Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [  286.367465] random: crng init done
2017/08/15 00:57:57 parsed 1 programs
2017/08/15 00:57:57 executed programs: 0
2017/08/15 00:58:02 executed programs: 1052
2017/08/15 00:58:07 executed programs: 2257
2017/08/15 00:58:12 executed programs: 3362
2017/08/15 00:58:17 executed programs: 4223
2017/08/15 00:58:22 executed programs: 5080
[  929.281819] ------------[ cut here ]------------
[  929.282367] kernel BUG at ./include/linux/skbuff.h:2064!
[  929.282944] invalid opcode: 0000 [#1] SMP KASAN
[  929.283518] Dumping ftrace buffer:
[  929.284292]    (ftrace buffer empty)
[  929.284820] Modules linked in:
[  929.285295] CPU: 2 PID: 18497 Comm: syz-executor0 Not tainted 4.13.0-rc4-next-20170811 #2
[  929.286780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[  929.287833] task: ffff880038db2100 task.stack: ffff88003bed0000
[  929.288486] RIP: 0010:__ip6_make_skb+0x18cf/0x1f70
[  929.289275] RSP: 0018:ffff88003bed7570 EFLAGS: 00010297
[  929.289892] RAX: ffff880038db2100 RBX: 0000000000000028 RCX: 0000000000000001
[  929.290828] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88006a0fb4e0
[  929.291588] RBP: ffff88003bed7780 R08: ffff8800670c79bc R09: 0000000000000000
[  929.292311] R10: ffff88003bed77a0 R11: 0000000000000000 R12: ffff8800670c79c8
[  929.293047] R13: ffff8800670c7940 R14: 0000000000002008 R15: dffffc0000000000
[  929.293777] FS:  00007ff165c94700(0000) GS:ffff88006de00000(0000) knlGS:0000000000000000
[  929.294601] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  929.295202] CR2: 00000000006e8740 CR3: 000000006a3bd000 CR4: 00000000000006e0
[  929.295941] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  929.296698] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  929.297435] Call Trace:
[  929.297715]  ? ip6_output+0x840/0x840
[  929.298106]  ? futex_wait_queue_me+0x4c1/0x7e0
[  929.298574]  ? refill_pi_state_cache.part.6+0x2f0/0x2f0
[  929.299126]  ? lock_acquire+0x1d5/0x580
[  929.299529]  ? lock_sock_nested+0xa3/0x110
[  929.299962]  ? lock_acquire+0x1d5/0x580
[  929.300411]  ? udpv6_sendmsg+0x9a3/0x31a0
[  929.300839]  udp_v6_push_pending_frames+0x255/0x390
[  929.301465]  ? udp_v6_push_pending_frames+0x255/0x390
[  929.302092]  ? udp_v6_send_skb+0xe70/0xe70
[  929.302551]  ? ip6_append_data+0x189/0x290
[  929.303295]  ? ip_reply_glue_bits+0xb0/0xb0
[  929.303678]  udpv6_sendmsg+0x280d/0x31a0
[  929.304069]  ? ip_reply_glue_bits+0xb0/0xb0
[  929.304511]  ? lock_acquire+0x198/0x580
[  929.304925]  ? udpv6_destroy_sock+0xd0/0xd0
[  929.305373]  ? get_futex_key+0x1d50/0x1d50
[  929.305806]  ? __fget+0x35c/0x570
[  929.306160]  ? iterate_fd+0x3f0/0x3f0
[  929.306536]  ? do_futex+0x781/0x20a0
[  929.306927]  ? __fget+0x333/0x570
[  929.307279]  ? lock_downgrade+0x990/0x990
[  929.307702]  ? lock_release+0xa40/0xa40
[  929.308108]  ? lock_acquire+0x1d5/0x580
[  929.308513]  ? lock_acquire+0x1d5/0x580
[  929.308916]  ? __might_fault+0x110/0x1d0
[  929.309329]  ? sock_has_perm+0x29c/0x400
[  929.309743]  ? lock_downgrade+0x990/0x990
[  929.310184]  ? selinux_tun_dev_create+0xc0/0xc0
[  929.310634]  ? lock_release+0xa40/0xa40
[  929.311019]  ? check_same_owner+0x320/0x320
[  929.311464]  ? __check_object_size+0x25d/0x4f0
[  929.311933]  inet_sendmsg+0x11f/0x5e0
[  929.312349]  ? inet_sendmsg+0x11f/0x5e0
[  929.312752]  ? __might_sleep+0x95/0x190
[  929.313158]  ? inet_recvmsg+0x5f0/0x5f0
[  929.313570]  ? selinux_socket_sendmsg+0x36/0x40
[  929.314060]  ? security_socket_sendmsg+0x89/0xb0
[  929.314545]  ? inet_recvmsg+0x5f0/0x5f0
[  929.314959]  sock_sendmsg+0xca/0x110
[  929.315317]  SYSC_sendto+0x352/0x5a0
[  929.315566]  ? SYSC_connect+0x470/0x470
[  929.315832]  ? selinux_netlbl_socket_setsockopt+0x10c/0x460
[  929.316225]  ? ipv6_setsockopt+0xd7/0x150
[  929.316499]  ? ipv6_setsockopt+0xa8/0x150
[  929.316781]  ? do_futex+0x20a0/0x20a0
[  929.317046]  ? preempt_notifier_dec+0x20/0x20
[  929.317350]  SyS_sendto+0x40/0x50
[  929.317584]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[  929.317900] RIP: 0033:0x446739
[  929.318184] RSP: 002b:00007ff165c93c08 EFLAGS: 00000286 ORIG_RAX: 000000000000002c
[  929.318701] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000446739
[  929.319270] RDX: 0000000000000000 RSI: 0000000020f5b000 RDI: 0000000000000003
[  929.319859] RBP: 0000000000a5f870 R08: 0000000020f5afe4 R09: 000000000000001c
[  929.320450] R10: 0000000000000800 R11: 0000000000000286 R12: 0000000000000000
[  929.321042] R13: 0000000000000000 R14: 00007ff165c949c0 R15: 00007ff165c94700
[  929.321637] 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 
[  929.323403] RIP: __ip6_make_skb+0x18cf/0x1f70 RSP: ffff88003bed7570
[  929.324730] ---[ end trace 9cf6423774978682 ]---
[  929.327752] Kernel panic - not syncing: Fatal exception
[  929.328520] Dumping ftrace buffer:
[  929.328898]    (ftrace buffer empty)
[  929.329293] Kernel Offset: disabled
[  929.329697] Rebooting in 86400 seconds..