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-next-kasan-gce-4,10.128.0.42' (ECDSA) to the list of known hosts. 2017/08/15 01:28:38 parsed 1 programs 2017/08/15 01:28:38 executed programs: 0 2017/08/15 01:28:43 executed programs: 887 2017/08/15 01:28:48 executed programs: 1645 syzkaller login: [ 76.192810] ------------[ cut here ]------------ [ 76.194336] kernel BUG at ./include/linux/skbuff.h:2064! [ 76.206207] invalid opcode: 0000 [#1] SMP KASAN [ 76.207180] Dumping ftrace buffer: [ 76.207667] (ftrace buffer empty) [ 76.208206] Modules linked in: [ 76.208666] CPU: 1 PID: 9738 Comm: syz-executor6 Not tainted 4.13.0-rc4-next-20170811 #2 [ 76.209854] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.211208] task: ffff8801cebb8780 task.stack: ffff8801c02c8000 [ 76.212024] RIP: 0010:__ip6_make_skb+0x18cf/0x1f70 [ 76.212706] RSP: 0018:ffff8801c02cf570 EFLAGS: 00010297 [ 76.215188] RAX: ffff8801cebb8780 RBX: 0000000000000028 RCX: 0000000000000001 [ 76.222435] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801d4bd1620 [ 76.229688] RBP: ffff8801c02cf780 R08: ffff8801cf4e7afc R09: 0000000000000000 [ 76.236940] R10: ffff8801c02cf7a0 R11: 0000000000000000 R12: ffff8801cf4e7b08 [ 76.244191] R13: ffff8801cf4e7a80 R14: 0000000000002008 R15: dffffc0000000000 [ 76.251446] FS: 00007f0c8df2b700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 76.259653] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.265515] CR2: 0000000020dc4000 CR3: 00000001bf1f3000 CR4: 00000000001406e0 [ 76.272768] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.280018] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.287263] Call Trace: [ 76.289826] ? ip6_output+0x840/0x840 [ 76.293606] ? lock_acquire+0x1d5/0x580 [ 76.297550] ? __lock_sock+0x1e4/0x2f0 [ 76.301414] ? lock_downgrade+0x990/0x990 [ 76.305538] ? lock_acquire+0x1d5/0x580 [ 76.309484] ? lock_sock_nested+0xa3/0x110 [ 76.313695] ? lock_acquire+0x1d5/0x580 [ 76.317646] ? udpv6_sendmsg+0x9a3/0x31a0 [ 76.321765] udp_v6_push_pending_frames+0x255/0x390 [ 76.326748] ? udp_v6_push_pending_frames+0x255/0x390 [ 76.331904] ? udp_v6_send_skb+0xe70/0xe70 [ 76.336109] ? ip6_append_data+0x189/0x290 [ 76.340313] ? ip_reply_glue_bits+0xb0/0xb0 [ 76.344602] udpv6_sendmsg+0x280d/0x31a0 [ 76.348627] ? ip_reply_glue_bits+0xb0/0xb0 [ 76.352932] ? udpv6_destroy_sock+0xd0/0xd0 [ 76.357224] ? __lock_is_held+0xb6/0x140 [ 76.361254] ? check_noncircular+0x20/0x20 [ 76.365455] ? __fget+0x35c/0x570 [ 76.368884] ? iterate_fd+0x3f0/0x3f0 [ 76.372670] ? do_futex+0x781/0x20a0 [ 76.376373] ? find_held_lock+0x35/0x1d0 [ 76.380428] ? __might_fault+0x110/0x1d0 [ 76.384476] ? sock_has_perm+0x29c/0x400 [ 76.388514] ? lock_downgrade+0x990/0x990 [ 76.392633] ? selinux_tun_dev_create+0xc0/0xc0 [ 76.397277] ? lock_release+0xa40/0xa40 [ 76.401218] ? check_same_owner+0x320/0x320 [ 76.405507] ? __check_object_size+0x25d/0x4f0 [ 76.410059] inet_sendmsg+0x11f/0x5e0 [ 76.413831] ? inet_sendmsg+0x11f/0x5e0 [ 76.417775] ? __might_sleep+0x95/0x190 [ 76.421715] ? inet_recvmsg+0x5f0/0x5f0 [ 76.425656] ? selinux_socket_sendmsg+0x36/0x40 [ 76.430290] ? security_socket_sendmsg+0x89/0xb0 [ 76.435013] ? inet_recvmsg+0x5f0/0x5f0 [ 76.438964] sock_sendmsg+0xca/0x110 [ 76.442642] SYSC_sendto+0x352/0x5a0 [ 76.446321] ? SYSC_connect+0x470/0x470 [ 76.450268] ? selinux_netlbl_socket_setsockopt+0x10c/0x460 [ 76.455945] ? exit_to_usermode_loop+0x98/0x300 [ 76.460583] ? trace_hardirqs_off+0xd/0x10 [ 76.464783] ? exit_to_usermode_loop+0x1a8/0x300 [ 76.469527] ? do_futex+0x20a0/0x20a0 [ 76.473305] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 76.478115] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 76.483104] SyS_sendto+0x40/0x50 [ 76.486531] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 76.491258] RIP: 0033:0x4512e9 [ 76.494423] RSP: 002b:00007f0c8df2ac08 EFLAGS: 00000216 ORIG_RAX: 000000000000002c [ 76.502107] RAX: ffffffffffffffda RBX: 00000000007180a8 RCX: 00000000004512e9 [ 76.509342] RDX: 0000000000000000 RSI: 0000000020f5b000 RDI: 0000000000000003 [ 76.516576] RBP: 0000000000000086 R08: 0000000020f5afe4 R09: 000000000000001c [ 76.523811] R10: 0000000000000800 R11: 0000000000000216 R12: 00000000004ba33f [ 76.531045] R13: 00000000ffffffff R14: 0000000000000003 R15: 0000000000000029 [ 76.538288] Code: d1 77 fd e9 c5 e8 ff ff e8 af d1 77 fd e9 4a ea ff ff 48 89 f7 e8 82 d1 77 fd e9 aa eb ff ff e8 08 d1 43 fd 0f 0b e8 01 d1 43 fd <0f> 0b 49 8d 45 78 4d 8d 45 7c 48 89 85 78 fe ff ff 49 8d 85 ba [ 76.557358] RIP: __ip6_make_skb+0x18cf/0x1f70 RSP: ffff8801c02cf570 [ 76.563844] ---[ end trace aadfecda095d2c8d ]--- [ 76.568882] Kernel panic - not syncing: Fatal exception [ 76.574543] Dumping ftrace buffer: [ 76.578054] (ftrace buffer empty) [ 76.581728] Kernel Offset: disabled [ 76.585322] Rebooting in 86400 seconds..