[ 72.986036][ T26] audit: type=1800 audit(1564154432.990:27): pid=10067 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 73.027889][ T26] audit: type=1800 audit(1564154433.080:28): pid=10067 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. [ 73.858660][ T26] audit: type=1800 audit(1564154433.920:29): pid=10067 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 [ 73.881352][ T26] audit: type=1800 audit(1564154433.940:30): pid=10067 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 '10.128.0.182' (ECDSA) to the list of known hosts. syzkaller login: [ 188.647623][T10222] IPVS: ftp: loaded support on port[0] = 21 [ 188.692411][T10222] chnl_net:caif_netlink_parms(): no params data found [ 188.715444][T10222] bridge0: port 1(bridge_slave_0) entered blocking state [ 188.722802][T10222] bridge0: port 1(bridge_slave_0) entered disabled state [ 188.730396][T10222] device bridge_slave_0 entered promiscuous mode [ 188.737698][T10222] bridge0: port 2(bridge_slave_1) entered blocking state [ 188.744879][T10222] bridge0: port 2(bridge_slave_1) entered disabled state [ 188.752464][T10222] device bridge_slave_1 entered promiscuous mode [ 188.767489][T10222] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 188.779067][T10222] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 188.795886][T10222] team0: Port device team_slave_0 added [ 188.803123][T10222] team0: Port device team_slave_1 added [ 188.850391][T10222] device hsr_slave_0 entered promiscuous mode [ 188.888865][T10222] device hsr_slave_1 entered promiscuous mode [ 188.954758][T10222] bridge0: port 2(bridge_slave_1) entered blocking state [ 188.961915][T10222] bridge0: port 2(bridge_slave_1) entered forwarding state [ 188.969295][T10222] bridge0: port 1(bridge_slave_0) entered blocking state [ 188.976361][T10222] bridge0: port 1(bridge_slave_0) entered forwarding state [ 189.004127][T10222] 8021q: adding VLAN 0 to HW filter on device bond0 [ 189.015362][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 189.033975][ T22] bridge0: port 1(bridge_slave_0) entered disabled state [ 189.042484][ T22] bridge0: port 2(bridge_slave_1) entered disabled state [ 189.050951][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 189.061300][T10222] 8021q: adding VLAN 0 to HW filter on device team0 [ 189.071128][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 189.079501][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 189.086542][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 189.099051][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 189.107462][ T22] bridge0: port 2(bridge_slave_1) entered blocking state [ 189.114593][ T22] bridge0: port 2(bridge_slave_1) entered forwarding state [ 189.127335][ T3016] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 189.136713][ T3016] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 189.151800][T10222] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 189.162323][T10222] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 189.174228][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 189.183319][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 189.191790][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 189.200264][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 189.214453][T10222] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 189.247005][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 294.408398][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 294.415146][ C0] rcu: 0-...!: (3 GPs behind) idle=d5e/1/0x4000000000000002 softirq=10182/10182 fqs=3 [ 294.424851][ C0] (t=10501 jiffies g=10925 q=9) [ 294.429782][ C0] rcu: rcu_preempt kthread starved for 10496 jiffies! g10925 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 294.440952][ C0] rcu: RCU grace-period kthread stack dump: [ 294.446826][ C0] rcu_preempt R running task 29120 10 2 0x80004000 [ 294.454724][ C0] Call Trace: [ 294.458041][ C0] __schedule+0x755/0x15b0 [ 294.462467][ C0] ? __sched_text_start+0x8/0x8 [ 294.467331][ C0] schedule+0xa8/0x270 [ 294.471426][ C0] schedule_timeout+0x486/0xc50 [ 294.476274][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 294.481205][ C0] ? usleep_range+0x170/0x170 [ 294.485873][ C0] ? trace_hardirqs_on+0x67/0x240 [ 294.490887][ C0] ? __kasan_check_read+0x11/0x20 [ 294.495911][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 294.501455][ C0] ? swake_up_one+0x60/0x60 [ 294.505955][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 294.510716][ C0] ? rcu_barrier+0x310/0x310 [ 294.515303][ C0] ? trace_hardirqs_on+0x67/0x240 [ 294.520332][ C0] ? __kasan_check_read+0x11/0x20 [ 294.525349][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 294.531577][ C0] ? __kthread_parkme+0x108/0x1c0 [ 294.536592][ C0] ? __kasan_check_read+0x11/0x20 [ 294.541606][ C0] kthread+0x361/0x430 [ 294.545683][ C0] ? rcu_barrier+0x310/0x310 [ 294.550285][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 294.556526][ C0] ret_from_fork+0x24/0x30 [ 294.560941][ C0] NMI backtrace for cpu 0 [ 294.565275][ C0] CPU: 0 PID: 10222 Comm: syz-executor252 Not tainted 5.3.0-rc1-next-20190726 #53 [ 294.574453][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 294.584495][ C0] Call Trace: [ 294.587769][ C0] [ 294.590689][ C0] dump_stack+0x172/0x1f0 [ 294.595017][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 294.600219][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 294.606461][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 294.612088][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 294.618061][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 294.623963][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 294.629087][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 294.634625][ C0] ? raise_softirq+0x138/0x340 [ 294.639382][ C0] update_process_times+0x32/0x80 [ 294.644400][ C0] tick_sched_handle+0xa2/0x190 [ 294.649243][ C0] tick_sched_timer+0x53/0x140 [ 294.654003][ C0] __hrtimer_run_queues+0x364/0xe40 [ 294.659197][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 294.664476][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 294.670015][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 294.675723][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 294.681782][ C0] hrtimer_interrupt+0x314/0x770 [ 294.686722][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 294.692259][ C0] apic_timer_interrupt+0xf/0x20 [ 294.697193][ C0] RIP: 0010:native_queued_spin_lock_slowpath+0xaa/0x9f0 [ 294.704123][ C0] 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 89 70 53 00 41 0f b6 06 41 38 c5 7c 08 [ 294.726583][ C0] RSP: 0018:ffff8880ae809210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 294.735037][ C0] RAX: 0000000000000000 RBX: ffff8880a90bad48 RCX: ffffffff8159a3d7 [ 294.742994][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a90bad48 [ 294.750957][ C0] RBP: ffff8880ae8092d0 R08: 1ffff110152175a9 R09: ffffed10152175aa [ 294.758918][ C0] R10: ffffed10152175a9 R11: ffff8880a90bad4b R12: 0000000000000001 [ 294.766879][ C0] R13: 0000000000000003 R14: ffffed10152175a9 R15: 0000000000000001 [ 294.774855][ C0] ? apic_timer_interrupt+0xa/0x20 [ 294.779967][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 294.786295][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 294.792530][ C0] ? mark_held_locks+0xf0/0xf0 [ 294.797305][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 294.802148][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 294.807073][ C0] ? lock_acquire+0x190/0x410 [ 294.811783][ C0] ? release_sock+0x20/0x1c0 [ 294.816369][ C0] ? __kasan_check_read+0x11/0x20 [ 294.821391][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 294.826146][ C0] ? release_sock+0x20/0x1c0 [ 294.830725][ C0] release_sock+0x20/0x1c0 [ 294.835189][ C0] wait_on_pending_writer+0x20f/0x420 [ 294.840581][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 294.845424][ C0] ? tls_init+0x560/0x560 [ 294.849773][ C0] ? process_backlog+0x206/0x750 [ 294.854703][ C0] ? net_rx_action+0x508/0x10c0 [ 294.859545][ C0] ? __do_softirq+0x262/0x98c [ 294.864215][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 294.870334][ C0] ? inet_release+0xed/0x200 [ 294.874943][ C0] ? inet6_release+0x53/0x80 [ 294.879552][ C0] ? __sock_release+0xce/0x280 [ 294.884311][ C0] ? sock_close+0x1e/0x30 [ 294.888634][ C0] ? __fput+0x2ff/0x890 [ 294.892777][ C0] ? ____fput+0x16/0x20 [ 294.896919][ C0] ? task_work_run+0x145/0x1c0 [ 294.901674][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 294.907128][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 294.912324][ C0] ? wait_on_pending_writer+0x420/0x420 [ 294.917866][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 294.922920][ C0] tcp_set_state+0x5b9/0x7d0 [ 294.927506][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 294.933739][ C0] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 294.939537][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 294.944983][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 294.949822][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 294.955452][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 294.960771][ C0] tcp_done+0xe2/0x320 [ 294.964869][ C0] tcp_reset+0x132/0x500 [ 294.969101][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 294.974465][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 294.979657][ C0] ? mark_held_locks+0xf0/0xf0 [ 294.984455][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 294.989651][ C0] ? tcp_data_queue+0x4860/0x4860 [ 294.994665][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 294.999683][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 295.004607][ C0] ? lock_acquire+0x190/0x410 [ 295.009306][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 295.013978][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 295.018494][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 295.024108][ C0] ? nf_confirm+0x360/0x4d0 [ 295.028608][ C0] ? mark_held_locks+0xf0/0xf0 [ 295.033366][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 295.038997][ C0] ip6_input_finish+0x84/0x170 [ 295.043749][ C0] ip6_input+0xe4/0x3f0 [ 295.047891][ C0] ? ip6_input_finish+0x170/0x170 [ 295.052908][ C0] ? __kasan_check_read+0x11/0x20 [ 295.057945][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 295.063832][ C0] ? lock_downgrade+0x920/0x920 [ 295.068677][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 295.074906][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 295.079573][ C0] ipv6_rcv+0x10e/0x420 [ 295.083721][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 295.089173][ C0] ? lock_downgrade+0x920/0x920 [ 295.094015][ C0] ? lock_downgrade+0x920/0x920 [ 295.098867][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 295.104757][ C0] ? trace_hardirqs_off+0x62/0x240 [ 295.109862][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 295.115327][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 295.121220][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 295.127103][ C0] ? lock_acquire+0x190/0x410 [ 295.131789][ C0] ? process_backlog+0x195/0x750 [ 295.136753][ C0] __netif_receive_skb+0x2c/0x1d0 [ 295.141776][ C0] process_backlog+0x206/0x750 [ 295.146530][ C0] ? lock_acquire+0x190/0x410 [ 295.151208][ C0] ? clockevents_program_event+0x15a/0x370 [ 295.157005][ C0] net_rx_action+0x508/0x10c0 [ 295.161676][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 295.166861][ C0] ? sched_clock+0x2e/0x50 [ 295.171266][ C0] ? kvm_clock_read+0x18/0x30 [ 295.175940][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 295.181309][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 295.187588][ C0] __do_softirq+0x262/0x98c [ 295.192090][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 295.197451][ C0] do_softirq_own_stack+0x2a/0x40 [ 295.202455][ C0] [ 295.205384][ C0] do_softirq.part.0+0x11a/0x170 [ 295.210318][ C0] __local_bh_enable_ip+0x211/0x270 [ 295.215508][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 295.220721][ C0] tcp_close+0xd5b/0x10e0 [ 295.225057][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 295.230173][ C0] ? down_write+0xdf/0x150 [ 295.234613][ C0] inet_release+0xed/0x200 [ 295.239027][ C0] inet6_release+0x53/0x80 [ 295.243455][ C0] __sock_release+0xce/0x280 [ 295.248036][ C0] sock_close+0x1e/0x30 [ 295.252185][ C0] __fput+0x2ff/0x890 [ 295.256159][ C0] ? __sock_release+0x280/0x280 [ 295.261001][ C0] ____fput+0x16/0x20 [ 295.264968][ C0] task_work_run+0x145/0x1c0 [ 295.269557][ C0] exit_to_usermode_loop+0x316/0x380 [ 295.274921][ C0] do_syscall_64+0x65f/0x760 [ 295.279507][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 295.285388][ C0] RIP: 0033:0x406571 [ 295.289275][ 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 [ 295.308874][ C0] RSP: 002b:00007ffe95a836b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 295.317272][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 295.325239][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 295.333198][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 295.341157][ C0] R10: 00007ffe95a836e0 R11: 0000000000000293 R12: 00007ffe95a83710 [ 295.349129][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007