[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.875457][ T26] audit: type=1800 audit(1563987219.260:25): pid=9039 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.904160][ T26] audit: type=1800 audit(1563987219.260:26): pid=9039 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.951822][ T26] audit: type=1800 audit(1563987219.260:27): pid=9039 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.206' (ECDSA) to the list of known hosts. syzkaller login: [ 73.739033][ T9194] IPVS: ftp: loaded support on port[0] = 21 [ 73.796190][ T9194] chnl_net:caif_netlink_parms(): no params data found [ 73.827506][ T9194] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.835268][ T9194] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.843352][ T9194] device bridge_slave_0 entered promiscuous mode [ 73.851778][ T9194] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.858917][ T9194] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.866956][ T9194] device bridge_slave_1 entered promiscuous mode [ 73.885064][ T9194] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.896370][ T9194] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.916809][ T9194] team0: Port device team_slave_0 added [ 73.924030][ T9194] team0: Port device team_slave_1 added [ 74.003648][ T9194] device hsr_slave_0 entered promiscuous mode [ 74.072241][ T9194] device hsr_slave_1 entered promiscuous mode [ 74.139693][ T9194] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.146928][ T9194] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.154805][ T9194] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.161937][ T9194] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.196255][ T9194] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.210163][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.220178][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.229090][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.237166][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.249555][ T9194] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.260295][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.268986][ T22] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.282579][ T22] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.302111][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.310499][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.317756][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.326382][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.335872][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.347889][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.360119][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.372248][ T9194] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 74.384835][ T9194] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.394400][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 74.411023][ T9194] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.451858][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 74.623858][ C0] BUG: spinlock recursion on CPU#0, syz-executor688/9194 [ 74.630945][ C0] lock: 0xffff88808a544d48, .magic: dead4ead, .owner: syz-executor688/9194, .owner_cpu: 0 [ 74.641073][ C0] CPU: 0 PID: 9194 Comm: syz-executor688 Not tainted 5.3.0-rc1-next-20190724 #50 [ 74.650209][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.660276][ C0] Call Trace: [ 74.663569][ C0] [ 74.666428][ C0] dump_stack+0x172/0x1f0 [ 74.670744][ C0] spin_dump.cold+0x81/0xe6 [ 74.675259][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.681516][ C0] do_raw_spin_lock+0x252/0x2e0 [ 74.686492][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 74.691782][ C0] ? lock_acquire+0x190/0x410 [ 74.696448][ C0] ? release_sock+0x20/0x1c0 [ 74.701141][ C0] ? __kasan_check_read+0x11/0x20 [ 74.706243][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 74.711016][ C0] ? release_sock+0x20/0x1c0 [ 74.715606][ C0] release_sock+0x20/0x1c0 [ 74.720010][ C0] wait_on_pending_writer+0x20f/0x420 [ 74.725411][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 74.730337][ C0] ? tls_init+0x560/0x560 [ 74.734658][ C0] ? process_backlog+0x206/0x750 [ 74.739607][ C0] ? net_rx_action+0x508/0x10c0 [ 74.744459][ C0] ? __do_softirq+0x262/0x98c [ 74.749137][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 74.755031][ C0] ? inet_release+0xed/0x200 [ 74.759611][ C0] ? inet6_release+0x53/0x80 [ 74.764185][ C0] ? __sock_release+0xce/0x280 [ 74.768933][ C0] ? sock_close+0x1e/0x30 [ 74.773264][ C0] ? __fput+0x2ff/0x890 [ 74.777408][ C0] ? ____fput+0x16/0x20 [ 74.788318][ C0] ? task_work_run+0x145/0x1c0 [ 74.798529][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 74.804634][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 74.809842][ C0] ? wait_on_pending_writer+0x420/0x420 [ 74.815399][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 74.820416][ C0] ? kfree_skbmem+0xa5/0x150 [ 74.825028][ C0] tcp_set_state+0x5b9/0x7d0 [ 74.829611][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 74.835840][ C0] ? __sk_mem_reduce_allocated+0x190/0x560 [ 74.841645][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 74.847417][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 74.852281][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 74.857817][ C0] tcp_done+0xe2/0x320 [ 74.861868][ C0] tcp_reset+0x132/0x500 [ 74.866118][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 74.871502][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 74.876702][ C0] ? mark_held_locks+0xf0/0xf0 [ 74.881448][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 74.886639][ C0] ? tcp_data_queue+0x4860/0x4860 [ 74.891658][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 74.896681][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 74.901715][ C0] ? lock_acquire+0x190/0x410 [ 74.906376][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 74.911062][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 74.915557][ C0] ? __kasan_check_read+0x11/0x20 [ 74.920563][ C0] ? mark_lock+0x98/0x11e0 [ 74.924973][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 74.930519][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 74.936150][ C0] ip6_input_finish+0x84/0x170 [ 74.941236][ C0] ip6_input+0xe4/0x3f0 [ 74.945388][ C0] ? ip6_input_finish+0x170/0x170 [ 74.950403][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 74.956285][ C0] ? lock_downgrade+0x920/0x920 [ 74.961140][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 74.967549][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 74.972221][ C0] ipv6_rcv+0x10e/0x420 [ 74.976378][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 74.981825][ C0] ? __kasan_check_read+0x11/0x20 [ 74.986854][ C0] ? mark_lock+0xc0/0x11e0 [ 74.991258][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 74.997160][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 75.002717][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 75.008612][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 75.014500][ C0] ? lock_acquire+0x190/0x410 [ 75.019166][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.025386][ C0] __netif_receive_skb+0x2c/0x1d0 [ 75.030392][ C0] process_backlog+0x206/0x750 [ 75.035231][ C0] ? net_rx_action+0x27b/0x10c0 [ 75.040083][ C0] ? lockdep_hardirqs_on+0x19e/0x5d0 [ 75.045354][ C0] net_rx_action+0x508/0x10c0 [ 75.050017][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 75.055221][ C0] __do_softirq+0x262/0x98c [ 75.059713][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 75.065063][ C0] do_softirq_own_stack+0x2a/0x40 [ 75.070231][ C0] [ 75.073157][ C0] do_softirq.part.0+0x11a/0x170 [ 75.078079][ C0] __local_bh_enable_ip+0x211/0x270 [ 75.083349][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 75.088543][ C0] tcp_close+0xd5b/0x10e0 [ 75.092859][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 75.097958][ C0] ? down_write+0xdf/0x150 [ 75.102383][ C0] inet_release+0xed/0x200 [ 75.107051][ C0] inet6_release+0x53/0x80 [ 75.111491][ C0] __sock_release+0xce/0x280 [ 75.116081][ C0] sock_close+0x1e/0x30 [ 75.121966][ C0] __fput+0x2ff/0x890 [ 75.125941][ C0] ? __sock_release+0x280/0x280 [ 75.130803][ C0] ____fput+0x16/0x20 [ 75.134773][ C0] task_work_run+0x145/0x1c0 [ 75.139574][ C0] exit_to_usermode_loop+0x316/0x380 [ 75.145300][ C0] do_syscall_64+0x65f/0x760 [ 75.149885][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.156084][ C0] RIP: 0033:0x406591 [ 75.159968][ 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 [ 75.187045][ C0] RSP: 002b:00007ffd9082def0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 75.195443][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406591 [ 75.203437][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 75.214963][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 75.222929][ C0] R10: 00007ffd9082df20 R11: 0000000000000293 R12: 00007ffd9082df50 [ 75.231119][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007