[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.302072][ T26] audit: type=1800 audit(1563989032.352:25): pid=8964 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 62.337225][ T26] audit: type=1800 audit(1563989032.352:26): pid=8964 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.388588][ T26] audit: type=1800 audit(1563989032.362:27): pid=8964 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 '10.128.0.217' (ECDSA) to the list of known hosts. syzkaller login: [ 89.658405][ T9118] IPVS: ftp: loaded support on port[0] = 21 [ 89.715059][ T9118] chnl_net:caif_netlink_parms(): no params data found [ 89.744653][ T9118] bridge0: port 1(bridge_slave_0) entered blocking state [ 89.752436][ T9118] bridge0: port 1(bridge_slave_0) entered disabled state [ 89.760160][ T9118] device bridge_slave_0 entered promiscuous mode [ 89.768951][ T9118] bridge0: port 2(bridge_slave_1) entered blocking state [ 89.776041][ T9118] bridge0: port 2(bridge_slave_1) entered disabled state [ 89.784055][ T9118] device bridge_slave_1 entered promiscuous mode [ 89.801941][ T9118] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 89.812806][ T9118] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 89.833245][ T9118] team0: Port device team_slave_0 added [ 89.840584][ T9118] team0: Port device team_slave_1 added [ 89.889272][ T9118] device hsr_slave_0 entered promiscuous mode [ 89.957463][ T9118] device hsr_slave_1 entered promiscuous mode [ 90.045112][ T9118] bridge0: port 2(bridge_slave_1) entered blocking state [ 90.052354][ T9118] bridge0: port 2(bridge_slave_1) entered forwarding state [ 90.060138][ T9118] bridge0: port 1(bridge_slave_0) entered blocking state [ 90.067270][ T9118] bridge0: port 1(bridge_slave_0) entered forwarding state [ 90.102369][ T9118] 8021q: adding VLAN 0 to HW filter on device bond0 [ 90.114609][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 90.124496][ T22] bridge0: port 1(bridge_slave_0) entered disabled state [ 90.132894][ T22] bridge0: port 2(bridge_slave_1) entered disabled state [ 90.141900][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 90.153903][ T9118] 8021q: adding VLAN 0 to HW filter on device team0 [ 90.165306][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 90.174040][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 90.181158][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 90.197823][ T9121] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 90.206506][ T9121] bridge0: port 2(bridge_slave_1) entered blocking state [ 90.213720][ T9121] bridge0: port 2(bridge_slave_1) entered forwarding state [ 90.225200][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 90.235560][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 90.246345][ T9121] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 90.260194][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 90.271745][ T9118] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 90.284291][ T9118] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 90.292678][ T9121] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 90.310713][ T9118] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 90.347129][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 90.518459][ C1] BUG: spinlock recursion on CPU#1, syz-executor856/9118 [ 90.525611][ C1] lock: 0xffff88808b880108, .magic: dead4ead, .owner: syz-executor856/9118, .owner_cpu: 1 [ 90.535817][ C1] CPU: 1 PID: 9118 Comm: syz-executor856 Not tainted 5.3.0-rc1-next-20190724 #50 [ 90.545171][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 90.555653][ C1] Call Trace: [ 90.559024][ C1] [ 90.561870][ C1] dump_stack+0x172/0x1f0 [ 90.566187][ C1] spin_dump.cold+0x81/0xe6 [ 90.570684][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 90.576924][ C1] do_raw_spin_lock+0x252/0x2e0 [ 90.581770][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 90.586700][ C1] ? lock_acquire+0x190/0x410 [ 90.591368][ C1] ? release_sock+0x20/0x1c0 [ 90.595948][ C1] ? __kasan_check_read+0x11/0x20 [ 90.600962][ C1] _raw_spin_lock_bh+0x3b/0x50 [ 90.605738][ C1] ? release_sock+0x20/0x1c0 [ 90.610325][ C1] release_sock+0x20/0x1c0 [ 90.614744][ C1] wait_on_pending_writer+0x20f/0x420 [ 90.620112][ C1] ? ip6_rcv_finish+0x1de/0x2f0 [ 90.625121][ C1] ? tls_init+0x560/0x560 [ 90.629447][ C1] ? process_backlog+0x206/0x750 [ 90.634375][ C1] ? net_rx_action+0x508/0x10c0 [ 90.639218][ C1] ? __do_softirq+0x262/0x98c [ 90.643895][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 