rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10500 ticks this GP) idle=9ca/1/0x4000000000000004 softirq=168213/168213 fqs=5177 rcu: (t=10502 jiffies g=232869 q=2114) NMI backtrace for cpu 1 CPU: 1 PID: 25416 Comm: syz-executor.3 Not tainted 4.19.105-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+0x5f2/0xdbb 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:168 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1278 __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:call_timer_fn+0x1db/0x720 kernel/time/timer.c:1329 Code: 3f 0f 87 16 04 00 00 e8 e3 bc 0f 00 89 db 48 0f a3 1d f1 0c 72 08 0f 92 c3 31 ff 89 de e8 0d be 0f 00 84 db 0f 85 f9 02 00 00 c0 bc 0f 00 48 8b bd 40 ff ff ff be 01 00 00 00 48 c7 c2 fb 1f RSP: 0018:ffff8880ae907d18 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000100 RBX: 0000000000000000 RCX: ffffffff815b2350 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff8880ae907dd8 R08: ffff88805253c600 R09: ffffed1015d24733 R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000000100 R13: ffff8880ae907db0 R14: 1ffff11015d20fa6 R15: 0000000000000000 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:544 [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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:kmem_cache_free+0xab/0x260 mm/slab.c:3766 Code: e8 ea 31 00 00 84 c0 74 77 41 f7 c5 00 02 00 00 74 4f e8 68 d6 cd ff 48 83 3d c8 14 50 07 00 0f 84 ab 01 00 00 4c 89 ef 57 9d <0f> 1f 44 00 00 4c 8b 6d 08 0f 1f 44 00 00 65 8b 05 50 3f 5f 7e 83 RSP: 0018:ffff8880429f7a90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff8880a169ede0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffff8880429f7ab0 R08: ffff88805253c600 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880aa459b40 R13: 0000000000000286 R14: ffffffff832821ea R15: ffff8880429f7c78 ebitmap_destroy+0x7a/0xf0 security/selinux/ss/ebitmap.c:338 mls_context_destroy security/selinux/ss/context.h:109 [inline] context_destroy security/selinux/ss/context.h:148 [inline] security_compute_sid.part.0+0xbd5/0x15c0 security/selinux/ss/services.c:1803 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:1375 __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: 0033:0x45c449 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:00007efd01af1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007efd01af26d4 RCX: 000000000045c449 RDX: 0000000000000006 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000b61 R14: 00000000004cd55b R15: 000000000076bf2c