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-next-kasan-gce-1,10.128.0.17' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   25.850939] kasan: CONFIG_KASAN_INLINE enabled
[   25.851729] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   25.852879] general protection fault: 0000 [#1] SMP KASAN
[   25.853666] Dumping ftrace buffer:
[   25.854141]    (ftrace buffer empty)
[   25.854636] Modules linked in:
[   25.855070] CPU: 0 PID: 2940 Comm: syzkaller872007 Not tainted 4.13.0-rc4-next-20170811 #1
[   25.856232] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   25.857622] task: ffff8801d1b425c0 task.stack: ffff8801d0bc0000
[   25.858495] RIP: 0010:__skb_flow_dissect+0xdcd/0x3ae0
[   25.859209] RSP: 0018:ffff8801d0bc7340 EFLAGS: 00010206
[   25.859944] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   25.860924] RDX: 0000000000000060 RSI: ffffffff856dc080 RDI: 0000000000000300
[   25.861904] RBP: ffff8801d0bc7870 R08: 0000000000000000 R09: 0000000000000000
[   25.862854] R10: 0000000000000008 R11: ffffed003a178f1e R12: 0000000000000000
[   25.863806] R13: 0000000000000000 R14: ffffffff856dc080 R15: ffff8801ce223140
[   25.864786] FS:  00000000016ed880(0000) GS:ffff8801dc000000(0000) knlGS:0000000000000000
[   25.865904] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.866700] CR2: 0000000020008000 CR3: 00000001ce22d000 CR4: 00000000001406f0
[   25.867751] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   25.868823] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   25.869824] Call Trace:
[   25.870214]  ? __lock_acquire+0x6aa/0x3bc0
[   25.870883]  ? unix_seqpacket_sendmsg+0xf3/0x160
[   25.871526]  ? sock_sendmsg+0xca/0x110
[   25.875378]  ? SYSC_sendto+0x352/0x5a0
[   25.879229]  ? SyS_sendto+0x40/0x50
[   25.882833]  ? __skb_flow_get_ports+0x400/0x400
[   25.887473]  ? debug_check_no_locks_freed+0x3c0/0x3c0
[   25.892629]  ? check_same_owner+0x320/0x320
[   25.896918]  ? rcu_pm_notify+0xc0/0xc0
[   25.900785]  ? rcu_read_lock_sched_held+0x108/0x120
[   25.905766]  ? kmem_cache_alloc_node_trace+0x323/0x710
[   25.911008]  ? kasan_unpoison_shadow+0x35/0x50
[   25.915554]  ? kasan_kmalloc+0xaa/0xd0
[   25.919413]  ? __kmalloc_node_track_caller+0x47/0x70
[   25.924483]  ? memset+0x31/0x40
[   25.927729]  ? __alloc_skb+0x548/0x740
[   25.931584]  ? skb_copy_and_csum_dev+0x360/0x360
[   25.936306]  ? lock_release+0xa40/0xa40
[   25.940245]  ? __free_insn_slot+0x5c0/0x5c0
[   25.944538]  ? debug_check_no_locks_freed+0x3c0/0x3c0
[   25.949702]  ? is_bpf_text_address+0xa4/0x120
[   25.954167]  ? __kernel_text_address+0xae/0xe0
[   25.958724]  ? refcount_add_not_zero+0x133/0x200
[   25.963444]  ? refcount_dec_if_one+0x20/0x20
[   25.967823]  ? selinux_socket_sock_rcv_skb+0x388/0x870
[   25.973069]  ? check_noncircular+0x20/0x20
[   25.977274]  skb_get_poff+0x9a/0x1a0
[   25.980963]  ? __skb_get_poff+0x2c0/0x2c0
[   25.985078]  ? __lock_is_held+0xb6/0x140
[   25.989106]  __skb_get_pay_offset+0x15/0x20
[   25.993397]  ? sk_filter_trim_cap+0x329/0x9b0
[   25.997861]  ? xdp_is_valid_access+0x100/0x100
[   26.002408]  ? unix_scm_to_skb+0x22a/0x6f0
[   26.006630]  ? skb_copy_datagram_from_iter+0x3a5/0x5a0
[   26.011878]  ? unix_dgram_sendmsg+0x786/0x1600
[   26.016433]  ? find_held_lock+0x35/0x1d0
[   26.020464]  ? unix_shutdown+0x870/0x870
[   26.024490]  ? check_same_owner+0x320/0x320
[   26.028785]  ? __check_object_size+0x268/0x500
[   26.033342]  ? unix_seqpacket_sendmsg+0xf3/0x160
[   26.038063]  ? unix_dgram_sendmsg+0x1600/0x1600
[   26.042698]  ? sock_sendmsg+0xca/0x110
[   26.046557]  ? SYSC_sendto+0x352/0x5a0
[   26.050411]  ? SYSC_connect+0x470/0x470
[   26.054350]  ? selinux_netlbl_socket_setsockopt+0x10c/0x460
[   26.060030]  ? retint_kernel+0x10/0x10
[   26.063888]  ? security_socket_setsockopt+0x89/0xb0
[   26.068872]  ? syscall_return_slowpath+0x2b3/0x500
[   26.073766]  ? prepare_exit_to_usermode+0x2c0/0x2c0
[   26.078746]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   26.083552]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   26.088532]  ? SyS_sendto+0x40/0x50
[   26.092124]  ? entry_SYSCALL_64_fastpath+0x1f/0xbe
[   26.097021] Code: 80 3c 02 00 44 89 6d 10 0f 85 44 2b 00 00 4d 8b 67 20 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 00 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 13 2b 00 00 4d 8b a4 24 00 03 00 00 4d 85 e4 
[   26.116082] RIP: __skb_flow_dissect+0xdcd/0x3ae0 RSP: ffff8801d0bc7340
[   26.122770] ---[ end trace d7e199f90825e3b5 ]---
[   26.127512] Kernel panic - not syncing: Fatal exception
[   26.133226] Dumping ftrace buffer:
[   26.136741]    (ftrace buffer empty)
[   26.140416] Kernel Offset: disabled
[   26.144009] Rebooting in 86400 seconds..