[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.012060][ T26] audit: type=1800 audit(1564287670.265:25): pid=8572 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.058523][ T26] audit: type=1800 audit(1564287670.265:26): pid=8572 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.096797][ T26] audit: type=1800 audit(1564287670.265:27): pid=8572 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 '10.128.0.176' (ECDSA) to the list of known hosts. syzkaller login: [ 66.559660][ T8730] IPVS: ftp: loaded support on port[0] = 21 [ 66.614163][ T8730] chnl_net:caif_netlink_parms(): no params data found [ 66.641437][ T8730] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.648969][ T8730] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.656685][ T8730] device bridge_slave_0 entered promiscuous mode [ 66.664888][ T8730] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.672479][ T8730] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.680204][ T8730] device bridge_slave_1 entered promiscuous mode [ 66.697634][ T8730] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 66.708479][ T8730] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 66.726084][ T8730] team0: Port device team_slave_0 added [ 66.733400][ T8730] team0: Port device team_slave_1 added [ 66.800294][ T8730] device hsr_slave_0 entered promiscuous mode [ 66.869840][ T8730] device hsr_slave_1 entered promiscuous mode [ 66.916594][ T8730] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.924599][ T8730] bridge0: port 2(bridge_slave_1) entered forwarding state [ 66.932423][ T8730] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.939531][ T8730] bridge0: port 1(bridge_slave_0) entered forwarding state [ 66.972515][ T8730] 8021q: adding VLAN 0 to HW filter on device bond0 [ 66.984341][ T3010] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 67.004930][ T3010] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.013552][ T3010] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.022919][ T3010] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 67.034002][ T8730] 8021q: adding VLAN 0 to HW filter on device team0 [ 67.044419][ T3510] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 67.053254][ T3510] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.060356][ T3510] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.080897][ T3010] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 67.089852][ T3010] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.096922][ T3010] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.105281][ T3010] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 67.114025][ T3010] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 67.123103][ T3010] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 67.132395][ T3010] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 67.143393][ T8730] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 67.155427][ T8730] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 67.163569][ T3510] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 67.182225][ T8730] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 67.217247][ T8730] Started in network mode [ 67.221757][ T8730] Own node identity ac14141, cluster identity 4711 [ 67.228654][ T8730] New replicast peer: 172.20.20.0 [ 67.233999][ T8730] check_preemption_disabled: 3 callbacks suppressed [ 67.234010][ T8730] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor180/8730 [ 67.250877][ T8730] caller is dst_cache_get+0x3d/0xb0 [ 67.256089][ T8730] CPU: 0 PID: 8730 Comm: syz-executor180 Not tainted 5.2.0+ #97 [ 67.263702][ T8730] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.273743][ T8730] Call Trace: [ 67.277107][ T8730] dump_stack+0x172/0x1f0 [ 67.281424][ T8730] debug_smp_processor_id.cold+0x87/0x9d [ 67.287050][ T8730] dst_cache_get+0x3d/0xb0 [ 67.291455][ T8730] tipc_udp_xmit.isra.0+0xc4/0xb80 [ 67.296560][ T8730] ? kasan_kmalloc+0x9/0x10 [ 67.301048][ T8730] ? tipc_udp_addr2str+0x170/0x170 [ 67.306142][ T8730] ? __copy_skb_header+0x2e8/0x550 [ 67.311233][ T8730] ? __skb_checksum_complete+0x3f0/0x3f0 [ 67.316846][ T8730] ? netdev_alloc_frag+0x1b0/0x1b0 [ 67.322115][ T8730] ? skb_copy_header+0x21/0x2b0 [ 67.326948][ T8730] ? __pskb_copy_fclone+0x516/0xc90 [ 67.332133][ T8730] tipc_udp_send_msg+0x29a/0x490 [ 67.337055][ T8730] tipc_bearer_xmit_skb+0x17e/0x370 [ 67.342243][ T8730] tipc_enable_bearer+0xacf/0xd30 [ 67.347253][ T8730] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 67.353138][ T8730] ? tipc_bearer_xmit_skb+0x370/0x370 [ 67.358497][ T8730] ? nla_memcpy+0xb0/0xb0 [ 67.362835][ T8730] __tipc_nl_bearer_enable+0x2de/0x3a0 [ 67.368653][ T8730] ? __tipc_nl_bearer_enable+0x2de/0x3a0 [ 67.374626][ T8730] ? tipc_nl_bearer_disable+0x40/0x40 [ 67.379991][ T8730] ? nla_memcpy+0xb0/0xb0 [ 67.384307][ T8730] ? lock_acquire+0x190/0x410 [ 67.388981][ T8730] tipc_nl_bearer_enable+0x23/0x40 [ 67.394272][ T8730] genl_family_rcv_msg+0x74b/0xf90 [ 67.399381][ T8730] ? genl_unregister_family+0x7b0/0x7b0 [ 67.404910][ T8730] ? __kasan_check_read+0x11/0x20 [ 67.410467][ T8730] ? __lock_acquire+0x1702/0x4c30 [ 67.416067][ T8730] ? __dev_queue_xmit+0xbb5/0x3650 [ 67.421176][ T8730] genl_rcv_msg+0xca/0x16c [ 67.425590][ T8730] netlink_rcv_skb+0x177/0x450 [ 67.430345][ T8730] ? genl_family_rcv_msg+0xf90/0xf90 [ 67.435996][ T8730] ? netlink_ack+0xb30/0xb30 [ 67.440585][ T8730] ? __kasan_check_write+0x14/0x20 [ 67.445768][ T8730] ? netlink_deliver_tap+0x254/0xbf0 [ 67.451042][ T8730] genl_rcv+0x29/0x40 [ 67.455054][ T8730] netlink_unicast+0x531/0x710 [ 67.459809][ T8730] ? netlink_attachskb+0x7c0/0x7c0 [ 67.464903][ T8730] ? _copy_from_iter_full+0x25d/0x8a0 [ 67.470299][ T8730] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 67.476567][ T8730] ? __check_object_size+0x3d/0x43c [ 67.481755][ T8730] netlink_sendmsg+0x8a5/0xd60 [ 67.486506][ T8730] ? netlink_unicast+0x710/0x710 [ 67.492259][ T8730] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 67.497794][ T8730] ? apparmor_socket_sendmsg+0x2a/0x30 [ 67.503239][ T8730] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.509555][ T8730] ? security_socket_sendmsg+0x8d/0xc0 [ 67.515004][ T8730] ? netlink_unicast+0x710/0x710 [ 67.520026][ T8730] sock_sendmsg+0xd7/0x130 [ 67.524433][ T8730] ___sys_sendmsg+0x803/0x920 [ 67.529114][ T8730] ? copy_msghdr_from_user+0x440/0x440 [ 67.534580][ T8730] ? lock_downgrade+0x920/0x920 [ 67.539438][ T8730] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 67.545332][ T8730] ? lockdep_hardirqs_on+0x418/0x5d0 [ 67.550606][ T8730] ? __kasan_check_read+0x11/0x20 [ 67.555612][ T8730] ? mark_lock+0xc0/0x11e0 [ 67.560027][ T8730] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 67.565827][ T8730] ? __kasan_check_read+0x11/0x20 [ 67.570847][ T8730] ? __lock_acquire+0x1702/0x4c30 [ 67.576034][ T8730] ? debug_object_deactivate+0x320/0x320 [ 67.581935][ T8730] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.588249][ T8730] ? __fget_light+0x1a9/0x230 [ 67.592914][ T8730] ? __fdget+0x1b/0x20 [ 67.597062][ T8730] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 67.603385][ T8730] __sys_sendmsg+0x105/0x1d0 [ 67.607967][ T8730] ? __sys_sendmsg_sock+0xd0/0xd0 [ 67.613001][ T8730] ? lockdep_hardirqs_on+0x418/0x5d0 [ 67.618305][ T8730] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 67.623860][ T8730] ? do_syscall_64+0x26/0x6a0 [ 67.629686][ T8730] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.635745][ T8730] ? do_syscall_64+0x26/0x6a0 [ 67.640424][ T8730] __x64_sys_sendmsg+0x78/0xb0 [ 67.645199][ T8730] do_syscall_64+0xfd/0x6a0 [ 67.649696][ T8730] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.655682][ T8730] RIP: 0033:0x4458d9 [ 67.659569][ T8730] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 9b d4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.679727][ T8730] RSP: 002b:00007ffcaa23fec8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 67.688401][ T8730] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004458d9 [ 67.696379][ T8730] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 67.704425][ T8730] RBP: 00007ffcaa23fee0 R08: 0000000000000000 R09: 0000000001bbbbbb [ 67.712379][ T8730] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 67.720328][ T8730] R13: 0000000000403290 R14: 0000000000000000 R15: 0000000000000000 [ 67.732143][ T8730] Enabled bearer , priority 10