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 '10.128.0.44' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: File exists RTNETLINK answers: Operation not supported syzkaller login: [ 40.963166] ip (3606) used greatest stack depth: 54544 bytes left RTNETLINK answers: Operation not supported Cannot find device "vcan0" Cannot find device "vcan0" [ 41.107160] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" [ 42.197272] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready Cannot find device "team0" [ 42.251566] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 42.257781] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 42.265367] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready Cannot find device "team0" Cannot find device "team0" Cannot find device "team0" executing program [ 42.364664] ================================================================== [ 42.372061] BUG: KMSAN: uninit-value in dccp_invalid_packet+0x3b8/0xf50 [ 42.378965] CPU: 1 PID: 3572 Comm: syzkaller338124 Not tainted 4.16.0+ #82 [ 42.385948] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.395275] Call Trace: [ 42.397834] [ 42.399961] dump_stack+0x185/0x1d0 [ 42.403563] ? dccp_invalid_packet+0x3b8/0xf50 [ 42.408118] kmsan_report+0x142/0x240 [ 42.411894] __msan_warning_32+0x6c/0xb0 [ 42.415930] dccp_invalid_packet+0x3b8/0xf50 [ 42.420315] ? ip_local_deliver_finish+0x6ed/0xd40 [ 42.425219] ? ip_local_deliver_finish+0x6ed/0xd40 [ 42.430123] dccp_v4_rcv+0xf7/0x2630 [ 42.433809] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 42.439145] ? raw_local_deliver+0x1462/0x1470 [ 42.443701] ? ip_local_deliver_finish+0x4a5/0xd40 [ 42.448600] ? local_bh_enable+0x40/0x40 [ 42.452633] ? local_bh_enable+0x40/0x40 [ 42.456668] ip_local_deliver_finish+0x6ed/0xd40 [ 42.461401] ip_local_deliver+0x43c/0x4e0 [ 42.465527] ? ip_call_ra_chain+0x7b0/0x7b0 [ 42.469823] ip_rcv_finish+0x1253/0x16d0 [ 42.473864] ip_rcv+0x119d/0x16f0 [ 42.477295] ? kmsan_set_origin_inline+0x6b/0x120 [ 42.482118] __netif_receive_skb_core+0x47cf/0x4a80 [ 42.487116] ? rb_insert_color+0xa4/0x1300 [ 42.491335] ? kmsan_internal_memset_shadow_inline+0xd0/0xd0 [ 42.497115] ? ip_local_deliver_finish+0xd40/0xd40 [ 42.502021] process_backlog+0x62d/0xe20 [ 42.506060] ? rps_trigger_softirq+0x2f0/0x2f0 [ 42.510615] net_rx_action+0x7c1/0x1a70 [ 42.514566] ? net_tx_action+0xab0/0xab0 [ 42.518601] __do_softirq+0x56d/0x93d [ 42.522379] do_softirq_own_stack+0x2a/0x40 [ 42.526671] [ 42.528890] __local_bh_enable_ip+0x114/0x140 [ 42.533380] local_bh_enable+0x36/0x40 [ 42.537251] ip_finish_output2+0x124e/0x1380 [ 42.541638] ip_finish_output+0xcb0/0xff0 [ 42.545765] ip_output+0x502/0x5c0 [ 42.549300] ? __msan_poison_alloca+0x15c/0x1d0 [ 42.553957] ? ip_finish_output+0xff0/0xff0 [ 42.558261] ip_send_skb+0x5f3/0x820 [ 42.561963] ip_push_pending_frames+0x105/0x170 [ 42.566614] raw_sendmsg+0x2960/0x3ed0 [ 