[ 69.838661][ T27] audit: type=1800 audit(1564104184.517:27): pid=10004 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 69.893412][ T27] audit: type=1800 audit(1564104184.637:28): pid=10004 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. [ 70.751336][ T27] audit: type=1800 audit(1564104185.487:29): pid=10004 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 [ 70.775659][ T27] audit: type=1800 audit(1564104185.497:30): pid=10004 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 '10.128.0.20' (ECDSA) to the list of known hosts. syzkaller login: [ 158.499343][T10160] IPVS: ftp: loaded support on port[0] = 21 [ 158.542472][T10160] chnl_net:caif_netlink_parms(): no params data found [ 158.563239][T10160] bridge0: port 1(bridge_slave_0) entered blocking state [ 158.570310][T10160] bridge0: port 1(bridge_slave_0) entered disabled state [ 158.577863][T10160] device bridge_slave_0 entered promiscuous mode [ 158.585176][T10160] bridge0: port 2(bridge_slave_1) entered blocking state [ 158.592284][T10160] bridge0: port 2(bridge_slave_1) entered disabled state [ 158.599869][T10160] device bridge_slave_1 entered promiscuous mode [ 158.613682][T10160] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 158.623833][T10160] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 158.638958][T10160] team0: Port device team_slave_0 added [ 158.645332][T10160] team0: Port device team_slave_1 added [ 158.722910][T10160] device hsr_slave_0 entered promiscuous mode [ 158.801494][T10160] device hsr_slave_1 entered promiscuous mode [ 158.886686][T10160] bridge0: port 2(bridge_slave_1) entered blocking state [ 158.893804][T10160] bridge0: port 2(bridge_slave_1) entered forwarding state [ 158.901086][T10160] bridge0: port 1(bridge_slave_0) entered blocking state [ 158.908179][T10160] bridge0: port 1(bridge_slave_0) entered forwarding state [ 158.933710][T10160] 8021q: adding VLAN 0 to HW filter on device bond0 [ 158.943862][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 158.952277][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 158.960607][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 158.968954][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 158.979191][T10160] 8021q: adding VLAN 0 to HW filter on device team0 [ 158.998966][T10160] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 159.009455][T10160] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 159.022012][T10164] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 159.030288][T10164] bridge0: port 1(bridge_slave_0) entered blocking state [ 159.037372][T10164] bridge0: port 1(bridge_slave_0) entered forwarding state [ 159.044875][T10164] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 159.053479][T10164] bridge0: port 2(bridge_slave_1) entered blocking state [ 159.060581][T10164] bridge0: port 2(bridge_slave_1) entered forwarding state [ 159.068489][T10164] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 159.076992][T10164] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 159.085281][T10164] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 159.093462][T10164] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 159.101764][T10164] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 159.109232][T10164] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 159.123886][T10160] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 159.152057][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 264.311211][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 264.317881][ C1] rcu: 1-....: (1 GPs behind) idle=c0a/1/0x4000000000000002 softirq=11627/11628 fqs=5250 [ 264.327847][ C1] (t=10500 jiffies g=10477 q=33) [ 264.332849][ C1] NMI backtrace for cpu 1 [ 264.337187][ C1] CPU: 1 PID: 10160 Comm: syz-executor291 Not tainted 5.3.0-rc1-next-20190725 #52 [ 264.346384][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 264.356423][ C1] Call Trace: [ 264.359688][ C1] [ 264.362571][ C1] dump_stack+0x172/0x1f0 [ 264.366905][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 264.372101][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 264.378336][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 264.383957][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 264.389924][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 264.395910][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 264.401009][ C1] ? find_next_bit+0x107/0x130 [ 264.405797][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 264.411330][ C1] ? raise_softirq+0x138/0x340 [ 264.416085][ C1] update_process_times+0x32/0x80 [ 264.421139][ C1] tick_sched_handle+0xa2/0x190 [ 264.425982][ C1] tick_sched_timer+0x53/0x140 [ 264.430744][ C1] __hrtimer_run_queues+0x364/0xe40 [ 264.435943][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 264.441235][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 264.446785][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 264.452536][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 264.458608][ C1] hrtimer_interrupt+0x314/0x770 [ 264.463548][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 264.469095][ C1] apic_timer_interrupt+0xf/0x20 [ 264.474707][ C1] RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x9f0 [ 264.481845][ C1] Code: 00 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 37 07 00 00 48 81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 f3 90 73 ff ff ff 8b 45 98 4c 8d 65 d8 3d 00 01 00 00 0f 84 e5 00 00 [ 264.501446][ C1] RSP: 0018:ffff8880ae909210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 264.510068][ C1] RAX: 0000000000000000 RBX: ffff88809338ad08 RCX: ffffffff81599777 [ 264.518042][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88809338ad08 [ 264.526362][ C1] RBP: ffff8880ae9092d0 R08: 1ffff110126715a1 R09: ffffed10126715a2 [ 264.534372][ C1] R10: ffffed10126715a1 R11: ffff88809338ad0b R12: 0000000000000001 [ 264.542422][ C1] R13: 0000000000000003 R14: ffffed10126715a1 R15: 0000000000000001 [ 264.550448][ C1] ? apic_timer_interrupt+0xa/0x20 [ 264.555558][ C1] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 264.562115][ C1] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 264.568470][ C1] ? mark_held_locks+0xf0/0xf0 [ 264.573318][ C1] do_raw_spin_lock+0x20e/0x2e0 [ 264.578313][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 264.583528][ C1] ? lock_acquire+0x190/0x410 [ 264.588372][ C1] ? release_sock+0x20/0x1c0 [ 264.593129][ C1] ? __kasan_check_read+0x11/0x20 [ 264.598152][ C1] _raw_spin_lock_bh+0x3b/0x50 [ 264.602975][ C1] ? release_sock+0x20/0x1c0 [ 264.607557][ C1] release_sock+0x20/0x1c0 [ 264.612087][ C1] wait_on_pending_writer+0x20f/0x420 [ 264.617639][ C1] ? ip6_rcv_finish+0x1de/0x2f0 [ 264.622625][ C1] ? tls_init+0x560/0x560 [ 264.626952][ C1] ? process_backlog+0x206/0x750 [ 264.632178][ C1] ? net_rx_action+0x508/0x10c0 [ 264.637205][ C1] ? __do_softirq+0x262/0x98c [ 264.641896][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 264.647804][ C1] ? inet_release+0xed/0x200 [ 264.652545][ C1] ? inet6_release+0x53/0x80 [ 264.657309][ C1] ? __sock_release+0xce/0x280 [ 264.662417][ C1] ? sock_close+0x1e/0x30 [ 264.666872][ C1] ? __fput+0x2ff/0x890 [ 264.671246][ C1] ? ____fput+0x16/0x20 [ 264.675417][ C1] ? task_work_run+0x145/0x1c0 [ 264.680428][ C1] ? exit_to_usermode_loop+0x316/0x380 [ 264.686173][ C1] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 264.691611][ C1] ? wait_on_pending_writer+0x420/0x420 [ 264.697241][ C1] tls_sk_proto_unhash+0x90/0x3f0 [ 264.702497][ C1] tcp_set_state+0x5b9/0x7d0 [ 264.707164][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 264.713877][ C1] ? __sk_mem_reduce_allocated+0x190/0x560 [ 264.719683][ C1] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 264.725557][ C1] ? __sk_mem_reclaim+0x55/0x70 [ 264.730750][ C1] ? tcp_write_queue_purge+0x5d8/0x1310 [ 264.736294][ C1] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 264.741581][ C1] tcp_done+0xe2/0x320 [ 264.745648][ C1] tcp_reset+0x132/0x500 [ 264.749885][ C1] tcp_validate_incoming+0xa2d/0x1660 [ 264.755402][ C1] tcp_rcv_established+0x6b5/0x1e70 [ 264.767859][ C1] ? mark_held_locks+0xf0/0xf0 [ 264.772994][ C1] ? sk_filter_trim_cap+0x45f/0xb30 [ 264.778187][ C1] ? tcp_data_queue+0x4860/0x4860 [ 264.783516][ C1] ? do_raw_spin_lock+0x12a/0x2e0 [ 264.788686][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 264.793817][ C1] ? lock_acquire+0x190/0x410 [ 264.798758][ C1] tcp_v6_do_rcv+0x41e/0x12c0 [ 264.803430][ C1] tcp_v6_rcv+0x31f1/0x3500 [ 264.807932][ C1] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 264.813709][ C1] ? nf_confirm+0x360/0x4d0 [ 264.818334][ C1] ? mark_held_locks+0xf0/0xf0 [ 264.823232][ C1] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 264.828865][ C1] ip6_input_finish+0x84/0x170 [ 264.833733][ C1] ip6_input+0xe4/0x3f0 [ 264.837883][ C1] ? ip6_input_finish+0x170/0x170 [ 264.843141][ C1] ? __kasan_check_read+0x11/0x20 [ 264.848295][ C1] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 264.854211][ C1] ? lock_downgrade+0x920/0x920 [ 264.859339][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 264.865759][ C1] ip6_rcv_finish+0x1de/0x2f0 [ 264.870494][ C1] ipv6_rcv+0x10e/0x420 [ 264.874798][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 264.880316][ C1] ? lock_downgrade+0x920/0x920 [ 264.885165][ C1] ? lock_downgrade+0x920/0x920 [ 264.890015][ C1] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 264.895905][ C1] ? trace_hardirqs_off+0x62/0x240 [ 264.901150][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 264.906783][ C1] __netif_receive_skb_one_core+0x113/0x1a0 [ 264.912672][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 264.918885][ C1] ? lock_acquire+0x190/0x410 [ 264.923556][ C1] ? process_backlog+0x195/0x750 [ 264.928922][ C1] __netif_receive_skb+0x2c/0x1d0 [ 264.933943][ C1] process_backlog+0x206/0x750 [ 264.938789][ C1] ? lock_acquire+0x190/0x410 [ 264.943550][ C1] ? clockevents_program_event+0x15a/0x370 [ 264.949568][ C1] net_rx_action+0x508/0x10c0 [ 264.954243][ C1] ? napi_complete_done+0x4b0/0x4b0 [ 264.959975][ C1] ? sched_clock+0x2e/0x50 [ 264.964396][ C1] ? kvm_clock_read+0x18/0x30 [ 264.969301][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 264.974818][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 264.981289][ C1] __do_softirq+0x262/0x98c [ 264.986468][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 264.992010][ C1] do_softirq_own_stack+0x2a/0x40 [ 264.997020][ C1] [ 264.999956][ C1] do_softirq.part.0+0x11a/0x170 [ 265.005101][ C1] __local_bh_enable_ip+0x211/0x270 [ 265.010293][ C1] inet_csk_listen_stop+0x1e0/0x850 [ 265.015641][ C1] tcp_close+0xd5b/0x10e0 [ 265.020105][ C1] ? ip_mc_drop_socket+0x211/0x270 [ 265.025375][ C1] ? down_write+0xdf/0x150 [ 265.029919][ C1] inet_release+0xed/0x200 [ 265.034334][ C1] inet6_release+0x53/0x80 [ 265.051533][ C1] __sock_release+0xce/0x280 [ 265.056222][ C1] sock_close+0x1e/0x30 [ 265.060819][ C1] __fput+0x2ff/0x890 [ 265.065196][ C1] ? __sock_release+0x280/0x280 [ 265.070162][ C1] ____fput+0x16/0x20 [ 265.074168][ C1] task_work_run+0x145/0x1c0 [ 265.079372][ C1] exit_to_usermode_loop+0x316/0x380 [ 265.084811][ C1] do_syscall_64+0x65f/0x760 [ 265.089832][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 265.096196][ C1] RIP: 0033:0x406571 [ 265.100134][ C1] 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 [ 265.120609][ C1] RSP: 002b:00007ffc1a1a5e00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 265.129171][ C1] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 265.137613][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 265.145818][ C1] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 265.154066][ C1] R10: 00007ffc1a1a5e30 R11: 0000000000000293 R12: 00007ffc1a1a5e60 [ 265.162278][ C1] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007 [ 265.741350][T10165] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-... } 10620 jiffies s: 105 root: 0x2/. [ 265.754223][T10165] rcu: blocking rcu_node structures: [ 265.759535][T10165] Task dump for CPU 1: [ 265.764402][T10165] syz-executor291 R running task 23952 10160 10159 0x8000000a [ 265.773362][T10165] Call Trace: [ 265.776696][T10165] ? __kasan_check_read+0x11/0x20 [ 265.782007][T10165] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 265.788863][T10165] ? lock_downgrade+0x920/0x920 [ 265.794752][T10165] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 265.801173][T10165] ? __this_cpu_preempt_check+0x3a/0x210 [ 265.807523][T10165] ? inet_csk_listen_stop+0x1bc/0x850 [ 265.813907][T10165] ? ksoftirqd_running+0x16/0x70 [ 265.818871][T10165] ? inet_csk_listen_stop+0x1bc/0x850 [ 265.824641][T10165] ? do_softirq.part.0+0x11a/0x170 [ 265.829922][T10165] ? __local_bh_enable_ip+0x211/0x270 [ 265.836464][T10165] ? inet_csk_listen_stop+0x1e0/0x850 [ 265.842600][T10165] ? tcp_close+0xd5b/0x10e0 [ 265.847163][T10165] ? ip_mc_drop_socket+0x211/0x270 [ 265.853283][T10165] ? down_write+0xdf/0x150 [ 265.859295][T10165] ? inet_release+0xed/0x200 [ 265.864262][T10165] ? inet6_release+0x53/0x80 [ 265.873869][T10165] ? __sock_release+0xce/0x280 [ 265.878753][T10165] ? sock_close+0x1e/0x30 [ 265.883497][T10165] ? __fput+0x2ff/0x890 [ 265.887818][T10165] ? __sock_release+0x280/0x280 [ 265.894248][T10165] ? ____fput+0x16/0x20 [ 265.898727][T10165] ? task_work_run+0x145/0x1c0 [ 265.903932][T10165] ? exit_to_usermode_loop+0x316/0x380 [ 265.909513][T10165] ? do_syscall_64+0x65f/0x760 [ 265.915189][T10165] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe