device syz0 entered promiscuous mode
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3324 at net/core/dev.c:2449 skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2444()
syz0: caps=(0x00000080000048c1, 0x0000000000000000) len=56 data_len=0 gso_size=3 gso_type=20 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3324 Comm: syzkaller736055 Not tainted 4.4.110-gd891a62 #19
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 162a662e8cb5e28d ffff8801d1137428 ffffffff81d04e3d
 ffffffff83842f60 ffff8801d1137500 ffffffff83ca9d60 0000000000000009
 0000000000000991 ffff8801d11374f0 ffffffff814197fa 0000000041b58ab3
Call Trace:
 [<ffffffff81d04e3d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d04e3d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814197fa>] panic+0x1aa/0x388 kernel/panic.c:112
 [<ffffffff8112d725>] warn_slowpath_common+0x125/0x140 kernel/panic.c:455
 [<ffffffff8112d801>] warn_slowpath_fmt+0xc1/0x110 kernel/panic.c:471
 [<ffffffff82e46d0f>] skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2444
 [<ffffffff82e577d3>] __skb_gso_segment+0x3b3/0x4a0 net/core/dev.c:2602
 [<ffffffff82e583ae>] skb_gso_segment include/linux/netdevice.h:3705 [inline]
 [<ffffffff82e583ae>] validate_xmit_skb.isra.100.part.101+0x44e/0x970 net/core/dev.c:2810
 [<ffffffff82e5897e>] validate_xmit_skb net/core/dev.c:2856 [inline]
 [<ffffffff82e5897e>] validate_xmit_skb_list+0xae/0x110 net/core/dev.c:2858
 [<ffffffff82ee12ff>] sch_direct_xmit+0x34f/0x760 net/sched/sch_generic.c:160
 [<ffffffff82e5b278>] __dev_xmit_skb net/core/dev.c:2939 [inline]
 [<ffffffff82e5b278>] __dev_queue_xmit+0x1368/0x1a70 net/core/dev.c:3157
 [<ffffffff82e5b997>] dev_queue_xmit+0x17/0x20 net/core/dev.c:3223
 [<ffffffff834343e2>] packet_snd net/packet/af_packet.c:2828 [inline]
 [<ffffffff834343e2>] packet_sendmsg+0x29b2/0x47e0 net/packet/af_packet.c:2853
 [<ffffffff82ded6da>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82ded6da>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82ded946>] sock_write_iter+0x226/0x3b0 net/socket.c:834
 [<ffffffff8151c7bc>] new_sync_write fs/read_write.c:478 [inline]
 [<ffffffff8151c7bc>] __vfs_write+0x33c/0x450 fs/read_write.c:491
 [<ffffffff8151e3ea>] vfs_write+0x18a/0x530 fs/read_write.c:538
 [<ffffffff81520ad9>] SYSC_write fs/read_write.c:585 [inline]
 [<ffffffff81520ad9>] SyS_write+0xd9/0x1b0 fs/read_write.c:577
 [<ffffffff837755d9>] entry_SYSCALL_64_fastpath+0x16/0x92
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..