INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.10.12' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 syzkaller login: [ 57.010289] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 57.231202] ip (4533) used greatest stack depth: 54200 bytes left [ 57.276231] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.282655] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.289794] device bridge_slave_0 entered promiscuous mode [ 57.309993] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.316415] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.323572] device bridge_slave_1 entered promiscuous mode [ 57.343523] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 57.363492] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 57.418927] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 57.441304] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 57.525286] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 57.532722] team0: Port device team_slave_0 added [ 57.551925] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 57.559233] team0: Port device team_slave_1 added [ 57.578782] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 57.600972] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 57.623707] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 57.646547] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 57.819781] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.826299] bridge0: port 2(bridge_slave_1) entered forwarding state [ 57.833079] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.839451] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 58.475402] 8021q: adding VLAN 0 to HW filter on device bond0 [ 58.538693] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 58.601981] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 58.608222] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.615484] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.673356] 8021q: adding VLAN 0 to HW filter on device team0 executing program [ 59.028577] ================================================================== [ 59.035982] BUG: KMSAN: uninit-value in ip6_tnl_start_xmit+0x7d2/0x1ef0 [ 59.042723] CPU: 0 PID: 4504 Comm: syz-executor558 Not tainted 4.16.0+ #87 [ 59.049708] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.059046] Call Trace: [ 59.061615] dump_stack+0x185/0x1d0 [ 59.065222] ? ip6_tnl_start_xmit+0x7d2/0x1ef0 [ 59.069780] kmsan_report+0x142/0x240 [ 59.073560] __msan_warning_32+0x6c/0xb0 [ 59.077598] ip6_tnl_start_xmit+0x7d2/0x1ef0 [ 59.081982] ? kmsan_set_origin_inline+0x6b/0x120 [ 59.086803] ? ip6_tnl_dev_uninit+0x740/0x740 [ 59.091276] dev_hard_start_xmit+0x5f1/0xc70 [ 59.095663] __dev_queue_xmit+0x27ee/0x3520 [ 59.099970] ? sock_alloc_send_pskb+0xfee/0x1190 [ 59.104707] dev_queue_xmit+0x4b/0x60 [ 59.108488] ? __netdev_pick_tx+0xb60/0xb60 [ 59.112788] packet_sendmsg+0x7c70/0x8a30 [ 59.116913] ? kmsan_set_origin_inline+0x6b/0x120 [ 59.121732] ? __msan_poison_alloca+0x15c/0x1d0 [ 59.126378] ? __msan_poison_alloca+0x15c/0x1d0 [ 59.131026] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 59.136455] ? import_iovec+0x3cd/0x610 [ 59.140420] ? copy_msghdr_from_user+0x72c/0x830 [ 59.145156] ? compat_packet_setsockopt+0x360/0x360 [ 59.150147] ___sys_sendmsg+0xec0/0x1310 [ 59.154189] ? __fdget+0x4e/0x60 [ 59.157535] __sys_sendmmsg+0x42d/0x800 [ 59.161485] ? kmsan_set_origin_inline+0x6b/0x120 [ 59.166330] SYSC_sendmmsg+0xc4/0x110 [ 59.170116] SyS_sendmmsg+0x63/0x90 [ 59.173721] do_syscall_64+0x309/0x430 [ 59.177587] ? __sys_sendmmsg+0x800/0x800 [ 