[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 68.127144][ T27] audit: type=1800 audit(1563969000.390:25): pid=9075 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 68.188036][ T27] audit: type=1800 audit(1563969000.390:26): pid=9075 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 68.214698][ T27] audit: type=1800 audit(1563969000.390:27): pid=9075 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.127' (ECDSA) to the list of known hosts. syzkaller login: [ 95.556844][ T9231] IPVS: ftp: loaded support on port[0] = 21 [ 95.632154][ T9231] chnl_net:caif_netlink_parms(): no params data found [ 95.663087][ T9231] bridge0: port 1(bridge_slave_0) entered blocking state [ 95.671360][ T9231] bridge0: port 1(bridge_slave_0) entered disabled state [ 95.679678][ T9231] device bridge_slave_0 entered promiscuous mode [ 95.688484][ T9231] bridge0: port 2(bridge_slave_1) entered blocking state [ 95.695648][ T9231] bridge0: port 2(bridge_slave_1) entered disabled state [ 95.703684][ T9231] device bridge_slave_1 entered promiscuous mode [ 95.722478][ T9231] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 95.734643][ T9231] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 95.755099][ T9231] team0: Port device team_slave_0 added [ 95.762753][ T9231] team0: Port device team_slave_1 added [ 95.830129][ T9231] device hsr_slave_0 entered promiscuous mode [ 95.908315][ T9231] device hsr_slave_1 entered promiscuous mode [ 95.976818][ T9231] bridge0: port 2(bridge_slave_1) entered blocking state [ 95.984287][ T9231] bridge0: port 2(bridge_slave_1) entered forwarding state [ 95.992404][ T9231] bridge0: port 1(bridge_slave_0) entered blocking state [ 95.999555][ T9231] bridge0: port 1(bridge_slave_0) entered forwarding state [ 96.036217][ T9231] 8021q: adding VLAN 0 to HW filter on device bond0 [ 96.050591][ T9233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 96.061197][ T9233] bridge0: port 1(bridge_slave_0) entered disabled state [ 96.070305][ T9233] bridge0: port 2(bridge_slave_1) entered disabled state [ 96.079640][ T9233] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 96.092437][ T9231] 8021q: adding VLAN 0 to HW filter on device team0 [ 96.104211][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 96.113406][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.120575][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 96.140426][ T9234] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 96.150375][ T9234] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.157509][ T9234] bridge0: port 2(bridge_slave_1) entered forwarding state [ 96.165901][ T9234] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 96.175529][ T9233] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 96.186695][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 96.200277][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 96.213841][ T9231] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 96.226247][ T9231] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 96.234876][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 96.254384][ T9231] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 96.300484][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 96.477456][ C0] BUG: spinlock recursion on CPU#0, syz-executor596/9231 [ 96.484608][ C0] lock: 0xffff8880a16c2d08, .magic: dead4ead, .owner: syz-executor596/9231, .owner_cpu: 0 [ 96.494765][ C0] CPU: 0 PID: 9231 Comm: syz-executor596 Not tainted 5.3.0-rc1-next-20190724 #50 [ 96.503879][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.514135][ C0] Call Trace: [ 96.517596][ C0] <IRQ> [ 96.520533][ C0] dump_stack+0x172/0x1f0 [ 96.524896][ C0] spin_dump.cold+0x81/0xe6 [ 96.529425][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.535680][ C0] do_raw_spin_lock+0x252/0x2e0 [ 96.540542][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 96.545478][ C0] ? lock_acquire+0x190/0x410 [ 96.550193][ C0] ? release_sock+0x20/0x1c0 [ 96.554812][ C0] ? __kasan_check_read+0x11/0x20 [ 96.559852][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 96.564626][ C0] ? release_sock+0x20/0x1c0 [ 96.569222][ C0] release_sock+0x20/0x1c0 [ 96.573679][ C0] wait_on_pending_writer+0x20f/0x420 [ 96.579081][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 96.583934][ C0] ? tls_init+0x560/0x560 [ 96.588274][ C0] ? process_backlog+0x206/0x750 [ 96.593221][ C0] ? net_rx_action+0x508/0x10c0 [ 96.598076][ C0] ? __do_softirq+0x262/0x98c [ 96.602752][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 96.608655][ C0] ? inet_release+0xed/0x200 [ 