[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 103.670169] audit: type=1800 audit(1552705350.718:25): pid=11402 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 103.689361] audit: type=1800 audit(1552705350.728:26): pid=11402 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 103.708852] audit: type=1800 audit(1552705350.748:27): pid=11402 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 '10.128.10.23' (ECDSA) to the list of known hosts. syzkaller login: [ 113.896042] IPVS: ftp: loaded support on port[0] = 21 [ 113.974759] chnl_net:caif_netlink_parms(): no params data found [ 114.018585] bridge0: port 1(bridge_slave_0) entered blocking state [ 114.025078] bridge0: port 1(bridge_slave_0) entered disabled state [ 114.033231] device bridge_slave_0 entered promiscuous mode [ 114.040933] bridge0: port 2(bridge_slave_1) entered blocking state [ 114.047638] bridge0: port 2(bridge_slave_1) entered disabled state [ 114.055186] device bridge_slave_1 entered promiscuous mode [ 114.077999] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 114.088175] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 114.110821] team0: Port device team_slave_0 added [ 114.118066] team0: Port device team_slave_1 added [ 114.175030] device hsr_slave_0 entered promiscuous mode [ 114.212088] device hsr_slave_1 entered promiscuous mode [ 114.263994] bridge0: port 2(bridge_slave_1) entered blocking state [ 114.270514] bridge0: port 2(bridge_slave_1) entered forwarding state [ 114.277818] bridge0: port 1(bridge_slave_0) entered blocking state [ 114.284316] bridge0: port 1(bridge_slave_0) entered forwarding state [ 114.334004] 8021q: adding VLAN 0 to HW filter on device bond0 [ 114.348312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 114.357829] bridge0: port 1(bridge_slave_0) entered disabled state [ 114.366764] bridge0: port 2(bridge_slave_1) entered disabled state [ 114.374758] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 114.389474] 8021q: adding VLAN 0 to HW filter on device team0 [ 114.400838] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 114.409325] bridge0: port 1(bridge_slave_0) entered blocking state [ 114.416028] bridge0: port 1(bridge_slave_0) entered forwarding state [ 114.430229] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 114.438352] bridge0: port 2(bridge_slave_1) entered blocking state [ 114.444893] bridge0: port 2(bridge_slave_1) entered forwarding state [ 114.474053] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 114.484624] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 114.497230] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 114.504979] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 114.521718] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 114.533577] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 114.560377] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 120.909709] ================================================================== [ 120.917141] BUG: KMSAN: uninit-value in gue_err+0x514/0xfa0 [ 120.922880] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.0.0+ #15 [ 120.929299] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 120.938666] Call Trace: [ 120.941277] dump_stack+0x173/0x1d0 [ 120.944948] kmsan_report+0x12e/0x2a0 [ 120.948784] __msan_warning+0x82/0xf0 [ 120.952616] gue_err+0x514/0xfa0 executing program executing program executing program [ 120.956044] ? fou_build_header+0x690/0x690 [ 120.960387] __udp4_lib_err+0x12e6/0x1d40 [ 120.964610] udp_err+0x74/0x90 [ 120.967947] ? __udp4_lib_err+0x1d40/0x1d40 [ 120.972299] icmp_unreach+0xb65/0x1070 [ 120.976237] ? icmp_discard+0x30/0x30 [ 120.980084] icmp_rcv+0x11a1/0x1950 [ 120.983852] ? local_bh_enable+0x40/0x40 [ 120.988034] ip_protocol_deliver_rcu+0x584/0xbb0 [ 120.992845] ip_local_deliver+0x624/0x7b0 [ 120.997039] ? ip_local_deliver+0x7b0/0x7b0 [ 121.001389] ? ip_protocol_deliver_rcu+0xbb0/0xbb0 [ 121.006350] ip_rcv+0x6bd/0x740 executing program executing program [ 121.010025] ? ip_rcv_core+0x11d0/0x11d0 [ 121.014123] process_backlog+0x756/0x10e0 [ 121.018323] ? ip_local_deliver_finish+0x320/0x320 [ 121.023286] ? rps_trigger_softirq+0x2e0/0x2e0 [ 121.027901] net_rx_action+0x78b/0x1a60 [ 121.031957] ? net_tx_action+0xca0/0xca0 [ 121.036050] __do_softirq+0x53f/0x93a [ 121.039896] ? ksoftirqd_should_run+0x30/0x30 [ 121.044421] run_ksoftirqd+0x26/0x50 [ 121.048156] smpboot_thread_fn+0x4d0/0x9f0 [ 121.052447] kthread+0x4a1/0x4e0 executing program executing program [ 121.056908] ? cpu_report_death+0x190/0x190 [ 121.061338] ? schedule_tail+0x1b2/0x410 [ 121.065432] ? kthread_blkcg+0xf0/0xf0 [ 121.069352] ret_from_fork+0x35/0x40 [ 121.073106] [ 121.074740] Uninit was created at: [ 121.078312] kmsan_internal_poison_shadow+0x92/0x150 [ 121.083430] kmsan_kmalloc+0xa6/0x130 [ 121.087244] kmsan_slab_alloc+0xe/0x10 [ 121.091147] __kmalloc_node_track_caller+0xe9e/0xff0 [ 121.096272] __alloc_skb+0x309/0xa20 [ 121.100018] alloc_skb_with_frags+0x186/0xa60 [ 121.104530] sock_alloc_send_pskb+0xafd/0x10a0 executing program executing program [ 121.109132] sock_alloc_send_skb+0xca/0xe0 [ 121.113392] __ip_append_data+0x34cd/0x5000 [ 121.117775] ip_append_data+0x324/0x480 [ 121.121790] icmp_push_reply+0x23d/0x7e0 [ 121.125873] __icmp_send+0x2ea3/0x30f0 [ 121.129780] __udp4_lib_rcv+0x36d7/0x4b80 [ 121.133942] udp_rcv+0x5c/0x70 [ 121.137163] ip_protocol_deliver_rcu+0x584/0xbb0 [ 121.141945] ip_local_deliver+0x624/0x7b0 [ 121.146148] ip_rcv+0x6bd/0x740 [ 121.149445] process_backlog+0x756/0x10e0 [ 121.153615] net_rx_action+0x78b/0x1a60 executing program executing program executing program [ 121.157610] __do_softirq+0x53f/0x93a [ 121.161418] ================================================================== [ 121.168779] Disabling lock debugging due to kernel taint [ 121.174274] Kernel panic - not syncing: panic_on_warn set ... [ 121.180211] CPU: 1 PID: 16 Comm: ksoftirqd/1 Tainted: G B 5.0.0+ #15 [ 121.188012] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.197378] Call Trace: [ 121.199998] dump_stack+0x173/0x1d0 [ 121.203661] panic+0x3d1/0xb01 [ 121.206928] kmsan_report+0x293/0x2a0 executing program executing program [ 121.210781] __msan_warning+0x82/0xf0 [ 121.214607] gue_err+0x514/0xfa0 [ 121.218039] ? fou_build_header+0x690/0x690 [ 121.222390] __udp4_lib_err+0x12e6/0x1d40 [ 121.226601] udp_err+0x74/0x90 [ 121.229829] ? __udp4_lib_err+0x1d40/0x1d40 [ 121.234177] icmp_unreach+0xb65/0x1070 [ 121.238122] ? icmp_discard+0x30/0x30 [ 121.241948] icmp_rcv+0x11a1/0x1950 [ 121.245621] ? local_bh_enable+0x40/0x40 [ 121.249709] ip_protocol_deliver_rcu+0x584/0xbb0 [ 121.254522] ip_local_deliver+0x624/0x7b0 executing program executing program [ 121.258713] ? ip_local_deliver+0x7b0/0x7b0 [ 121.263091] ? ip_protocol_deliver_rcu+0xbb0/0xbb0 [ 121.268045] ip_rcv+0x6bd/0x740 [ 121.271354] ? ip_rcv_core+0x11d0/0x11d0 [ 121.275441] process_backlog+0x756/0x10e0 [ 121.279641] ? ip_local_deliver_finish+0x320/0x320 [ 121.284606] ? rps_trigger_softirq+0x2e0/0x2e0 [ 121.289212] net_rx_action+0x78b/0x1a60 [ 121.293333] ? net_tx_action+0xca0/0xca0 [ 121.297418] __do_softirq+0x53f/0x93a [ 121.301267] ? ksoftirqd_should_run+0x30/0x30 [ 121.305794] run_ksoftirqd+0x26/0x50 executing program [ 121.309529] smpboot_thread_fn+0x4d0/0x9f0 [ 121.313849] kthread+0x4a1/0x4e0 [ 121.317245] ? cpu_report_death+0x190/0x190 [ 121.321587] ? schedule_tail+0x1b2/0x410 [ 121.325677] ? kthread_blkcg+0xf0/0xf0 [ 121.329597] ret_from_fork+0x35/0x40 [ 121.334096] Kernel Offset: disabled [ 121.337729] Rebooting in 86400 seconds..