watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor.0:10433] Modules linked in: irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [] copy_process+0x1815/0x6b00 kernel/fork.c:1968 softirqs last enabled at (0): [] copy_process+0x18bc/0x6b00 kernel/fork.c:1971 softirqs last disabled at (0): [<0000000000000000>] 0x0 CPU: 0 PID: 10433 Comm: syz-executor.0 Not tainted 5.3.0-rc2-next-20190730 #55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__kasan_check_read+0x0/0x20 mm/kasan/common.c:91 Code: e8 89 c3 ae ff 0f 0b 4c 8b 4d d0 e9 27 ee ff ff 48 8b 73 58 89 c2 48 c7 c7 e0 ae 89 88 f7 da e8 6a c3 ae ff e9 da ee ff ff 90 <55> 89 f6 31 d2 48 89 e5 48 8b 4d 08 e8 cf 26 00 00 5d c3 0f 1f 00 RSP: 0018:ffff8880ae809b40 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88804328f1c8 RCX: ffffffff8158f237 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88804328f1c8 RBP: ffff8880ae809c08 R08: 1ffff11008651e39 R09: ffffed1008651e3a R10: ffffed1008651e39 R11: ffff88804328f1cb R12: 0000000000000001 R13: 0000000000000003 R14: ffffed1008651e39 R15: 0000000000000001 FS: 000055555594b940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f89ff7a6000 CR3: 0000000098acc000 CR4: 00000000001426f0 Call Trace: pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:642 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline] queued_spin_lock include/asm-generic/qspinlock.h:81 [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:151 spin_lock include/linux/spinlock.h:338 [inline] tcp_write_timer+0x2b/0x1e0 net/ipv4/tcp_timer.c:610 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x697/0x17a0 kernel/time/timer.c:1698 __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:1095 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:828 RIP: 0010:write_comp_data+0x1e/0x70 kernel/kcov.c:123 Code: 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65 4c 8b 04 25 40 fe 01 00 65 8b 05 88 e1 8f 7e a9 00 01 1f 00 75 51 41 8b 80 f8 12 00 00 <83> f8 03 75 45 49 8b 80 00 13 00 00 45 8b 80 fc 12 00 00 4c 8b 08 RSP: 0018:ffff888091eb7a88 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81442e24 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff888091eb7a90 R08: ffff8880989c4040 R09: fffffbfff1181219 R10: fffffbfff1181218 R11: ffffffff88c090c3 R12: 0000000040000005 R13: ffff888091eb7cbc R14: ffff888047280380 R15: ffff888091eb7cb8 wait_task_stopped kernel/exit.c:1227 [inline] wait_consider_task+0x444/0x38a0 kernel/exit.c:1431 do_wait_thread kernel/exit.c:1457 [inline] do_wait+0x452/0xa10 kernel/exit.c:1528 kernel_wait4+0x171/0x290 kernel/exit.c:1697 __do_sys_wait4+0x147/0x160 kernel/exit.c:1709 __se_sys_wait4 kernel/exit.c:1705 [inline] __x64_sys_wait4+0x97/0xf0 kernel/exit.c:1705 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4137ba Code: 0f 83 6a 18 00 00 c3 66 0f 1f 84 00 00 00 00 00 8b 05 de 2a 66 00 85 c0 75 36 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 d4 ff ff ff f7 RSP: 002b:00007ffff7cddaf8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 00000000000ddcf0 RCX: 00000000004137ba RDX: 0000000040000001 RSI: 00007ffff7cddb30 RDI: ffffffffffffffff RBP: 0000000000001150 R08: 0000000000000001 R09: 000055555594b940 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000b R13: 00007ffff7cddb30 R14: 00000000000dd9ca R15: 00007ffff7cddb40 Sending NMI from CPU 0 to CPUs 1: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.399 msecs NMI backtrace for cpu 1 CPU: 1 PID: 22623 Comm: syz-executor.0 Not tainted 5.3.0-rc2-next-20190730 #55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:atomic_read