42.570485] ? __msan_poison_alloca+0x15c/0x1d0 [ 42.575142] ? compat_raw_ioctl+0x100/0x100 [ 42.579443] inet_sendmsg+0x48d/0x740 [ 42.583219] ? security_socket_sendmsg+0x9e/0x210 [ 42.588039] ? inet_getname+0x500/0x500 [ 42.591989] SYSC_sendto+0x6c3/0x7e0 [ 42.595682] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 42.601109] ? prepare_exit_to_usermode+0x149/0x3a0 [ 42.606107] SyS_sendto+0x8a/0xb0 [ 42.609532] do_syscall_64+0x309/0x430 [ 42.613395] ? SYSC_getpeername+0x560/0x560 [ 42.617697] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.622860] RIP: 0033:0x441709 [ 42.626025] RSP: 002b:00007ffffde4d688 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 42.633706] RAX: ffffffffffffffda RBX: 000000000000001b RCX: 0000000000441709 [ 42.640950] RDX: 0000000000000030 RSI: 0000000020000140 RDI: 0000000000000003 [ 42.648192] RBP: 00000000004a3318 R08: 0000000020000000 R09: 0000000000000010 [ 42.655436] R10: 0000000000000000 R11: 0000000000000217 R12: 00007ffffde4d768 [ 42.662681] R13: 0000000000402490 R14: 0000000000000000 R15: 0000000000000000 [ 42.669927] [ 42.671527] Uninit was stored to memory at: [ 42.675823] kmsan_internal_chain_origin+0x12b/0x210 [ 42.680900] kmsan_memcpy_origins+0x11d/0x170 [ 42.685368] __msan_memcpy+0x19f/0x1f0 [ 42.689229] skb_copy_bits+0x63a/0xdb0 [ 42.693093] __pskb_pull_tail+0x483/0x22e0 [ 42.697305] dccp_invalid_packet+0x352/0xf50 [ 42.701684] dccp_v4_rcv+0xf7/0x2630 [ 42.705373] ip_local_deliver_finish+0x6ed/0xd40 [ 42.710104] ip_local_deliver+0x43c/0x4e0 [ 42.714226] ip_rcv_finish+0x1253/0x16d0 [ 42.718268] ip_rcv+0x119d/0x16f0 [ 42.721698] __netif_receive_skb_core+0x47cf/0x4a80 [ 42.726687] process_backlog+0x62d/0xe20 [ 42.730720] net_rx_action+0x7c1/0x1a70 [ 42.734669] __do_softirq+0x56d/0x93d [ 42.738439] Uninit was created at: [ 42.741951] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 42.746939] kmsan_alloc_page+0x82/0xe0 [ 42.750888] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 42.755677] alloc_pages_current+0x6b5/0x970 [ 42.762056] skb_page_frag_refill+0x3ba/0x5e0 [ 42.766521] sk_page_frag_refill+0xa4/0x340 [ 42.770814] __ip_append_data+0x107e/0x3d10 [ 42.775106] ip_append_data+0x2fb/0x440 [ 42.779053] raw_sendmsg+0x287b/0x3ed0 [ 42.782913] inet_sendmsg+0x48d/0x740 [ 42.786699] SYSC_sendto+0x6c3/0x7e0 [ 42.790383] SyS_sendto+0x8a/0xb0 [ 42.793811] do_syscall_64+0x309/0x430 [ 42.797670] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.802827] ================================================================== [ 42.810155] Disabling lock debugging due to kernel taint [ 42.815574] Kernel panic - not syncing: panic_on_warn set ... [ 42.815574] [ 42.822912] CPU: 1 PID: 3572 Comm: syzkaller338124 Tainted: G B 4.16.0+ #82 [ 42.831194] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.840529] Call Trace: [ 42.843085] [ 42.845210] dump_stack+0x185/0x1d0 [ 42.848809] panic+0x39d/0x940 [ 42.851987] ? dccp_invalid_packet+0x3b8/0xf50 [ 42.856542] kmsan_report+0x238/0x240 [ 42.860318] __msan_warning_32+0x6c/0xb0 [ 42.864351] dccp_invalid_packet+0x3b8/0xf50 [ 42.868732] ? ip_local_deliver_finish+0x6ed/0xd40 [ 42.873634] ? ip_local_deliver_finish+0x6ed/0xd40 [ 42.878535] dccp_v4_rcv+0xf7/0x2630 [ 42.882221] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 42.887558] ? raw_local_deliver+0x1462/0x1470 [ 42.892118] ? ip_local_deliver_finish+0x4a5/0xd40 [ 42.897018] ? local_bh_enable+0x40/0x40 [ 42.901067] ? local_bh_enable+0x40/0x40 [ 42.905104] ip_local_deliver_finish+0x6ed/0xd40 [ 42.909847] ip_local_deliver+0x43c/0x4e0 [ 42.913968] ? ip_call_ra_chain+0x7b0/0x7b0 [ 42.918263] ip_rcv_finish+0x1253/0x16d0 [ 42.922302] ip_rcv+0x119d/0x16f0 [ 42.925728] ? kmsan_set_origin_inline+0x6b/0x120 [ 42.930547] __netif_receive_skb_core+0x47cf/0x4a80 [ 42.935539] ? rb_insert_color+0xa4/0x1300 [ 42.939747] ? kmsan_internal_memset_shadow_inline+0xd0/0xd0 [ 42.945523] ? ip_local_deliver_finish+0xd40/0xd40 [ 42.950424] process_backlog+0x62d/0xe20 [ 42.954466] ? rps_trigger_softirq+0x2f0/0x2f0 [ 42.959040] net_rx_action+0x7c1/0x1a70 [ 42.963001] ? net_tx_action+0xab0/0xab0 [ 42.967055] __do_softirq+0x56d/0x93d [ 42.970835] do_softirq_own_stack+0x2a/0x40 [ 42.975128] [ 42.977345] __local_bh_enable_ip+0x114/0x140 [ 42.981815] local_bh_enable+0x36/0x40 [ 42.985688] ip_finish_output2+0x124e/0x1380 [ 42.990077] ip_finish_output+0xcb0/0xff0 [ 42.994202] ip_output+0x502/0x5c0 [ 42.997718] ? __msan_poison_alloca+0x15c/0x1d0 [ 43.002369] ? ip_finish_output+0xff0/0xff0 [ 43.006664] ip_send_skb+0x5f3/0x820 [ 43.010354] ip_push_pending_frames+0x105/0x170 [ 43.015017] raw_sendmsg+0x2960/0x3ed0 [ 43.018895] ? __msan_poison_alloca+0x15c/0x1d0 [ 43.023546] ? compat_raw_ioctl+0x100/0x100 [ 43.027846] inet_sendmsg+0x48d/0x740 [ 43.031624] ? security_socket_sendmsg+0x9e/0x210 [ 43.036444] ? inet_getname+0x500/0x500 [ 43.040397] SYSC_sendto+0x6c3/0x7e0 [ 43.044098] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 43.049527] ? prepare_exit_to_usermode+0x149/0x3a0 [ 43.054524] SyS_sendto+0x8a/0xb0 [ 43.057952] do_syscall_64+0x309/0x430 [ 43.061818] ? SYSC_getpeername+0x560/0x560 [ 43.066126] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.071292] RIP: 0033:0x441709 [ 43.074455] RSP: 002b:00007ffffde4d688 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 43.082150] RAX: ffffffffffffffda RBX: 000000000000001b RCX: 0000000000441709 [ 43.089398] RDX: 0000000000000030 RSI: 0000000020000140 RDI: 0000000000000003 [ 43.096648] RBP: 00000000004a3318 R08: 0000000020000000 R09: 0000000000000010 [ 43.103892] R10: 0000000000000000 R11: 0000000000000217 R12: 00007ffffde4d768 [ 43.111138] R13: 0000000000402490 R14: 0000000000000000 R15: 0000000000000000 [ 43.118818] Dumping ftrace buffer: [ 43.122332] (ftrace buffer empty) [ 43.126016] Kernel Offset: disabled [ 43.129615] Rebooting in 86400 seconds..