[ 70.636328][ T26] audit: type=1800 audit(1564251659.413:27): pid=10271 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 70.656910][ T26] audit: type=1800 audit(1564251659.413:28): pid=10271 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. [ 71.143266][ T26] audit: type=1800 audit(1564251659.993:29): pid=10271 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 [ 71.163545][ T26] audit: type=1800 audit(1564251659.993:30): pid=10271 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 '10.128.1.61' (ECDSA) to the list of known hosts. syzkaller login: [ 207.756460][T10424] IPVS: ftp: loaded support on port[0] = 21 [ 207.801632][T10424] chnl_net:caif_netlink_parms(): no params data found [ 207.825414][T10424] bridge0: port 1(bridge_slave_0) entered blocking state [ 207.832684][T10424] bridge0: port 1(bridge_slave_0) entered disabled state [ 207.840198][T10424] device bridge_slave_0 entered promiscuous mode [ 207.847699][T10424] bridge0: port 2(bridge_slave_1) entered blocking state [ 207.854872][T10424] bridge0: port 2(bridge_slave_1) entered disabled state [ 207.862511][T10424] device bridge_slave_1 entered promiscuous mode [ 207.878362][T10424] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 207.889052][T10424] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 207.906146][T10424] team0: Port device team_slave_0 added [ 207.913076][T10424] team0: Port device team_slave_1 added [ 207.993539][T10424] device hsr_slave_0 entered promiscuous mode [ 208.062260][T10424] device hsr_slave_1 entered promiscuous mode [ 208.127500][T10424] bridge0: port 2(bridge_slave_1) entered blocking state [ 208.134696][T10424] bridge0: port 2(bridge_slave_1) entered forwarding state [ 208.142227][T10424] bridge0: port 1(bridge_slave_0) entered blocking state [ 208.149483][T10424] bridge0: port 1(bridge_slave_0) entered forwarding state [ 208.176417][T10424] 8021q: adding VLAN 0 to HW filter on device bond0 [ 208.187850][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 208.206618][ T3014] bridge0: port 1(bridge_slave_0) entered disabled state [ 208.214616][ T3014] bridge0: port 2(bridge_slave_1) entered disabled state [ 208.222709][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 208.233107][T10424] 8021q: adding VLAN 0 to HW filter on device team0 [ 208.242887][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 208.251448][ T2817] bridge0: port 1(bridge_slave_0) entered blocking state [ 208.258589][ T2817] bridge0: port 1(bridge_slave_0) entered forwarding state [ 208.272756][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 208.281289][ T3014] bridge0: port 2(bridge_slave_1) entered blocking state [ 208.288414][ T3014] bridge0: port 2(bridge_slave_1) entered forwarding state [ 208.296723][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 208.306044][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 208.315870][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 208.329227][T10424] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 208.339985][T10424] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 208.351698][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 208.360696][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 208.369176][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 208.383417][T10424] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 208.413729][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 313.581766][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 313.588680][ C0] rcu: 0-....: (1 GPs behind) idle=6a2/1/0x4000000000000002 softirq=9787/9788 fqs=5250 [ 313.598491][ C0] (t=10502 jiffies g=10725 q=19) [ 313.603517][ C0] NMI backtrace for cpu 0 [ 313.607846][ C0] CPU: 0 PID: 10424 Comm: syz-executor741 Not tainted 5.3.0-rc1-next-20190726 #53 [ 313.617140][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 313.627202][ C0] Call Trace: [ 313.630483][ C0] [ 313.633467][ C0] dump_stack+0x172/0x1f0 [ 313.637815][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 313.643024][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 313.649287][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 313.654939][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 313.660933][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 313.666839][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 313.671963][ C0] ? find_next_bit+0x107/0x130 [ 313.676742][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 313.682303][ C0] ? raise_softirq+0x138/0x340 [ 313.687090][ C0] update_process_times+0x32/0x80 [ 313.692133][ C0] tick_sched_handle+0xa2/0x190 [ 313.697000][ C0] tick_sched_timer+0x53/0x140 [ 313.701783][ C0] __hrtimer_run_queues+0x364/0xe40 [ 313.706997][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 313.712317][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 313.717881][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 313.723614][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 313.729703][ C0] hrtimer_interrupt+0x314/0x770 [ 313.734741][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 313.740314][ C0] apic_timer_interrupt+0xf/0x20 [ 313.745268][ C0] RIP: 0010:check_memory_region+0x22/0x1a0 [ 313.751177][ C0] Code: 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 34 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 53 <0f> 86 07 01 00 00 4c 8d 5c 37 ff 49 89 f8 48 b8 00 00 00 00 00 fc [ 313.770787][ C0] RSP: 0018:ffff8880ae8091d8 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 [ 313.779211][ C0] RAX: ffff7fffffffffff RBX: ffff88808dbd8d48 RCX: ffffffff8159a3d7 [ 313.787198][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88808dbd8d48 [ 313.795187][ C0] RBP: ffff8880ae8091f0 R08: 1ffff11011b7b1a9 R09: ffffed1011b7b1aa [ 313.803172][ C0] R10: ffffed1011b7b1a9 R11: ffff88808dbd8d4b R12: 0000000000000001 [ 313.811152][ C0] R13: 0000000000000003 R14: ffffed1011b7b1a9 R15: 0000000000000001 [ 313.819152][ C0] ? apic_timer_interrupt+0xa/0x20 [ 313.824313][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 313.830662][ C0] __kasan_check_read+0x11/0x20 [ 313.835522][ C0] native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 313.841692][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 313.847950][ C0] ? mark_held_locks+0xf0/0xf0 [ 313.852728][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 313.857592][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 313.862546][ C0] ? lock_acquire+0x190/0x410 [ 313.867319][ C0] ? release_sock+0x20/0x1c0 [ 313.871922][ C0] ? __kasan_check_read+0x11/0x20 [ 313.876961][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 313.881725][ C0] ? release_sock+0x20/0x1c0 [ 313.886327][ C0] release_sock+0x20/0x1c0 [ 313.890857][ C0] wait_on_pending_writer+0x20f/0x420 [ 313.896315][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 313.901181][ C0] ? tls_init+0x560/0x560 [ 313.905591][ C0] ? process_backlog+0x206/0x750 [ 313.910548][ C0] ? net_rx_action+0x508/0x10c0 [ 313.915401][ C0] ? __do_softirq+0x262/0x98c [ 313.920097][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 313.926024][ C0] ? inet_release+0xed/0x200 [ 313.930648][ C0] ? inet6_release+0x53/0x80 [ 313.935269][ C0] ? __sock_release+0xce/0x280 [ 313.940044][ C0] ? sock_close+0x1e/0x30 [ 313.944377][ C0] ? __fput+0x2ff/0x890 [ 313.948535][ C0] ? ____fput+0x16/0x20 [ 313.952691][ C0] ? task_work_run+0x145/0x1c0 [ 313.957460][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 313.962939][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 313.968150][ C0] ? wait_on_pending_writer+0x420/0x420 [ 313.973717][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 313.978820][ C0] tcp_set_state+0x5b9/0x7d0 [ 313.983431][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 313.989683][ C0] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 313.995507][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 314.000986][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 314.005847][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 314.011492][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 314.016791][ C0] tcp_done+0xe2/0x320 [ 314.020865][ C0] tcp_reset+0x132/0x500 [ 314.025109][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 314.030496][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 314.035711][ C0] ? mark_held_locks+0xf0/0xf0 [ 314.040568][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 314.045787][ C0] ? tcp_data_queue+0x4860/0x4860 [ 314.050827][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 314.055865][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 314.060806][ C0] ? lock_acquire+0x190/0x410 [ 314.065488][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 314.070173][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 314.074692][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 314.080305][ C0] ? nf_confirm+0x360/0x4d0 [ 314.084822][ C0] ? mark_held_locks+0xf0/0xf0 [ 314.089594][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 314.095241][ C0] ip6_input_finish+0x84/0x170 [ 314.100011][ C0] ip6_input+0xe4/0x3f0 [ 314.104190][ C0] ? ip6_input_finish+0x170/0x170 [ 314.109223][ C0] ? __kasan_check_read+0x11/0x20 [ 