90.649691][ C1] ? inet_release+0xed/0x200 [ 90.654270][ C1] ? inet6_release+0x53/0x80 [ 90.658853][ C1] ? __sock_release+0xce/0x280 [ 90.663609][ C1] ? sock_close+0x1e/0x30 [ 90.667939][ C1] ? __fput+0x2ff/0x890 [ 90.672086][ C1] ? ____fput+0x16/0x20 [ 90.676234][ C1] ? task_work_run+0x145/0x1c0 [ 90.680991][ C1] ? exit_to_usermode_loop+0x316/0x380 [ 90.686465][ C1] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 90.691661][ C1] ? wait_on_pending_writer+0x420/0x420 [ 90.697296][ C1] tls_sk_proto_unhash+0x90/0x3f0 [ 90.702318][ C1] ? kfree_skbmem+0xa5/0x150 [ 90.706901][ C1] tcp_set_state+0x5b9/0x7d0 [ 90.711487][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 90.717721][ C1] ? __sk_mem_reduce_allocated+0x190/0x560 [ 90.723524][ C1] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 90.728976][ C1] ? __sk_mem_reclaim+0x55/0x70 [ 90.734855][ C1] ? tcp_write_queue_purge+0x5d8/0x1310 [ 90.740401][ C1] tcp_done+0xe2/0x320 [ 90.744462][ C1] tcp_reset+0x132/0x500 [ 90.748697][ C1] tcp_validate_incoming+0xa2d/0x1660 [ 90.754069][ C1] tcp_rcv_established+0x6b5/0x1e70 [ 90.759266][ C1] ? mark_held_locks+0xf0/0xf0 [ 90.764028][ C1] ? sk_filter_trim_cap+0x45f/0xb30 [ 90.769221][ C1] ? tcp_data_queue+0x4860/0x4860 [ 90.774249][ C1] ? do_raw_spin_lock+0x12a/0x2e0 [ 90.779267][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 90.784197][ C1] ? lock_acquire+0x190/0x410 [ 90.788874][ C1] tcp_v6_do_rcv+0x41e/0x12c0 [ 90.793573][ C1] tcp_v6_rcv+0x31f1/0x3500 [ 90.798071][ C1] ? __kasan_check_read+0x11/0x20 [ 90.803091][ C1] ? mark_lock+0x98/0x11e0 [ 90.807510][ C1] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 90.813058][ C1] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 90.818697][ C1] ip6_input_finish+0x84/0x170 [ 90.823454][ C1] ip6_input+0xe4/0x3f0 [ 90.827601][ C1] ? ip6_input_finish+0x170/0x170 [ 90.832621][ C1] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 90.838509][ C1] ? lock_downgrade+0x920/0x920 [ 90.843360][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 90.849605][ C1] ip6_rcv_finish+0x1de/0x2f0 [ 90.854280][ C1] ipv6_rcv+0x10e/0x420 [ 90.858432][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 90.863883][ C1] ? __kasan_check_read+0x11/0x20 [ 90.868905][ C1] ? mark_lock+0xc0/0x11e0 [ 90.873319][ C1] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 90.879214][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 90.884676][ C1] __netif_receive_skb_one_core+0x113/0x1a0 [ 90.890849][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 90.896741][ C1] ? lock_acquire+0x190/0x410 [ 90.901414][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 90.907654][ C1] __netif_receive_skb+0x2c/0x1d0 [ 90.912672][ C1] process_backlog+0x206/0x750 [ 90.917438][ C1] ? net_rx_action+0x27b/0x10c0 [ 90.922285][ C1] ? lockdep_hardirqs_on+0x19e/0x5d0 [ 90.927567][ C1] net_rx_action+0x508/0x10c0 [ 90.932330][ C1] ? napi_complete_done+0x4b0/0x4b0 [ 90.937529][ C1] __do_softirq+0x262/0x98c [ 90.942062][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 90.947432][ C1] do_softirq_own_stack+0x2a/0x40 [ 90.952445][ C1] [ 90.955400][ C1] do_softirq.part.0+0x11a/0x170 [ 90.960335][ C1] __local_bh_enable_ip+0x211/0x270 [ 90.965719][ C1] inet_csk_listen_stop+0x1e0/0x850 [ 90.970916][ C1] tcp_close+0xd5b/0x10e0 [ 90.975246][ C1] ? ip_mc_drop_socket+0x211/0x270 [ 90.980356][ C1] ? down_write+0xdf/0x150 [ 90.984857][ C1] inet_release+0xed/0x200 [ 90.989272][ C1] inet6_release+0x53/0x80 [ 90.993685][ C1] __sock_release+0xce/0x280 [ 90.998269][ C1] sock_close+0x1e/0x30 [ 91.002419][ C1] __fput+0x2ff/0x890 [ 91.006393][ C1] ? __sock_release+0x280/0x280 [ 91.011245][ C1] ____fput+0x16/0x20 [ 91.015400][ C1] task_work_run+0x145/0x1c0 [ 91.019984][ C1] exit_to_usermode_loop+0x316/0x380 [ 91.025264][ C1] do_syscall_64+0x65f/0x760 [ 91.030751][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 91.036649][ C1] RIP: 0033:0x4065d1 [ 91.040551][ 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 [ 91.060165][ C1] RSP: 002b:00007fff9a31afa0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 91.068572][ C1] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004065d1 [ 91.076556][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 91.084541][ C1] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 91.092529][ C1] R10: 00007fff9a31afd0 R11: 0000000000000293 R12: 00007fff9a31b000 [ 91.100496][ C1] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007