[ 68.960764][ T26] audit: type=1800 audit(1564335000.722:27): pid=10152 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 68.981152][ T26] audit: type=1800 audit(1564335000.722:28): pid=10152 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 69.694770][ T26] audit: type=1800 audit(1564335001.512:29): pid=10152 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 69.720044][ T26] audit: type=1800 audit(1564335001.512:30): pid=10152 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.112' (ECDSA) to the list of known hosts. syzkaller login: [ 193.164433][T10305] IPVS: ftp: loaded support on port[0] = 21 [ 193.207768][T10305] chnl_net:caif_netlink_parms(): no params data found [ 193.228541][T10305] bridge0: port 1(bridge_slave_0) entered blocking state [ 193.235850][T10305] bridge0: port 1(bridge_slave_0) entered disabled state [ 193.243466][T10305] device bridge_slave_0 entered promiscuous mode [ 193.250608][T10305] bridge0: port 2(bridge_slave_1) entered blocking state [ 193.257810][T10305] bridge0: port 2(bridge_slave_1) entered disabled state [ 193.265313][T10305] device bridge_slave_1 entered promiscuous mode [ 193.278446][T10305] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 193.288316][T10305] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 193.303570][T10305] team0: Port device team_slave_0 added [ 193.310175][T10305] team0: Port device team_slave_1 added [ 193.371456][T10305] device hsr_slave_0 entered promiscuous mode [ 193.410326][T10305] device hsr_slave_1 entered promiscuous mode [ 193.455425][T10305] bridge0: port 2(bridge_slave_1) entered blocking state [ 193.462551][T10305] bridge0: port 2(bridge_slave_1) entered forwarding state [ 193.469861][T10305] bridge0: port 1(bridge_slave_0) entered blocking state [ 193.477128][T10305] bridge0: port 1(bridge_slave_0) entered forwarding state [ 193.502472][T10305] 8021q: adding VLAN 0 to HW filter on device bond0 [ 193.514385][ T3015] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 193.533147][ T3015] bridge0: port 1(bridge_slave_0) entered disabled state [ 193.540968][ T3015] bridge0: port 2(bridge_slave_1) entered disabled state [ 193.548662][ T3015] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 193.559171][T10305] 8021q: adding VLAN 0 to HW filter on device team0 [ 193.568322][ T2851] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 193.576631][ T2851] bridge0: port 1(bridge_slave_0) entered blocking state [ 193.583693][ T2851] bridge0: port 1(bridge_slave_0) entered forwarding state [ 193.593521][ T3015] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 193.602109][ T3015] bridge0: port 2(bridge_slave_1) entered blocking state [ 193.609155][ T3015] bridge0: port 2(bridge_slave_1) entered forwarding state [ 193.623757][T10309] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 193.632185][T10309] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 193.642583][ T3015] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 193.654804][T10305] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 193.665457][T10305] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 193.676936][T10309] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 193.685445][T10309] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 193.693801][T10309] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 193.708562][T10305] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 193.739617][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 298.899884][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 298.906620][ C0] rcu: 0-...!: (1 GPs behind) idle=32e/1/0x4000000000000002 softirq=10017/10018 fqs=2 [ 298.916322][ C0] (t=10501 jiffies g=10213 q=3) [ 298.921265][ C0] rcu: rcu_preempt kthread starved for 10498 jiffies! g10213 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 298.932431][ C0] rcu: RCU grace-period kthread stack dump: [ 298.938415][ C0] rcu_preempt R running task 29528 10 2 0x80004000 [ 298.946307][ C0] Call Trace: [ 298.949599][ C0] __schedule+0x755/0x15b0 [ 298.954016][ C0] ? __sched_text_start+0x8/0x8 [ 298.958860][ C0] schedule+0xa8/0x270 [ 298.962923][ C0] schedule_timeout+0x486/0xc50 [ 298.967767][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 298.972696][ C0] ? usleep_range+0x170/0x170 [ 298.977377][ C0] ? trace_hardirqs_on+0x67/0x240 [ 298.982392][ C0] ? __kasan_check_read+0x11/0x20 [ 298.987436][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 298.992983][ C0] ? swake_up_one+0x60/0x60 [ 