rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=5ba/1/0x4000000000000004 softirq=204187/204195 fqs=1 (t=10501 jiffies g=238541 q=185) NMI backtrace for cpu 0 CPU: 0 PID: 18865 Comm: syz-executor.0 Not tainted 5.5.0-rc7-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+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+0x509/0xc0d 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: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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x4f/0x80 kernel/locking/spinlock.c:199 Code: c0 a8 33 93 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 72 06 bf 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 47 5d 7c f9 65 8b 05 38 f1 2d 78 85 c0 74 06 41 RSP: 0018:ffffc90000007dd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1326675 RBX: ffffffff863af880 RCX: 0000000000000003 RDX: dffffc0000000000 RSI: ffff888046a4cf28 RDI: ffff888046a4ced4 RBP: ffffc90000007dd8 R08: 1ffffffff165e5cc R09: fffffbfff165e5cd R10: fffffbfff165e5cc R11: ffffffff8b2f2e67 R12: ffff8880ae827240 R13: ffff88803a46b418 R14: ffff8880ae827240 R15: dffffc0000000000 expire_timers kernel/time/timer.c:1448 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6b1/0x1790 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 RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x1a/0x20 kernel/kcov.c:262 Code: 8b 4d 08 e8 18 ff ff ff 5d c3 66 0f 1f 44 00 00 55 40 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 48 89 e5 48 8b 4d 08 e8 f6 fe ff ff <5d> c3 0f 1f 40 00 55 0f b7 d6 0f b7 f7 bf 03 00 00 00 48 89 e5 48 RSP: 0018:ffffc900038ced60 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffffffff836478a5 RDX: 0000000000000010 RSI: 0000000000000010 RDI: 0000000000000001 RBP: ffffc900038ced60 R08: ffff888046a4c640 R09: fffff52000719dc3 R10: fffff52000719dc2 R11: 0000000000000000 R12: ffff888096e84680 R13: 0000000000000002 R14: 00000000000002b9 R15: 0000000000000000 tomoyo_domain_quota_is_ok+0x335/0x540 security/tomoyo/util.c:1070 tomoyo_supervisor+0x2e8/0xef0 security/tomoyo/common.c:2089 tomoyo_audit_net_log security/tomoyo/network.c:367 [inline] tomoyo_audit_inet_log+0x26a/0x340 security/tomoyo/network.c:393 tomoyo_inet_entry security/tomoyo/network.c:484 [inline] tomoyo_check_inet_address security/tomoyo/network.c:532 [inline] tomoyo_check_inet_address+0x62a/0x730 security/tomoyo/network.c:501 tomoyo_socket_sendmsg_permission+0x2d5/0x3cb security/tomoyo/network.c:774 tomoyo_socket_sendmsg+0x26/0x30 security/tomoyo/tomoyo.c:486 security_socket_sendmsg+0x77/0xc0 security/security.c:2013 sock_sendmsg+0x45/0x130 net/socket.c:656 kernel_sendmsg+0x44/0x50 net/socket.c:679 rxrpc_send_data_packet+0x10cb/0x36b0 net/rxrpc/output.c:416 rxrpc_queue_packet net/rxrpc/sendmsg.c:220 [inline] rxrpc_send_data+0x1097/0x4130 net/rxrpc/sendmsg.c:427 rxrpc_do_sendmsg+0xb8e/0x1d5f net/rxrpc/sendmsg.c:736 rxrpc_sendmsg+0x4d6/0x5f0 net/rxrpc/af_rxrpc.c:585 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:659 ____sys_sendmsg+0x358/0x880 net/socket.c:2330 ___sys_sendmsg+0x100/0x170 net/socket.c:2384 __sys_sendmmsg+0x1bf/0x4d0 net/socket.c:2474 __do_sys_sendmmsg net/socket.c:2503 [inline] __se_sys_sendmmsg net/socket.c:2500 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2500 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b349 Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fdf2eb21c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fdf2eb226d4 RCX: 000000000045b349 RDX: 0000000000000001 RSI: 0000000020005c00 RDI: 0000000000000009 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000008ca R14: 00000000004ca1f6 R15: 000000000075bf2c