59.181716] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 59.186881] RIP: 0033:0x441819 [ 59.190045] RSP: 002b:00007ffe58ee8268 EFLAGS: 00000213 ORIG_RAX: 0000000000000133 [ 59.197747] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441819 [ 59.204993] RDX: 0000000000000002 RSI: 0000000020000100 RDI: 0000000000000003 [ 59.212238] RBP: 00000000006cd018 R08: 0000000000000000 R09: 0000000000000000 [ 59.219484] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000402510 [ 59.226730] R13: 00000000004025a0 R14: 0000000000000000 R15: 0000000000000000 [ 59.233977] [ 59.235578] Uninit was created at: [ 59.239099] kmsan_internal_poison_shadow+0xb8/0x1b0 [ 59.244178] kmsan_kmalloc+0x94/0x100 [ 59.247953] kmsan_slab_alloc+0x11/0x20 [ 59.251907] __kmalloc_node_track_caller+0xaed/0x11c0 [ 59.257072] __alloc_skb+0x2cf/0x9f0 [ 59.260762] alloc_skb_with_frags+0x1d4/0xb20 [ 59.265231] sock_alloc_send_pskb+0xb56/0x1190 [ 59.269796] packet_sendmsg+0x6454/0x8a30 [ 59.273917] ___sys_sendmsg+0xec0/0x1310 [ 59.277954] __sys_sendmmsg+0x42d/0x800 [ 59.281901] SYSC_sendmmsg+0xc4/0x110 [ 59.285684] SyS_sendmmsg+0x63/0x90 [ 59.289287] do_syscall_64+0x309/0x430 [ 59.293156] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 59.298321] ================================================================== [ 59.305650] Disabling lock debugging due to kernel taint [ 59.311083] Kernel panic - not syncing: panic_on_warn set ... [ 59.311083] [ 59.318422] CPU: 0 PID: 4504 Comm: syz-executor558 Tainted: G B 4.16.0+ #87 [ 59.326711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.336041] Call Trace: [ 59.338608] dump_stack+0x185/0x1d0 [ 59.342213] panic+0x39d/0x940 [ 59.345393] ? ip6_tnl_start_xmit+0x7d2/0x1ef0 [ 59.349949] kmsan_report+0x238/0x240 [ 59.353727] __msan_warning_32+0x6c/0xb0 [ 59.357764] ip6_tnl_start_xmit+0x7d2/0x1ef0 [ 59.362148] ? kmsan_set_origin_inline+0x6b/0x120 [ 59.366970] ? ip6_tnl_dev_uninit+0x740/0x740 [ 59.371444] dev_hard_start_xmit+0x5f1/0xc70 [ 59.375834] __dev_queue_xmit+0x27ee/0x3520 [ 59.380131] ? sock_alloc_send_pskb+0xfee/0x1190 [ 59.384874] dev_queue_xmit+0x4b/0x60 [ 59.388656] ? __netdev_pick_tx+0xb60/0xb60 [ 59.392961] packet_sendmsg+0x7c70/0x8a30 [ 59.397102] ? kmsan_set_origin_inline+0x6b/0x120 [ 59.401931] ? __msan_poison_alloca+0x15c/0x1d0 [ 59.406576] ? __msan_poison_alloca+0x15c/0x1d0 [ 59.411223] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 59.416653] ? import_iovec+0x3cd/0x610 [ 59.420609] ? copy_msghdr_from_user+0x72c/0x830 [ 59.425345] ? compat_packet_setsockopt+0x360/0x360 [ 59.430344] ___sys_sendmsg+0xec0/0x1310 [ 59.434386] ? __fdget+0x4e/0x60 [ 59.437735] __sys_sendmmsg+0x42d/0x800 [ 59.441686] ? kmsan_set_origin_inline+0x6b/0x120 [ 59.446509] SYSC_sendmmsg+0xc4/0x110 [ 59.450288] SyS_sendmmsg+0x63/0x90 [ 59.453899] do_syscall_64+0x309/0x430 [ 59.457788] ? __sys_sendmmsg+0x800/0x800 [ 59.461912] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 59.467076] RIP: 0033:0x441819 [ 59.470243] RSP: 002b:00007ffe58ee8268 EFLAGS: 00000213 ORIG_RAX: 0000000000000133 [ 59.477928] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441819 [ 59.485175] RDX: 0000000000000002 RSI: 0000000020000100 RDI: 0000000000000003 [ 59.492422] RBP: 00000000006cd018 R08: 0000000000000000 R09: 0000000000000000 [ 59.499665] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000402510 [ 59.506909] R13: 00000000004025a0 R14: 0000000000000000 R15: 0000000000000000 [ 59.514204] Dumping ftrace buffer: [ 59.517718] (ftrace buffer empty) [ 59.521416] Kernel Offset: disabled [ 59.525023] Rebooting in 86400 seconds..