rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=186/1/0x4000000000000002 softirq=149028/149030 fqs=5248 rcu: (t=10502 jiffies g=211533 q=2494) NMI backtrace for cpu 1 CPU: 1 PID: 5329 Comm: syz-executor.3 Not tainted 5.0.0+ #19 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 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.c:1223 print_cpu_stall kernel/rcu/tree.c:1360 [inline] check_cpu_stall kernel/rcu/tree.c:1434 [inline] rcu_pending kernel/rcu/tree.c:3103 [inline] rcu_sched_clock_irq.cold+0x500/0xa4a kernel/rcu/tree.c:2544 update_process_times+0x32/0x80 kernel/time/timer.c:1635 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:182 [inline] RIP: 0010:check_memory_region+0x56/0x190 mm/kasan/generic.c:191 Code: ff 49 89 f8 48 b8 00 00 00 00 00 fc ff df 4d 89 da 49 c1 e8 03 4d 8d 24 00 49 c1 ea 03 49 01 c2 4c 89 e0 49 8d 5a 01 49 89 d9 <4d> 29 e1 49 83 f9 10 0f 8e 99 00 00 00 45 89 e0 41 83 e0 07 75 56 RSP: 0018:ffff88808ba36f20 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: fffff91ffffae00c RBX: fffff91ffffae00d RCX: ffffffff81580f77 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffe8ffffd70060 RBP: ffff88808ba36f38 R08: 1ffffd1ffffae00c R09: fffff91ffffae00d R10: fffff91ffffae00c R11: ffffe8ffffd70063 R12: fffff91ffffae00c R13: 0000000000000003 R14: fffff91ffffae00c R15: 00000000000000bd kasan_check_read+0x11/0x20 mm/kasan/common.c:102 atomic_read include/asm-generic/atomic-instrumented.h:26 [inline] virt_spin_lock arch/x86/include/asm/qspinlock.h:83 [inline] native_queued_spin_lock_slowpath+0xb7/0x9f0 kernel/locking/qspinlock.c:334 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:654 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline] queued_spin_lock include/asm-generic/qspinlock.h:90 [inline] do_raw_spin_lock+0x20e/0x2e0 kernel/locking/spinlock_debug.c:113 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0x37/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] nf_ct_add_to_unconfirmed_list net/netfilter/nf_conntrack_core.c:487 [inline] init_conntrack.isra.0+0xa07/0x1170 net/netfilter/nf_conntrack_core.c:1478 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1519 [inline] nf_conntrack_in+0xd93/0x1410 net/netfilter/nf_conntrack_core.c:1679 ipv4_conntrack_local+0x169/0x210 net/netfilter/nf_conntrack_proto.c:200 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xbf/0x1f0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] __ip_local_out+0x403/0x880 net/ipv4/ip_output.c:113 ip_local_out+0x2d/0x1b0 net/ipv4/ip_output.c:122 __ip_queue_xmit+0x86f/0x1bf0 net/ipv4/ip_output.c:505 ip_queue_xmit+0x5a/0x70 include/net/ip.h:198 __tcp_transmit_skb+0x1a32/0x3750 net/ipv4/tcp_output.c:1159 tcp_transmit_skb net/ipv4/tcp_output.c:1175 [inline] tcp_send_syn_data net/ipv4/tcp_output.c:3498 [inline] tcp_connect+0x1e67/0x4330 net/ipv4/tcp_output.c:3537 tcp_v4_connect+0x1514/0x1c40 net/ipv4/tcp_ipv4.c:315 __inet_stream_connect+0x83f/0xea0 net/ipv4/af_inet.c:655 tcp_sendmsg_fastopen net/ipv4/tcp.c:1167 [inline] tcp_sendmsg_locked+0x2347/0x34b0 net/ipv4/tcp.c:1209 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1445 inet_sendmsg+0x147/0x5d0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:632 __sys_sendto+0x262/0x380 net/socket.c:1809 __do_sys_sendto net/socket.c:1821 [inline] __se_sys_sendto net/socket.c:1817 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1817 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457f29 Code: ad b8 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 b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2a9d1a7c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457f29 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000020000080 R09: 000000000000004f R10: 0000000020000000 R11: 0000000000000246 R12: 00007f2a9d1a86d4 R13: 00000000004c5651 R14: 00000000004d9588 R15: 00000000ffffffff