96.613249][ C0] ? inet6_release+0x53/0x80 [ 96.617920][ C0] ? __sock_release+0xce/0x280 [ 96.622720][ C0] ? sock_close+0x1e/0x30 [ 96.627062][ C0] ? __fput+0x2ff/0x890 [ 96.631218][ C0] ? ____fput+0x16/0x20 [ 96.635367][ C0] ? task_work_run+0x145/0x1c0 [ 96.640139][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 96.649418][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 96.654612][ C0] ? wait_on_pending_writer+0x420/0x420 [ 96.660155][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 96.665170][ C0] ? kfree_skbmem+0xa5/0x150 [ 96.669760][ C0] tcp_set_state+0x5b9/0x7d0 [ 96.674344][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 96.680584][ C0] ? __sk_mem_reduce_allocated+0x190/0x560 [ 96.686388][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 96.691862][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 96.696813][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 96.702462][ C0] tcp_done+0xe2/0x320 [ 96.706543][ C0] tcp_reset+0x132/0x500 [ 96.710888][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 96.716279][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 96.721577][ C0] ? mark_held_locks+0xf0/0xf0 [ 96.726366][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 96.731591][ C0] ? tcp_data_queue+0x4860/0x4860 [ 96.736614][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 96.741636][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 96.746745][ C0] ? lock_acquire+0x190/0x410 [ 96.751517][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 96.756203][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 96.760789][ C0] ? __kasan_check_read+0x11/0x20 [ 96.765805][ C0] ? mark_lock+0x98/0x11e0 [ 96.770226][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 96.775861][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 96.781505][ C0] ip6_input_finish+0x84/0x170 [ 96.786261][ C0] ip6_input+0xe4/0x3f0 [ 96.790415][ C0] ? ip6_input_finish+0x170/0x170 [ 96.795435][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 96.801324][ C0] ? lock_downgrade+0x920/0x920 [ 96.806177][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 96.812415][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 96.817090][ C0] ipv6_rcv+0x10e/0x420 [ 96.821241][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 96.826692][ C0] ? __kasan_check_read+0x11/0x20 [ 96.831708][ C0] ? mark_lock+0xc0/0x11e0 [ 96.836122][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 96.842103][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 96.847557][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 96.853540][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 96.859432][ C0] ? lock_acquire+0x190/0x410 [ 96.864104][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.870336][ C0] __netif_receive_skb+0x2c/0x1d0 [ 96.875355][ C0] process_backlog+0x206/0x750 [ 96.880284][ C0] ? net_rx_action+0x27b/0x10c0 [ 96.885132][ C0] ? lockdep_hardirqs_on+0x19e/0x5d0 [ 96.890435][ C0] net_rx_action+0x508/0x10c0 [ 96.895127][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 96.900330][ C0] __do_softirq+0x262/0x98c [ 96.904852][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 96.910229][ C0] do_softirq_own_stack+0x2a/0x40 [ 96.915245][ C0] </IRQ> [ 96.918191][ C0] do_softirq.part.0+0x11a/0x170 [ 96.923125][ C0] __local_bh_enable_ip+0x211/0x270 [ 96.928322][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 96.933517][ C0] tcp_close+0xd5b/0x10e0 [ 96.937838][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 96.942941][ C0] ? down_write+0xdf/0x150 [ 96.947354][ C0] inet_release+0xed/0x200 [ 96.951768][ C0] inet6_release+0x53/0x80 [ 96.956183][ C0] __sock_release+0xce/0x280 [ 96.960766][ C0] sock_close+0x1e/0x30 [ 96.964917][ C0] __fput+0x2ff/0x890 [ 96.969000][ C0] ? __sock_release+0x280/0x280 [ 96.973847][ C0] ____fput+0x16/0x20 [ 96.977819][ C0] task_work_run+0x145/0x1c0 [ 96.982409][ C0] exit_to_usermode_loop+0x316/0x380 [ 96.987686][ C0] do_syscall_64+0x65f/0x760 [ 96.992274][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.998157][ C0] RIP: 0033:0x406581 [ 97.002069][ 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 [ 97.021697][ C0] RSP: 002b:00007ffd1ccb84a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 97.030120][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406581 [ 97.038127][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 97.046114][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 97.054096][ C0] R10: 00007ffd1ccb84d0 R11: 0000000000000293 R12: 00007ffd1ccb8500 [ 97.062082][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007