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 'ci-upstream-kasan-gce-5,10.128.0.60' (ECDSA) to the list of known hosts.
net.ipv6.conf.syz0.accept_dad = 0
net.ipv6.conf.syz0.router_solicitations = 0
executing program
syzkaller login: [   43.928308] syz0: caps=(0x00000800000058c1, 0x0000000000000000) len=4203 data_len=2810 gso_size=8465 gso_type=5 ip_summed=0
[   43.931968] ------------[ cut here ]------------
[   43.933471] WARNING: CPU: 1 PID: 3004 at net/core/dev.c:2592 skb_warn_bad_offload+0x2a9/0x380
[   43.936038] Kernel panic - not syncing: panic_on_warn set ...
[   43.936038] 
[   43.938118] CPU: 1 PID: 3004 Comm: syzkaller621243 Not tainted 4.13.0-rc5+ #42
[   43.940395] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   43.943174] Call Trace:
[   43.943886]  dump_stack+0x194/0x257
[   43.944939]  ? arch_local_irq_restore+0x53/0x53
[   43.946434]  panic+0x1e4/0x417
[   43.947336]  ? __warn+0x1d9/0x1d9
[   43.948449]  ? show_regs_print_info+0x65/0x65
[   43.952979]  ? skb_warn_bad_offload+0x2a9/0x380
[   43.957624]  __warn+0x1c4/0x1d9
[   43.960879]  ? skb_warn_bad_offload+0x2a9/0x380
[   43.965548]  report_bug+0x211/0x2d0
[   43.969159]  fixup_bug+0x40/0x90
[   43.972510]  do_trap+0x260/0x390
[   43.975857]  do_error_trap+0x120/0x390
[   43.979725]  ? do_trap+0x390/0x390
[   43.983240]  ? skb_warn_bad_offload+0x2a9/0x380
[   43.988080]  ? vprintk_emit+0x3ea/0x590
[   43.992038]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   43.996861]  do_invalid_op+0x1b/0x20
[   44.000551]  invalid_op+0x1e/0x30
[   44.003976] RIP: 0010:skb_warn_bad_offload+0x2a9/0x380
[   44.009251] RSP: 0018:ffff8801d165f0a0 EFLAGS: 00010282
[   44.014588] RAX: 000000000000006f RBX: ffff8801d00ba568 RCX: 0000000000000000
[   44.021863] RDX: 000000000000006f RSI: 1ffff1003a2cbdd4 RDI: ffffed003a2cbe08
[   44.029106] RBP: ffff8801d165f0f8 R08: 0000000000000001 R09: 0000000000000000
[   44.036351] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d0170340
[   44.043594] R13: 0000000000000000 R14: ffff8801d0170340 R15: 0000000000002111
[   44.050904]  __skb_gso_segment+0x612/0x800
[   44.055118]  ? skb_mac_gso_segment+0x660/0x660
[   44.059682]  ? sch_direct_xmit+0xc0/0x6d0
[   44.063810]  validate_xmit_skb+0x4ba/0xb20
[   44.068025]  ? netif_skb_features+0x8e0/0x8e0
[   44.072511]  ? lock_acquire+0x1d5/0x580
[   44.076474]  validate_xmit_skb_list+0xb7/0x120
[   44.081036]  sch_direct_xmit+0x3b6/0x6d0
[   44.085079]  ? dev_deactivate_queue.constprop.27+0x260/0x260
[   44.090862]  __dev_queue_xmit+0x15fe/0x1e40
[   44.095158]  ? __might_fault+0x110/0x1d0
[   44.099205]  ? netdev_pick_tx+0x300/0x300
[   44.103334]  ? __might_fault+0x110/0x1d0
[   44.107383]  ? check_same_owner+0x320/0x320
[   44.111680]  ? _copy_from_iter+0x367/0xf30
[   44.115903]  ? kasan_check_write+0x14/0x20
[   44.120109]  ? copyin+0x91/0xb0
[   44.123380]  ? skb_copy_datagram_from_iter+0x3a5/0x5a0
[   44.128643]  dev_queue_xmit+0x17/0x20
[   44.132420]  packet_sendmsg+0x3ac6/0x6060
[   44.136546]  ? __mem_cgroup_threshold+0x8f0/0x8f0
[   44.141366]  ? mark_held_locks+0xaf/0x100
[   44.145520]  ? packet_cached_dev_get+0x2b0/0x2b0
[   44.150259]  ? lock_release+0xa40/0xa40
[   44.154208]  ? check_same_owner+0x320/0x320
[   44.158526]  ? __check_object_size+0x25d/0x4f0
[   44.163099]  ? __might_sleep+0x95/0x190
[   44.167083]  ? kasan_check_write+0x14/0x20
[   44.171319]  ? _copy_from_user+0x99/0x110
[   44.175446]  ? find_held_lock+0x35/0x1d0
[   44.179487]  ? sock_has_perm+0x29c/0x400
[   44.183568]  ? selinux_tun_dev_create+0xc0/0xc0
[   44.188210]  ? _copy_from_iter+0x93/0xf30
[   44.192364]  ? lock_release+0xa40/0xa40
[   44.196359]  ? security_socket_sendmsg+0x89/0xb0
[   44.201090]  ? packet_cached_dev_get+0x2b0/0x2b0
[   44.205824]  sock_sendmsg+0xca/0x110
[   44.209534]  ___sys_sendmsg+0x755/0x890
[   44.213489]  ? copy_msghdr_from_user+0x590/0x590
[   44.218247]  ? check_noncircular+0x20/0x20
[   44.222459]  ? __pmd_alloc+0x4e0/0x4e0
[   44.226382]  ? __fdget+0x18/0x20
[   44.229732]  __sys_sendmsg+0xe5/0x210
[   44.233516]  ? __sys_sendmsg+0xe5/0x210
[   44.237472]  ? SyS_shutdown+0x290/0x290
[   44.241426]  ? handle_mm_fault+0x4a2/0x860
[   44.245641]  ? down_read_trylock+0xdb/0x170
[   44.249940]  ? __handle_mm_fault+0x3860/0x3860
[   44.254493]  ? vmacache_find+0x61/0x270
[   44.258463]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   44.263471]  SyS_sendmsg+0x2d/0x50
[   44.266988]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   44.271717] RIP: 0033:0x445489
[   44.274882] RSP: 002b:00000000007efe68 EFLAGS: 00000217 ORIG_RAX: 000000000000002e
[   44.282564] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445489
[   44.289832] RDX: 0000000000004010 RSI: 00000000207fcfc8 RDI: 0000000000000004
[   44.297078] RBP: 0000000000000086 R08: 000000000000cdf3 R09: 000000000000cdf3
[   44.304320] R10: 0000000000000004 R11: 0000000000000217 R12: 0000000000402ae0
[   44.311564] R13: 0000000000402b70 R14: 0000000000000000 R15: 0000000000000000
[   44.318991] Dumping ftrace buffer:
[   44.322560]    (ftrace buffer empty)
[   44.326247] Kernel Offset: disabled
[   44.329852] Rebooting in 86400 seconds..