syzbot

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WARNING: CPU: 1 PID: 11935 at net/core/dev.c:2456 skb_warn_bad_offload+0x2af/0x380 net/core/dev.c:2451()
sit0: caps=(0x00000000001b7869, 0x0000000000000000) len=65081 data_len=65033 gso_size=1432 gso_type=2 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 11935 Comm: syz-executor718 Not tainted 4.4.136-ge4798d7 #60
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 34579f44c285d585 ffff8800acfd7120 ffffffff81e0edad
 ffffffff83a43ec0 ffff8800b66d9800 ffffffff83ec6600 0000000000000009
 0000000000000998 ffff8800acfd71e0 ffffffff8140a184 0000000041b58ab3
Call Trace:
 [<ffffffff81e0edad>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0edad>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff8140a184>] panic+0x19e/0x38d kernel/panic.c:112
 [<ffffffff8140a3a8>] warn_slowpath_common.cold.6+0x20/0x20 kernel/panic.c:455
 [<ffffffff8112ffff>] warn_slowpath_fmt+0xbf/0x100 kernel/panic.c:471
 [<ffffffff82f6f87f>] skb_warn_bad_offload+0x2af/0x380 net/core/dev.c:2451
 [<ffffffff82f87c0e>] __skb_gso_segment+0x3ce/0x490 net/core/dev.c:2609
 [<ffffffff82f888cb>] skb_gso_segment include/linux/netdevice.h:3705 [inline]
 [<ffffffff82f888cb>] validate_xmit_skb.isra.103.part.104+0x48b/0xaa0 net/core/dev.c:2817
 [<ffffffff82f8baf7>] validate_xmit_skb include/linux/spinlock.h:302 [inline]
 [<ffffffff82f8baf7>] __dev_queue_xmit+0x1687/0x1c80 net/core/dev.c:3199
 [<ffffffff82f8c107>] dev_queue_xmit+0x17/0x20 net/core/dev.c:3241
 [<ffffffff82f9d935>] neigh_direct_output+0x15/0x20 net/core/neighbour.c:1366
 [<ffffffff83429d29>] dst_neigh_output include/net/dst.h:461 [inline]
 [<ffffffff83429d29>] ip6_finish_output2+0x929/0x1ca0 net/ipv6/ip6_output.c:113
 [<ffffffff83433368>] ip6_finish_output+0x3b8/0x760 net/ipv6/ip6_output.c:131
 [<ffffffff834338c8>] NF_HOOK_COND include/linux/netfilter.h:240 [inline]
 [<ffffffff834338c8>] ip6_output+0x1b8/0x520 net/ipv6/ip6_output.c:145
 [<ffffffff8355cb9b>] dst_output include/net/dst.h:498 [inline]
 [<ffffffff8355cb9b>] ip6_local_out+0x9b/0x180 net/ipv6/output_core.c:169
 [<ffffffff83435901>] ip6_send_skb+0xa1/0x340 net/ipv6/ip6_output.c:1725
 [<ffffffff834917aa>] udp_v6_send_skb+0x5ba/0xe70 net/ipv6/udp.c:1066
 [<ffffffff8349714e>] udpv6_sendmsg+0x1f2e/0x24c0 net/ipv6/udp.c:1330
 [<ffffffff83300ef3>] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff82f1e1fc>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1e1fc>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1eedc>] SYSC_sendto+0x21c/0x370 net/socket.c:1665
 [<ffffffff82f21560>] SyS_sendto+0x40/0x50 net/socket.c:1633
 [<ffffffff838c2825>] entry_SYSCALL_64_fastpath+0x22/0x9e
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..