syzbot

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WARNING: CPU: 0 PID: 3240 at net/core/dev.c:2462 skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2457
syz0: caps=(0x00000400000058c1, 0x0000000000000000) len=170 data_len=0 gso_size=17408 gso_type=5 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3240 Comm: syzkaller322729 Not tainted 4.9.43-g7073fca #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d853f200 ffffffff81d92909 ffffffff83a46b40 ffff8801d853f2d8
 ffffffff83edf700 ffffffff82f292cf 0000000000000009 ffff8801d853f2c8
 ffffffff8142e0e1 0000000041b58ab3 ffffffff84184118 ffffffff8142df25
Call Trace:
 [<ffffffff81d92909>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d92909>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142e0e1>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff81131e54>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff81131f34>] warn_slowpath_fmt+0xc4/0x110 kernel/panic.c:565
 [<ffffffff82f292cf>] skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2457
 [<ffffffff82f3ce3b>] __skb_gso_segment+0x52b/0x670 net/core/dev.c:2763
 [<ffffffff82f3dcde>] skb_gso_segment include/linux/netdevice.h:3995 [inline]
 [<ffffffff82f3dcde>] validate_xmit_skb+0x44e/0x980 net/core/dev.c:2999
 [<ffffffff82f3e2c7>] validate_xmit_skb_list+0xb7/0x120 net/core/dev.c:3048
 [<ffffffff82fd784a>] sch_direct_xmit+0x34a/0x5d0 net/sched/sch_generic.c:177
 [<ffffffff82f404cd>] __dev_xmit_skb net/core/dev.c:3129 [inline]
 [<ffffffff82f404cd>] __dev_queue_xmit+0x15fd/0x1e60 net/core/dev.c:3389
 [<ffffffff810002b8>] ? 0xffffffff810002b8
 [<ffffffff82f40d47>] dev_queue_xmit+0x17/0x20 net/core/dev.c:3454
 [<ffffffff8354c7f7>] packet_snd net/packet/af_packet.c:2944 [inline]
 [<ffffffff8354c7f7>] packet_sendmsg+0x2d07/0x47e0 net/packet/af_packet.c:2969
 [<ffffffff82ecbb9a>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ecbb9a>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ecd3a0>] ___sys_sendmsg+0x320/0x7e0 net/socket.c:1968
 [<ffffffff82ecf9e9>] __sys_sendmmsg+0x159/0x3a0 net/socket.c:2058
 [<ffffffff82ecfc65>] SYSC_sendmmsg net/socket.c:2089 [inline]
 [<ffffffff82ecfc65>] SyS_sendmmsg+0x35/0x60 net/socket.c:2084
 [<ffffffff838a6985>] entry_SYSCALL_64_fastpath+0x23/0xc6
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..