device syz0 entered promiscuous mode
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3280 at net/core/dev.c:2465 skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2460
syz0: caps=(0x00000400000058c1, 0x0000000000000000) len=392 data_len=0 gso_size=127 gso_type=5 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3280 Comm: syzkaller108295 Not tainted 4.9.66-gb763480 #103
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c7d77370 ffffffff81d90749 ffffffff83a46d00 ffff8801c7d77448
 ffffffff83ee0b00 ffffffff82f2c24f 0000000000000009 ffff8801c7d77438
 ffffffff8142c411 0000000041b58ab3 ffffffff84186e58 ffffffff8142c255
Call Trace:
 [<ffffffff81d90749>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d90749>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142c411>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff8112f3d4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff8112f4b4>] warn_slowpath_fmt+0xc4/0x110 kernel/panic.c:565
 [<ffffffff82f2c24f>] skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2460
 [<ffffffff82f3fdeb>] __skb_gso_segment+0x52b/0x670 net/core/dev.c:2766
 [<ffffffff82f40c8e>] skb_gso_segment include/linux/netdevice.h:4000 [inline]
 [<ffffffff82f40c8e>] validate_xmit_skb+0x44e/0x980 net/core/dev.c:3002
 [<ffffffff82f41277>] validate_xmit_skb_list+0xb7/0x120 net/core/dev.c:3051
 [<ffffffff82fdaeaa>] sch_direct_xmit+0x34a/0x5d0 net/sched/sch_generic.c:177
 [<ffffffff82f4347d>] __dev_xmit_skb net/core/dev.c:3132 [inline]
 [<ffffffff82f4347d>] __dev_queue_xmit+0x15fd/0x1e60 net/core/dev.c:3392
 [<ffffffff82f43cf7>] dev_queue_xmit+0x17/0x20 net/core/dev.c:3457
 [<ffffffff8354f68c>] packet_snd net/packet/af_packet.c:2960 [inline]
 [<ffffffff8354f68c>] packet_sendmsg+0x2ccc/0x4760 net/packet/af_packet.c:2985
 [<ffffffff82eceb9a>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82eceb9a>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ecee06>] sock_write_iter+0x226/0x3b0 net/socket.c:843
 [<ffffffff8156a96f>] new_sync_write fs/read_write.c:499 [inline]
 [<ffffffff8156a96f>] __vfs_write+0x4bf/0x680 fs/read_write.c:512
 [<ffffffff8156c299>] vfs_write+0x189/0x530 fs/read_write.c:560
 [<ffffffff8156fd89>] SYSC_write fs/read_write.c:607 [inline]
 [<ffffffff8156fd89>] SyS_write+0xd9/0x1b0 fs/read_write.c:599
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..