rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=0ca/1/0x4000000000000004 softirq=322398/322401 fqs=5192 rcu: (t=10500 jiffies g=448789 q=1685) NMI backtrace for cpu 1 CPU: 1 PID: 11197 Comm: syz-executor.5 Not tainted 4.19.95-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+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 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+0x189/0x1d5 kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x5e3/0xd90 kernel/rcu/tree.c:2682 update_process_times+0x32/0x80 kernel/time/timer.c:1638 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:184 Code: 48 c7 c0 c8 5b f2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d ea 6e 9c 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 8c f3 f2 f9 65 8b 05 d5 00 ac 78 RSP: 0018:ffff8880ae907bc8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e4b79 RBX: 0000000000000286 RCX: 1ffff11007c0e9d9 RDX: dffffc0000000000 RSI: ffff88803e074ea8 RDI: 0000000000000286 RBP: ffff8880ae907bd8 R08: ffff88803e074600 R09: ffff88803e074ec8 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae923a00 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880ae923a00 __mod_timer kernel/time/timer.c:1059 [inline] mod_timer+0x571/0x1030 kernel/time/timer.c:1102 garp_join_timer_arm+0x5e/0x80 net/802/garp.c:401 garp_join_timer+0x73/0x80 net/802/garp.c:414 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:101 Code: 90 90 90 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 f8 d7 96 7e 81 e2 00 01 1f 00 75 2b 8b 90 d0 12 00 00 <83> fa 02 75 20 48 8b 88 d8 12 00 00 8b 80 d4 12 00 00 48 8b 11 48 RSP: 0018:ffff88820db27ae0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88803e074600 RBX: ffff888099bd7580 RCX: ffffc900108db000 RDX: 0000000000000002 RSI: ffffffff832a846f RDI: ffff888099bd75d0 RBP: ffff88820db27ae0 R08: ffff88803e074600 R09: fffffbfff15b6ef3 R10: fffffbfff15b6ef2 R11: ffffffff8adb7793 R12: dffffc0000000000 R13: 0000000000000005 R14: 0000000000000006 R15: ffff88820db27c78 security_compute_sid.part.0+0x96f/0x15c0 security/selinux/ss/services.c:1773 security_compute_sid security/selinux/ss/services.c:1825 [inline] security_transition_sid+0x126/0x190 security/selinux/ss/services.c:1825 socket_sockcreate_sid security/selinux/hooks.c:4558 [inline] socket_sockcreate_sid security/selinux/hooks.c:4550 [inline] selinux_socket_create+0x44c/0x610 security/selinux/hooks.c:4592 security_socket_create+0x7b/0xc0 security/security.c:1379 __sock_create+0x90/0x730 net/socket.c:1231 sock_create net/socket.c:1316 [inline] __sys_socket+0x103/0x220 net/socket.c:1346 __do_sys_socket net/socket.c:1355 [inline] __se_sys_socket net/socket.c:1353 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1353 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45af49 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:00007fb86e4ccc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49 RDX: 0000000000000007 RSI: 0000000000000003 RDI: 000000000000000a RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb86e4cd6d4 R13: 00000000004cb934 R14: 00000000004e6290 R15: 00000000ffffffff