298.997485][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 299.002247][ C0] ? rcu_barrier+0x310/0x310 [ 299.006826][ C0] ? trace_hardirqs_on+0x67/0x240 [ 299.011855][ C0] ? __kasan_check_read+0x11/0x20 [ 299.016887][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 299.023293][ C0] ? __kthread_parkme+0x108/0x1c0 [ 299.028304][ C0] ? __kasan_check_read+0x11/0x20 [ 299.033347][ C0] kthread+0x361/0x430 [ 299.037418][ C0] ? rcu_barrier+0x310/0x310 [ 299.041996][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 299.048230][ C0] ret_from_fork+0x24/0x30 [ 299.052647][ C0] NMI backtrace for cpu 0 [ 299.056979][ C0] CPU: 0 PID: 10305 Comm: syz-executor237 Not tainted 5.3.0-rc1-next-20190726 #53 [ 299.066170][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 299.076211][ C0] Call Trace: [ 299.079483][ C0] [ 299.082333][ C0] dump_stack+0x172/0x1f0 [ 299.086686][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 299.091881][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 299.098199][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 299.103832][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 299.109807][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 299.115717][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 299.120829][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 299.126366][ C0] ? raise_softirq+0x138/0x340 [ 299.131123][ C0] update_process_times+0x32/0x80 [ 299.136137][ C0] tick_sched_handle+0xa2/0x190 [ 299.140978][ C0] tick_sched_timer+0x53/0x140 [ 299.145747][ C0] __hrtimer_run_queues+0x364/0xe40 [ 299.150936][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 299.156213][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 299.161753][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 299.167472][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 299.173530][ C0] hrtimer_interrupt+0x314/0x770 [ 299.178474][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 299.184013][ C0] apic_timer_interrupt+0xf/0x20 [ 299.188962][ C0] RIP: 0010:__kasan_check_read+0x0/0x20 [ 299.194516][ C0] Code: e8 99 48 af ff 0f 0b 4c 8b 4d d0 e9 27 ee ff ff 48 8b 73 58 89 c2 48 c7 c7 c8 a9 89 88 f7 da e8 7a 48 af 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 [ 299.214116][ C0] RSP: 0018:ffff8880ae809208 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 299.222525][ C0] RAX: 0000000000000000 RBX: ffff8880a8f32108 RCX: ffffffff8159a3d7 [ 299.230502][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a8f32108 [ 299.238478][ C0] RBP: ffff8880ae8092d0 R08: 1ffff110151e6421 R09: ffffed10151e6422 [ 299.246437][ C0] R10: ffffed10151e6421 R11: ffff8880a8f3210b R12: 0000000000000001 [ 299.254401][ C0] R13: 0000000000000003 R14: ffffed10151e6421 R15: 0000000000000001 [ 299.262379][ C0] ? apic_timer_interrupt+0xa/0x20 [ 299.267486][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 299.273829][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 299.280176][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 299.286428][ C0] ? mark_held_locks+0xf0/0xf0 [ 299.291190][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 299.296035][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 299.300988][ C0] ? lock_acquire+0x190/0x410 [ 299.305653][ C0] ? release_sock+0x20/0x1c0 [ 299.310258][ C0] ? __kasan_check_read+0x11/0x20 [ 299.315291][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 299.320063][ C0] ? release_sock+0x20/0x1c0 [ 299.324641][ C0] release_sock+0x20/0x1c0 [ 299.329070][ C0] wait_on_pending_writer+0x20f/0x420 [ 299.334433][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 299.339322][ C0] ? tls_init+0x560/0x560 [ 299.343658][ C0] ? process_backlog+0x206/0x750 [ 299.348594][ C0] ? net_rx_action+0x508/0x10c0 [ 299.353436][ C0] ? __do_softirq+0x262/0x98c [ 299.358118][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 299.363937][ C0] ? inet_release+0xed/0x200 [ 299.368519][ C0] ? inet6_release+0x53/0x80 [ 299.373097][ C0] ? __sock_release+0xce/0x280 [ 299.377846][ C0] ? sock_close+0x1e/0x30 [ 299.382183][ C0] ? __fput+0x2ff/0x890 [ 299.386323][ C0] ? ____fput+0x16/0x20 [ 299.390480][ C0] ? task_work_run+0x145/0x1c0 [ 299.395234][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 299.400688][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 299.405882][ C0] ? wait_on_pending_writer+0x420/0x420 [ 299.411423][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 299.416441][ C0] tcp_set_state+0x5b9/0x7d0 [ 299.421035][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 299.427267][ C0] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 299.433063][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 299.438510][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 299.443350][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 299.448889][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 299.454164][ C0] tcp_done+0xe2/0x320 [ 299.458223][ C0] tcp_reset+0x132/0x500 [ 299.462455][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 299.467823][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 299.473013][ C0] ? mark_held_locks+0xf0/0xf0 [ 299.478283][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 299.483475][ C0] ? tcp_data_queue+0x4860/0x4860 [ 299.488490][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 299.493516][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 299.498445][ C0] ? lock_acquire+0x190/0x410 [ 299.503121][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 299.507879][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 299.512388][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 299.517925][ C0] ? nf_confirm+0x360/0x4d0 [ 299.522424][ C0] ? mark_held_locks+0xf0/0xf0 [ 299.527179][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 299.532811][ C0] ip6_input_finish+0x84/0x170 [ 299.537564][ C0] ip6_input+0xe4/0x3f0 [ 299.541720][ C0] ? ip6_input_finish+0x170/0x170 [ 299.546736][ C0] ? __kasan_check_read+0x11/0x20 [ 299.551759][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 299.557645][ C0] ? lock_downgrade+0x920/0x920 [ 299.562503][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 299.568736][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 299.573404][ C0] ipv6_rcv+0x10e/0x420 [ 299.577548][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 299.583762][ C0] ? lock_downgrade+0x920/0x920 [ 299.588627][ C0] ? lock_downgrade+0x920/0x920 [ 299.593499][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 299.599391][ C0] ? trace_hardirqs_off+0x62/0x240 [ 299.604491][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 299.609944][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 299.615842][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 299.621732][ C0] ? lock_acquire+0x190/0x410 [ 299.626399][ C0] ? process_backlog+0x195/0x750 [ 299.631326][ C0] __netif_receive_skb+0x2c/0x1d0 [ 299.636339][ C0] process_backlog+0x206/0x750 [ 299.641094][ C0] ? lock_acquire+0x190/0x410 [ 299.645759][ C0] ? clockevents_program_event+0x15a/0x370 [ 299.651558][ C0] net_rx_action+0x508/0x10c0 [ 299.656226][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 299.661432][ C0] ? sched_clock+0x2e/0x50 [ 299.665837][ C0] ? kvm_clock_read+0x18/0x30 [ 299.670515][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 299.675898][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 299.682134][ C0] __do_softirq+0x262/0x98c [ 299.686631][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 299.691994][ C0] do_softirq_own_stack+0x2a/0x40 [ 299.696997][ C0] [ 299.699924][ C0] do_softirq.part.0+0x11a/0x170 [ 299.704850][ C0] __local_bh_enable_ip+0x211/0x270 [ 299.710057][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 299.715262][ C0] tcp_close+0xd5b/0x10e0 [ 299.719581][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 299.724678][ C0] ? down_write+0xdf/0x150 [ 299.729083][ C0] inet_release+0xed/0x200 [ 299.733491][ C0] inet6_release+0x53/0x80 [ 299.737897][ C0] __sock_release+0xce/0x280 [ 299.742476][ C0] sock_close+0x1e/0x30 [ 299.746618][ C0] __fput+0x2ff/0x890 [ 299.750591][ C0] ? __sock_release+0x280/0x280 [ 299.755433][ C0] ____fput+0x16/0x20 [ 299.759402][ C0] task_work_run+0x145/0x1c0 [ 299.763987][ C0] exit_to_usermode_loop+0x316/0x380 [ 299.769259][ C0] do_syscall_64+0x65f/0x760 [ 299.773859][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 299.779826][ C0] RIP: 0033:0x406571 [ 299.783717][ C0] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 24 1a 00 00 c3 48 83 ec 08 e8 6a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 b3 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 299.803339][ C0] RSP: 002b:00007fff18784160 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 299.811741][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 299.819744][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 299.827702][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 299.835671][ C0] R10: 00007fff18784190 R11: 0000000000000293 R12: 00007fff187841c0 [ 299.843627][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007