include/asm-generic/atomic-instrumented.h:26 [inline] RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:83 [inline] RIP: 0010:native_queued_spin_lock_slowpath+0xaa/0x9f0 kernel/locking/qspinlock.c:325 Code: 0f 1f 44 00 00 49 89 fe 49 89 fd 41 bc 01 00 00 00 49 c1 ee 03 41 83 e5 07 48 b8 00 00 00 00 00 fc ff df 49 01 c6 41 83 c5 03 04 00 00 00 48 89 df e8 99 f5 53 00 41 0f b6 06 41 38 c5 7c 08 RSP: 0018:ffff8880ae909210 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff88804328f1c8 RCX: ffffffff8158f237 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88804328f1c8 RBP: ffff8880ae9092d0 R08: 1ffff11008651e39 R09: ffffed1008651e3a R10: ffffed1008651e39 R11: ffff88804328f1cb R12: 0000000000000001 R13: 0000000000000003 R14: ffffed1008651e39 R15: 0000000000000001 FS: 000055555594b940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fc27000 CR3: 00000000a7b44000 CR4: 00000000001426e0 Call Trace: pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:642 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline] queued_spin_lock include/asm-generic/qspinlock.h:81 [inline] do_raw_spin_lock+0x20e/0x2e0 kernel/locking/spinlock_debug.c:113 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0x3b/0x50 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] release_sock+0x20/0x1c0 net/core/sock.c:2932 wait_on_pending_writer+0x20f/0x420 net/tls/tls_main.c:91 tls_sk_proto_cleanup+0x2c5/0x3e0 net/tls/tls_main.c:295 tls_sk_proto_unhash+0x90/0x3f0 net/tls/tls_main.c:330 tcp_set_state+0x5b9/0x7d0 net/ipv4/tcp.c:2235 tcp_done+0xe2/0x320 net/ipv4/tcp.c:3824 tcp_reset+0x132/0x500 net/ipv4/tcp_input.c:4080 tcp_validate_incoming+0xa2d/0x1660 net/ipv4/tcp_input.c:5440 tcp_rcv_established+0x6b5/0x1e70 net/ipv4/tcp_input.c:5648 tcp_v6_do_rcv+0x41e/0x12c0 net/ipv6/tcp_ipv6.c:1356 tcp_v6_rcv+0x31f1/0x3500 net/ipv6/tcp_ipv6.c:1588 ip6_protocol_deliver_rcu+0x2fe/0x1660 net/ipv6/ip6_input.c:397 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:438 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:447 dst_input include/net/dst.h:442 [inline] ip6_rcv_finish+0x1de/0x2f0 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:272 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4999 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5113 process_backlog+0x206/0x750 net/core/dev.c:5924 napi_poll net/core/dev.c:6347 [inline] net_rx_action+0x508/0x10c0 net/core/dev.c:6413 __do_softirq+0x262/0x98c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1080 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:337 do_softirq kernel/softirq.c:329 [inline] __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] inet_csk_listen_stop+0x1e0/0x850 net/ipv4/inet_connection_sock.c:993 tcp_close+0xd5b/0x10e0 net/ipv4/tcp.c:2338 inet_release+0xed/0x200 net/ipv4/af_inet.c:427 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:470 __sock_release+0xce/0x280 net/socket.c:590 sock_close+0x1e/0x30 net/socket.c:1268 __fput+0x2ff/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x145/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x316/0x380 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x65f/0x760 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x413511 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffff7cdd940 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000413511 RDX: 0000000000000000 RSI: 0000000000000b00 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000008b7eb00 R09: 0000000008b7eb04 R10: 00007ffff7cdda20 R11: 0000000000000293 R12: 000000000075c9a0 R13: 000000000075c9a0 R14: 0000000000761098 R15: ffffffffffffffff