019 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 10673 Comm: syz-executor.4 Not tainted 5.9.0-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+0x198/0x1fd lib/dump_stack.c:118 panic+0x382/0x7fb kernel/panic.c:231 __warn.cold+0x20/0x4b kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 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+0x21d/0x2f0 kernel/sched/core.c:3013 Code: 45 31 f6 49 39 c0 74 3a 8b 74 24 38 49 8d 78 18 4c 89 04 24 e8 a4 e7 08 00 4c 8b 04 24 4c 89 c7 e8 b8 09 d7 06 e9 20 ff ff ff <0f> 0b e9 7d fe ff ff 4c 89 ee 48 89 ef 41 ff d4 41 89 c6 e9 08 ff RSP: 0018:ffffc900000077c0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 1ffff92000000efa RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8162da90 RDI: ffff8880362ce000 RBP: ffff8880362ce000 R08: 0000000000000033 R09: ffffffff8a05ad83 R10: 0000000000001cad R11: 0000000000000001 R12: ffffffff8162da90 R13: ffffc900000078e8 R14: ffff8880362ce000 R15: 0000000000000000 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:3639 [inline] rcu_sched_clock_irq.cold+0x97e/0xdfd kernel/rcu/tree.c:2521 update_process_times+0x25/0xa0 kernel/time/timer.c:1710 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328 __run_hrtimer kernel/time/hrtimer.c:1524 [inline] __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1588 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x147/0x5f0 arch/x86/kernel/apic/apic.c:1097 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0x4c/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x4d/0x90 kernel/locking/spinlock.c:191 Code: 48 c7 c0 68 6b fc 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 3c 48 83 3d 92 21 d3 01 00 74 29 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 c4 ab 27 f9 65 8b 05 8d b4 d8 77 RSP: 0018:ffffc90000007ca8 EFLAGS: 00000286 RAX: 1ffffffff13f8d6d RBX: 0000000000000286 RCX: ffffffff815b7f72 RDX: dffffc0000000000 RSI: 0000000000000101 RDI: 0000000000000286 RBP: ffff8880613b3908 R08: 0000000000000001 R09: ffffffff8d0c3aaf R10: fffffbfff1a18755 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880613b3908 R14: 1ffff92000000fa7 R15: ffff8880ae4255c0 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] skb_dequeue+0x125/0x180 net/core/skbuff.c:3042 mrp_queue_xmit net/802/mrp.c:350 [inline] mrp_join_timer+0x97/0xc0 net/802/mrp.c:595 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413 expire_timers kernel/time/timer.c:1458 [inline] __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755 __run_timers kernel/time/timer.c:1736 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1768 __do_softirq+0x1f8/0xb23 kernel/softirq.c:298 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+0x9b/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x235/0x280 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:__sanitizer_cov_trace_pc+0x52/0x60 kernel/kcov.c:205 Code: 74 2b 8b 82 08 14 00 00 83 f8 02 75 20 48 8b 8a 10 14 00 00 8b 92 0c 14 00 00 48 8b 01 48 83 c0 01 48 39 c2 76 07 48 89 34 c1 <48> 89 01 c3 66 2e 0f 1f 84 00 00 00 00 00 41 55 41 54 49 89 fc 55 RSP: 0018:ffffc9001754f3e8 EFLAGS: 00000212 RAX: 000000000000d069 RBX: 0000000000000004 RCX: ffffc90011230000 RDX: 0000000000040000 RSI: ffffffff838a1b1a RDI: 0000000000000005 RBP: ffff88809e4f1480 R08: 0000000000000001 R09: ffffffff8d5faa07 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000149 R14: dffffc0000000000 R15: 0000000000000000 tomoyo_domain_quota_is_ok+0x31a/0x550 security/tomoyo/util.c:1070 tomoyo_supervisor+0x2f2/0xef0 security/tomoyo/common.c:2089 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline] tomoyo_path_number_perm+0x419/0x590 security/tomoyo/file.c:734 tomoyo_path_mknod+0x10d/0x190 security/tomoyo/tomoyo.c:240 security_path_mknod+0xf9/0x170 security/security.c:1077 may_o_create fs/namei.c:2927 [inline] lookup_open.isra.0+0x431/0x1350 fs/namei.c:3068 open_last_lookups fs/namei.c:3177 [inline] path_openat+0x96d/0x2730 fs/namei.c:3365 do_filp_open+0x17e/0x3c0 fs/namei.c:3395 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45de59 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f39e2924c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000022140 RCX: 000000000045de59 RDX: 0000000000000000 RSI: 0000000000164142 RDI: 0000000020000100 RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 000000000169fb7f R14: 00007f39e29259c0 R15: 000000000118bf2c Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..