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-net-kasan-gce-7,10.128.0.49' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   51.588254] kasan: CONFIG_KASAN_INLINE enabled
[   51.589073] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   51.590379] general protection fault: 0000 [#1] SMP KASAN
[   51.591325] Dumping ftrace buffer:
[   51.591817]    (ftrace buffer empty)
[   51.592315] Modules linked in:
[   51.592800] CPU: 0 PID: 2915 Comm: syzkaller686441 Not tainted 4.13.0-rc4+ #1
[   51.593849] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.595176] task: ffff8801d1f92500 task.stack: ffff8801d26c0000
[   51.596004] RIP: 0010:__skb_flow_dissect+0xdcd/0x3ae0
[   51.596748] RSP: 0018:ffff8801d26c7340 EFLAGS: 00010206
[   51.597518] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   51.598570] RDX: 0000000000000060 RSI: ffffffff85705c60 RDI: 0000000000000300
[   51.599709] RBP: ffff8801d26c7870 R08: 0000000000000000 R09: 0000000000000000
[   51.600677] R10: 0000000000000008 R11: ffffed003a4d8f1e R12: 0000000000000000
[   51.601666] R13: 0000000000000000 R14: ffffffff85705c60 R15: ffff8801d3b50d40
[   51.602677] FS:  00000000012cc880(0000) GS:ffff8801dc000000(0000) knlGS:0000000000000000
[   51.603836] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   51.604608] CR2: 0000000020017ff6 CR3: 00000001d436c000 CR4: 00000000001406f0
[   51.605572] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   51.606524] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   51.607474] Call Trace:
[   51.607871]  ? __kmalloc_node_track_caller+0x47/0x70
[   51.608725]  ? __kmalloc_reserve.isra.41+0x41/0xd0
[   51.613618]  ? __alloc_skb+0x13b/0x740
[   51.617471]  ? alloc_skb_with_frags+0x10d/0x710
[   51.622103]  ? sock_alloc_send_pskb+0x7b4/0x9d0
[   51.626737]  ? unix_dgram_sendmsg+0x52d/0x1600
[   51.631299]  ? unix_seqpacket_sendmsg+0xf3/0x160
[   51.636022]  ? sock_sendmsg+0xca/0x110
[   51.639877]  ? SYSC_sendto+0x352/0x5a0
[   51.643819]  ? SyS_sendto+0x40/0x50
[   51.647417]  ? __skb_flow_get_ports+0x400/0x400
[   51.652065]  ? __lock_acquire+0x6ef/0x3dc0
[   51.656269]  ? check_same_owner+0x320/0x320
[   51.660555]  ? rcu_pm_notify+0xc0/0xc0
[   51.664427]  ? debug_check_no_locks_freed+0x3c0/0x3c0
[   51.669586]  ? rcu_read_lock_sched_held+0x108/0x120
[   51.674578]  ? kmem_cache_alloc_node_trace+0x323/0x710
[   51.679831]  ? kasan_unpoison_shadow+0x35/0x50
[   51.684377]  ? kasan_kmalloc+0xaa/0xd0
[   51.688233]  ? __kmalloc_node_track_caller+0x47/0x70
[   51.693400]  ? memset+0x31/0x40
[   51.696657]  ? __alloc_skb+0x548/0x740
[   51.700514]  ? skb_copy_and_csum_dev+0x360/0x360
[   51.705238]  ? debug_check_no_locks_freed+0x2e0/0x3c0
[   51.710395]  ? lock_release+0xa40/0xa40
[   51.714340]  ? find_held_lock+0x35/0x1d0
[   51.718379]  ? refcount_add_not_zero+0x133/0x200
[   51.723189]  ? refcount_dec_if_one+0x20/0x20
[   51.727567]  ? selinux_socket_sock_rcv_skb+0x388/0x870
[   51.732830]  ? check_noncircular+0x20/0x20
[   51.737034]  skb_get_poff+0x9a/0x1a0
[   51.740713]  ? __skb_get_poff+0x2c0/0x2c0
[   51.744834]  ? __lock_is_held+0xb6/0x140
[   51.748867]  __skb_get_pay_offset+0x15/0x20
[   51.753157]  ? sk_filter_trim_cap+0x329/0x9b0
[   51.758464]  ? xdp_is_valid_access+0x100/0x100
[   51.763020]  ? unix_scm_to_skb+0x22a/0x6f0
[   51.767224]  ? skb_copy_datagram_from_iter+0x3a5/0x5a0
[   51.772472]  ? unix_dgram_sendmsg+0x786/0x1600
[   51.777029]  ? find_held_lock+0x35/0x1d0
[   51.781062]  ? unix_shutdown+0x870/0x870
[   51.785089]  ? check_same_owner+0x320/0x320
[   51.789374]  ? __check_object_size+0x268/0x500
[   51.793956]  ? unix_seqpacket_sendmsg+0xf3/0x160
[   51.798690]  ? unix_dgram_sendmsg+0x1600/0x1600
[   51.803327]  ? sock_sendmsg+0xca/0x110
[   51.807180]  ? SYSC_sendto+0x352/0x5a0
[   51.811034]  ? SYSC_connect+0x470/0x470
[   51.814978]  ? find_held_lock+0x35/0x1d0
[   51.819008]  ? lock_downgrade+0x990/0x990
[   51.823128]  ? down_read_trylock+0xdb/0x170
[   51.827416]  ? __do_page_fault+0x2b8/0xb60
[   51.831619]  ? try_to_compact_pages+0x60/0xb30
[   51.836170]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   51.840978]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   51.845963]  ? SyS_sendto+0x40/0x50
[   51.849560]  ? entry_SYSCALL_64_fastpath+0x1f/0xbe
[   51.854465] Code: 80 3c 02 00 44 89 6d 10 0f 85 0c 2a 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 db 29 00 00 4d 8b a4 24 00 03 00 00 4d 85 e4 
[   51.873547] RIP: __skb_flow_dissect+0xdcd/0x3ae0 RSP: ffff8801d26c7340
[   51.880244] ---[ end trace 72365ac32c8dd80c ]---
[   51.884979] Kernel panic - not syncing: Fatal exception
[   51.890736] Dumping ftrace buffer:
[   51.894250]    (ftrace buffer empty)
[   51.897939] Kernel Offset: disabled
[   51.901534] Rebooting in 86400 seconds..