rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (10500 ticks this GP) idle=366/1/0x4000000000000004 softirq=181836/181836 fqs=86 rcu: (t=10500 jiffies g=289661 q=306) rcu: rcu_preempt kthread starved for 10300 jiffies! g289661 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29104 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1806 rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 NMI backtrace for cpu 0 CPU: 0 PID: 8570 Comm: syz-executor.1 Not tainted 4.19.102-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: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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 kernel/locking/spinlock.c:192 Code: c0 58 57 f2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 7d 51 9d 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 32 c9 f3 f9 65 8b 05 db e7 ac 78 85 c0 74 06 41 RSP: 0018:ffff8880ae807dd0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e4aeb RBX: ffff8880891f00d8 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffff888021730a80 RDI: ffff888021730a7c RBP: ffff8880ae807dd8 R08: ffff888021730200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae823a00 R13: dffffc0000000000 R14: ffffffff85d8c830 R15: ffff8880ae823a00 expire_timers kernel/time/timer.c:1362 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x644/0x16a0 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:compound_head include/linux/page-flags.h:145 [inline] RIP: 0010:virt_to_head_page include/linux/mm.h:655 [inline] RIP: 0010:qlink_to_cache mm/kasan/quarantine.c:127 [inline] RIP: 0010:qlist_free_all+0xe4/0x150 mm/kasan/quarantine.c:163 Code: ff 48 89 f7 48 89 75 d0 e8 99 a6 8e ff 48 8b 75 d0 48 b9 00 00 00 00 00 ea ff ff 48 c1 e8 0c 48 c1 e0 06 48 01 c8 48 8b 50 08 <48> 8d 4a ff 83 e2 01 48 0f 45 c1 4c 8b 78 18 e9 37 ff ff ff e8 f3 RSP: 0018:ffff88820d6efbc8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: ffffea0001061440 RBX: 0000000000000286 RCX: ffffea0000000000 RDX: ffffea0001061988 RSI: ffff888041851b00 RDI: 0000000000000007 RBP: ffff88820d6efbf8 R08: ffff888021730200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888041851b00 R14: ffff88820d6efc08 R15: 0000000000000000 quarantine_reduce+0x169/0x1a0 mm/kasan/quarantine.c:259 kasan_kmalloc+0xa0/0xf0 mm/kasan/kasan.c:538 kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:490 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x146/0x750 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] sk_prot_alloc+0x19c/0x2e0 net/core/sock.c:1466 sk_alloc+0x39/0xf70 net/core/sock.c:1520 pfkey_create+0x25a/0xa20 net/key/af_key.c:158 __sock_create+0x3d8/0x730 net/socket.c:1276 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: 0033:0x45b3b9 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:00007fe2df45cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007fe2df45d6d4 RCX: 000000000045b3b9 RDX: 0000000000000002 RSI: 0000000000000003 RDI: 000000000000000f RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000b53 R14: 00000000004cc3fd R15: 000000000075bf2c IPv6: ADDRCONF(NETDEV_UP): vlan1176: link is not ready