------------[ cut here ]------------
WARNING: CPU: 2 PID: 2975 at net/core/dev.c:2585 skb_warn_bad_offload+0x2a9/0x380 net/core/dev.c:2580
Kernel panic - not syncing: panic_on_warn set ...

CPU: 2 PID: 2975 Comm: syzkaller315399 Not tainted 4.13.0-next-20170912+ #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:181
 __warn+0x1c4/0x1d9 kernel/panic.c:542
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:skb_warn_bad_offload+0x2a9/0x380 net/core/dev.c:2580
RSP: 0018:ffff88003d9170a0 EFLAGS: 00010282
RAX: 000000000000006b RBX: ffff8800694704e0 RCX: 0000000000000000
RDX: 000000000000006b RSI: 1ffff10007b22dd4 RDI: ffffed0007b22e08
RBP: ffff88003d9170f8 R08: ffff88003d916790 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff880069cb82c0
R13: 0000000000000000 R14: ffff880069cb82c0 R15: 0000000000000700
 __skb_gso_segment+0x607/0x7f0 net/core/dev.c:2791
 skb_gso_segment include/linux/netdevice.h:3951 [inline]
 validate_xmit_skb+0x4ba/0xb20 net/core/dev.c:3041
 validate_xmit_skb_list+0xb7/0x120 net/core/dev.c:3092
 sch_direct_xmit+0x3b6/0x6d0 net/sched/sch_generic.c:181
 __dev_xmit_skb net/core/dev.c:3173 [inline]
 __dev_queue_xmit+0x15fe/0x1e40 net/core/dev.c:3440
 dev_queue_xmit+0x17/0x20 net/core/dev.c:3505
 packet_snd net/packet/af_packet.c:2950 [inline]
 packet_sendmsg+0x3bbf/0x6030 net/packet/af_packet.c:2975
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2049
 __sys_sendmsg+0xe5/0x210 net/socket.c:2083
 SYSC_sendmsg net/socket.c:2094 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2090
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x43a699
RSP: 002b:00000000007dfe48 EFLAGS: 00000217 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043a699
RDX: 0000000020000000 RSI: 0000000020f18000 RDI: 0000000000000004
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000217 R12: 0000000000000000
R13: 0000000000402c60 R14: 0000000000402cf0 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..