executing program
syzkaller login: [   16.055124] kasan: CONFIG_KASAN_INLINE enabled
[   16.055590] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   16.056522] general protection fault: 0000 [#1] SMP KASAN
[   16.057085] Dumping ftrace buffer:
[   16.057451]    (ftrace buffer empty)
[   16.057844] Modules linked in:
[   16.058176] CPU: 1 PID: 2940 Comm: syzkaller097174 Not tainted 4.13.0-rc4-next-20170811 #1
[   16.058961] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[   16.059727] task: ffff88006cc7c540 task.stack: ffff88006b690000
[   16.060314] RIP: 0010:__skb_flow_dissect+0xdcd/0x3ae0
[   16.060791] RSP: 0018:ffff88006b697340 EFLAGS: 00010206
[   16.061388] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   16.062082] RDX: 0000000000000060 RSI: ffffffff856dc080 RDI: 0000000000000300
[   16.062749] RBP: ffff88006b697870 R08: 0000000000000000 R09: 0000000000000000
[   16.063451] R10: 0000000000000008 R11: ffffed000d6d2f1e R12: 0000000000000000
[   16.064167] R13: 0000000000000000 R14: ffffffff856dc080 R15: ffff88003d9d6840
[   16.064835] FS:  000000000164b880(0000) GS:ffff88003fd00000(0000) knlGS:0000000000000000
[   16.065763] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   16.066457] CR2: 0000000020008000 CR3: 000000003e268000 CR4: 00000000000006e0
[   16.067336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   16.068116] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   16.068787] Call Trace:
[   16.069523]  ? __lock_acquire+0x6aa/0x3bc0
[   16.069896]  ? unix_seqpacket_sendmsg+0xf3/0x160
[   16.070448]  ? sock_sendmsg+0xca/0x110
[   16.070823]  ? SYSC_sendto+0x352/0x5a0
[   16.071215]  ? SyS_sendto+0x40/0x50
[   16.071583]  ? __skb_flow_get_ports+0x400/0x400
[   16.072073]  ? debug_check_no_locks_freed+0x3c0/0x3c0
[   16.072539]  ? check_same_owner+0x320/0x320
[   16.072968]  ? rcu_pm_notify+0xc0/0xc0
[   16.073357]  ? rcu_read_lock_sched_held+0x108/0x120
[   16.073811]  ? kmem_cache_alloc_node_trace+0x323/0x710
[   16.074332]  ? kasan_unpoison_shadow+0x35/0x50
[   16.074752]  ? kasan_kmalloc+0xaa/0xd0
[   16.075105]  ? __kmalloc_node_track_caller+0x47/0x70
[   16.075563]  ? memset+0x31/0x40
[   16.075859]  ? __alloc_skb+0x548/0x740
[   16.076244]  ? skb_copy_and_csum_dev+0x360/0x360
[   16.076669]  ? lock_release+0xa40/0xa40
[   16.077032]  ? __free_insn_slot+0x5c0/0x5c0
[   16.077449]  ? debug_check_no_locks_freed+0x3c0/0x3c0
[   16.077935]  ? is_bpf_text_address+0xa4/0x120
[   16.078344]  ? __kernel_text_address+0xae/0xe0
[   16.078761]  ? refcount_add_not_zero+0x133/0x200
[   16.079190]  ? refcount_dec_if_one+0x20/0x20
[   16.079587]  ? selinux_socket_sock_rcv_skb+0x388/0x870
[   16.080094]  ? check_noncircular+0x20/0x20
[   16.080522]  skb_get_poff+0x9a/0x1a0
[   16.080855]  ? __skb_get_poff+0x2c0/0x2c0
[   16.081281]  ? __lock_is_held+0xb6/0x140
[   16.081669]  __skb_get_pay_offset+0x15/0x20
[   16.082063]  ? sk_filter_trim_cap+0x329/0x9b0
[   16.082503]  ? xdp_is_valid_access+0x100/0x100
[   16.082915]  ? unix_scm_to_skb+0x22a/0x6f0
[   16.083325]  ? skb_copy_datagram_from_iter+0x3a5/0x5a0
[   16.083807]  ? unix_dgram_sendmsg+0x786/0x1600
[   16.084261]  ? find_held_lock+0x35/0x1d0
[   16.084631]  ? unix_shutdown+0x870/0x870
[   16.085095]  ? check_same_owner+0x320/0x320
[   16.085614]  ? __check_object_size+0x268/0x500
[   16.086064]  ? unix_seqpacket_sendmsg+0xf3/0x160
[   16.086520]  ? unix_dgram_sendmsg+0x1600/0x1600
[   16.086971]  ? sock_sendmsg+0xca/0x110
[   16.087382]  ? SYSC_sendto+0x352/0x5a0
[   16.087766]  ? SYSC_connect+0x470/0x470
[   16.088199]  ? selinux_netlbl_socket_setsockopt+0x10c/0x460
[   16.088798]  ? retint_kernel+0x10/0x10
[   16.089251]  ? security_socket_setsockopt+0x89/0xb0
[   16.089766]  ? syscall_return_slowpath+0x2b3/0x500
[   16.090273]  ? prepare_exit_to_usermode+0x2c0/0x2c0
[   16.091171]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   16.091637]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   16.092146]  ? SyS_sendto+0x40/0x50
[   16.092499]  ? entry_SYSCALL_64_fastpath+0x1f/0xbe
[   16.092935] 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 
[   16.094970] RIP: __skb_flow_dissect+0xdcd/0x3ae0 RSP: ffff88006b697340
[   16.095700] ---[ end trace e3a89672ac5df2e5 ]---
[   16.096212] Kernel panic - not syncing: Fatal exception
[   16.096749] Dumping ftrace buffer:
[   16.097113]    (ftrace buffer empty)
[   16.097496] Kernel Offset: disabled
[   16.097858] Rebooting in 86400 seconds..