INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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 'ci-upstream-mmots-kasan-gce-9,10.128.0.53' (ECDSA) to the list of known hosts. 2017/09/15 18:58:03 parsed 1 programs 2017/09/15 18:58:03 executed programs: 0 syzkaller login: [ 95.437079] ------------[ cut here ]------------ [ 95.441926] kernel BUG at ./include/linux/skbuff.h:2081! [ 95.447558] invalid opcode: 0000 [#1] SMP KASAN [ 95.452209] Dumping ftrace buffer: [ 95.455724] (ftrace buffer empty) [ 95.459409] Modules linked in: [ 95.462586] CPU: 1 PID: 4010 Comm: syz-executor0 Not tainted 4.13.0-mm1+ #7 [ 95.469669] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.478994] task: ffff8801c8ed8540 task.stack: ffff8801c93b0000 [ 95.485033] RIP: 0010:__ip6_make_skb+0x18cf/0x1f70 [ 95.489926] RSP: 0018:ffff8801c93b7530 EFLAGS: 00010297 [ 95.495256] RAX: ffff8801c8ed8540 RBX: 0000000000000028 RCX: 0000000000000001 [ 95.502494] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801c8ffd560 [ 95.509739] RBP: ffff8801c93b7740 R08: ffff8801c8800bfc R09: 0000000000000000 [ 95.516977] R10: ffff8801c93b7760 R11: 0000000000000000 R12: ffff8801c8800c08 [ 95.524216] R13: ffff8801c8800b80 R14: 0000000000002008 R15: dffffc0000000000 [ 95.531456] FS: 00007fade7f0d700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 95.539649] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 95.545500] CR2: 00007fade7eebdb8 CR3: 00000001c8ffc000 CR4: 00000000001406e0 [ 95.552739] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 95.559993] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 95.567234] Call Trace: [ 95.569800] ? ip6_output+0x850/0x850 [ 95.573571] ? match_held_lock+0x9b1/0x9f0 [ 95.577788] ? lock_acquire+0x1d5/0x580 [ 95.581735] ? udpv6_sendmsg+0x9b1/0x3380 [ 95.585864] udp_v6_push_pending_frames+0x261/0x3a0 [ 95.590859] ? udp_v6_push_pending_frames+0x261/0x3a0 [ 95.596026] ? udp_v6_send_skb+0xe70/0xe70 [ 95.600233] ? ip6_append_data+0x189/0x290 [ 95.604459] udpv6_sendmsg+0x2a2b/0x3380 [ 95.608491] ? ip_reply_glue_bits+0xb0/0xb0 [ 95.612785] ? udpv6_setsockopt+0x80/0x80 [ 95.616903] ? lock_release+0xd70/0xd70 [ 95.620844] ? check_noncircular+0x20/0x20 [ 95.625057] ? __fget+0x362/0x580 [ 95.628478] ? finish_task_switch+0x1d3/0x740 [ 95.632943] ? find_held_lock+0x39/0x1d0 [ 95.636976] ? lock_downgrade+0x990/0x990 [ 95.641090] ? lock_release+0xd70/0xd70 [ 95.645041] ? __might_fault+0xe0/0x1d0 [ 95.648984] ? sock_has_perm+0x29c/0x400 [ 95.653017] ? selinux_tun_dev_create+0xc0/0xc0 [ 95.657665] ? lock_release+0xd70/0xd70 [ 95.661623] ? check_same_owner+0x320/0x320 [ 95.665920] ? __check_object_size+0x25d/0x4f0 [ 95.670482] inet_sendmsg+0x11f/0x5e0 [ 95.674259] ? inet_sendmsg+0x11f/0x5e0 [ 95.678203] ? __might_sleep+0x95/0x190 [ 95.682157] ? inet_recvmsg+0x5f0/0x5f0 [ 95.686102] ? selinux_socket_sendmsg+0x36/0x40 [ 95.690738] ? security_socket_sendmsg+0x89/0xb0 [ 95.695472] ? inet_recvmsg+0x5f0/0x5f0 [ 95.699416] sock_sendmsg+0xca/0x110 [ 95.703102] SYSC_sendto+0x358/0x5a0 [ 95.706791] ? SYSC_connect+0x480/0x480 [ 95.710743] ? selinux_netlbl_socket_setsockopt+0x10c/0x460 [ 95.716437] ? exit_to_usermode_loop+0x98/0x300 [ 95.721086] ? trace_hardirqs_off+0xd/0x10 [ 95.725291] ? exit_to_usermode_loop+0x1a8/0x300 [ 95.730033] ? do_futex+0x2130/0x2130 [ 95.733812] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 95.738624] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 95.743613] SyS_sendto+0x40/0x50 [ 95.747038] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 95.751759] RIP: 0033:0x451e59 [ 95.754917] RSP: 002b:00007fade7f0cc08 EFLAGS: 00000216 ORIG_RAX: 000000000000002c [ 95.762593] RAX: ffffffffffffffda RBX: 00000000007180b0 RCX: 0000000000451e59 [ 95.769831] RDX: 0000000000000000 RSI: 0000000020f5b000 RDI: 0000000000000003 [ 95.777072] RBP: 0000000000000082 R08: 0000000020f5afe4 R09: 000000000000001c [ 95.784309] R10: 0000000000000800 R11: 0000000000000216 R12: 00000000004baffc [ 95.791545] R13: 00000000ffffffff R14: 0000000000000003 R15: 0000000000000029 [ 95.798800] Code: d2 75 fd e9 c5 e8 ff ff e8 4f d2 75 fd e9 4a ea ff ff 48 89 f7 e8 22 d2 75 fd e9 aa eb ff ff e8 b8 0d 41 fd 0f 0b e8 b1 0d 41 fd <0f> 0b 49 8d 45 78 4d 8d 45 7c 48 89 85 78 fe ff ff 49 8d 85 ba [ 95.817880] RIP: __ip6_make_skb+0x18cf/0x1f70 RSP: ffff8801c93b7530 [ 95.829377] ---[ end trace 06fa0720e604334e ]--- [ 95.834443] Kernel panic - not syncing: Fatal exception [ 95.840202] Dumping ftrace buffer: [ 95.843711] (ftrace buffer empty) [ 95.847393] Kernel Offset: disabled [ 95.850995] Rebooting in 86400 seconds..