syz0: caps=(0x00000800000058c1, 0x0000000000000000) len=28 data_len=0 gso_size=8 gso_type=3 ip_summed=0
WARNING: CPU: 1 PID: 3192 at net/core/dev.c:2600 skb_warn_bad_offload+0x2bd/0x3c0 net/core/dev.c:2595
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3192 Comm: syzkaller439144 Not tainted 4.15.0-rc5+ #153
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1079
RIP: 0010:skb_warn_bad_offload+0x2bd/0x3c0 net/core/dev.c:2595
RSP: 0018:ffff8801c7cdef00 EFLAGS: 00010282
RAX: dffffc0000000008 RBX: ffff8801c7dc82c0 RCX: ffffffff8159b75e
RDX: 0000000000000000 RSI: 1ffff100398eb9b8 RDI: 0000000000000293
RBP: ffff8801c7cdef58 R08: 1ffff10038f9bd73 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8801c7dc82c0 R14: ffff8801c7fe96a0 R15: 0000000000000003
 __skb_gso_segment+0x612/0x800 net/core/dev.c:2807
 skb_gso_segment include/linux/netdevice.h:3993 [inline]
 validate_xmit_skb+0x4ba/0xb20 net/core/dev.c:3057
 validate_xmit_skb_list+0xb7/0x120 net/core/dev.c:3108
 sch_direct_xmit+0x3b6/0x6d0 net/sched/sch_generic.c:182
 __dev_xmit_skb net/core/dev.c:3189 [inline]
 __dev_queue_xmit+0x196d/0x2370 net/core/dev.c:3456
 dev_queue_xmit+0x17/0x20 net/core/dev.c:3521
 packet_snd net/packet/af_packet.c:2943 [inline]
 packet_sendmsg+0x3ad5/0x60a0 net/packet/af_packet.c:2968
 sock_sendmsg_nosec net/socket.c:636 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:646
 sock_write_iter+0x31a/0x5d0 net/socket.c:915
 call_write_iter include/linux/fs.h:1772 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x684/0x970 fs/read_write.c:482
 vfs_write+0x189/0x510 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xef/0x220 fs/read_write.c:581
 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline]
 do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389
 entry_SYSENTER_compat+0x54/0x63 arch/x86/entry/entry_64_compat.S:129
RIP: 0023:0xf7fabc79
RSP: 002b:00000000ff86466c EFLAGS: 00000293 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020384000
RDX: 0000000000000026 RSI: 00000000080ef00c RDI: 000000000000003f
RBP: 0000000000001000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..