314.114253][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 314.120154][ C0] ? lock_downgrade+0x920/0x920 [ 314.125010][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 314.131260][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 314.135949][ C0] ipv6_rcv+0x10e/0x420 [ 314.140117][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 314.145583][ C0] ? lock_downgrade+0x920/0x920 [ 314.150432][ C0] ? lock_downgrade+0x920/0x920 [ 314.155287][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 314.161186][ C0] ? trace_hardirqs_off+0x62/0x240 [ 314.166302][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 314.171831][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 314.177740][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 314.183642][ C0] ? lock_acquire+0x190/0x410 [ 314.188334][ C0] ? process_backlog+0x195/0x750 [ 314.193285][ C0] __netif_receive_skb+0x2c/0x1d0 [ 314.198358][ C0] process_backlog+0x206/0x750 [ 314.203126][ C0] ? lock_acquire+0x190/0x410 [ 314.207808][ C0] ? clockevents_program_event+0x15a/0x370 [ 314.213627][ C0] net_rx_action+0x508/0x10c0 [ 314.218323][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 314.223527][ C0] ? sched_clock+0x2e/0x50 [ 314.227953][ C0] ? kvm_clock_read+0x18/0x30 [ 314.232636][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 314.238022][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 314.244275][ C0] __do_softirq+0x262/0x98c [ 314.248792][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 314.254176][ C0] do_softirq_own_stack+0x2a/0x40 [ 314.259203][ C0] [ 314.262149][ C0] do_softirq.part.0+0x11a/0x170 [ 314.267176][ C0] __local_bh_enable_ip+0x211/0x270 [ 314.272375][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 314.277577][ C0] tcp_close+0xd5b/0x10e0 [ 314.281911][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 314.287019][ C0] ? down_write+0xdf/0x150 [ 314.291440][ C0] inet_release+0xed/0x200 [ 314.295863][ C0] inet6_release+0x53/0x80 [ 314.300286][ C0] __sock_release+0xce/0x280 [ 314.304968][ C0] sock_close+0x1e/0x30 [ 314.309122][ C0] __fput+0x2ff/0x890 [ 314.313104][ C0] ? __sock_release+0x280/0x280 [ 314.317951][ C0] ____fput+0x16/0x20 [ 314.321931][ C0] task_work_run+0x145/0x1c0 [ 314.326518][ C0] exit_to_usermode_loop+0x316/0x380 [ 314.331809][ C0] do_syscall_64+0x65f/0x760 [ 314.336410][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 314.342320][ C0] RIP: 0033:0x406581 [ 314.346237][ 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 [ 314.365943][ C0] RSP: 002b:00007ffcd3507850 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 314.374359][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406581 [ 314.382345][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 314.390331][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 314.398341][ C0] R10: 00007ffcd3507880 R11: 0000000000000293 R12: 00007ffcd35078b0 [ 314.406327][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007 [ 316.893936][ T17] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-... } 10810 jiffies s: 105 root: 0x1/. [ 316.905710][ T17] rcu: blocking rcu_node structures: [ 316.911020][ T17] Task dump for CPU 0: [ 316.915544][ T17] syz-executor741 R running task 24504 10424 10423 0x8000000a [ 316.923858][ T17] Call Trace: [ 316.927169][ T17] ? __kasan_check_read+0x11/0x20 [ 316.932578][ T17] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 316.938861][ T17] ? lock_downgrade+0x920/0x920 [ 316.944175][ T17] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 316.950449][ T17] ? __this_cpu_preempt_check+0x3a/0x210 [ 316.956487][ T17] ? inet_csk_listen_stop+0x1bc/0x850 [ 316.962309][ T17] ? ksoftirqd_running+0x16/0x70 [ 316.967288][ T17] ? inet_csk_listen_stop+0x1bc/0x850 [ 316.973068][ T17] ? do_softirq.part.0+0x11a/0x170 [ 316.978215][ T17] ? __local_bh_enable_ip+0x211/0x270 [ 316.984082][ T17] ? inet_csk_listen_stop+0x1e0/0x850 [ 316.989499][ T17] ? tcp_close+0xd5b/0x10e0 [ 316.994392][ T17] ? ip_mc_drop_socket+0x211/0x270 [ 316.999532][ T17] ? down_write+0xdf/0x150 [ 317.004484][ T17] ? inet_release+0xed/0x200 [ 317.009118][ T17] ? inet6_release+0x53/0x80 [ 317.014144][ T17] ? __sock_release+0xce/0x280 [ 317.018948][ T17] ? sock_close+0x1e/0x30 [ 317.023707][ T17] ? __fput+0x2ff/0x890 [ 317.027893][ T17] ? __sock_release+0x280/0x280 [ 317.033116][ T17] ? ____fput+0x16/0x20 [ 317.037301][ T17] ? task_work_run+0x145/0x1c0 [ 317.042470][ T17] ? exit_to_usermode_loop+0x316/0x380 [ 317.047964][ T17] ? do_syscall_64+0x65f/0x760 [ 317.053121][ T17] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe