device syz0 entered promiscuous mode
------------[ cut here ]------------
syz0: caps=(0x00000800000058c1, 0x0000000000000000) len=56 data_len=0 gso_size=3 gso_type=18 ip_summed=0
WARNING: CPU: 1 PID: 3149 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: 3149 Comm: syzkaller972641 Not tainted 4.15.0-rc2-mm1+ #39
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:177
 fixup_bug arch/x86/kernel/traps.c:246 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 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:ffff8801c42970f8 EFLAGS: 00010286
RAX: dffffc0000000008 RBX: ffff8801c29a02c0 RCX: ffffffff815a03fe
RDX: 0000000000000000 RSI: 1ffff10038503973 RDI: 0000000000000293
RBP: ffff8801c4297150 R08: 1ffff10038852db2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8801c29a02c0 R14: ffff8801c4b7ce58 R15: 0000000000000012
 __skb_gso_segment+0x612/0x800 net/core/dev.c:2807
 skb_gso_segment include/linux/netdevice.h:3996 [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+0x16eb/0x2070 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+0x3ab1/0x6060 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+0x320/0x5e0 net/socket.c:915
 call_write_iter include/linux/fs.h:1776 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x68a/0x970 fs/read_write.c:482
 vfs_write+0x18f/0x510 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xef/0x220 fs/read_write.c:581
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4442c9
RSP: 002b:00007ffcc3e70d88 EFLAGS: 00000297 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 00000000004442c9
RDX: 0000000000000042 RSI: 00000000204f0000 RDI: 0000000000000005
RBP: 00000000006ce018 R08: 00007ffcc3e70f08 R09: 00007ffc00001e32
R10: 000000000000000f R11: 0000000000000297 R12: 0000000000401fb0
R13: 0000000000402040 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..