------------[ cut here ]------------
WARNING: CPU: 0 PID: 15160 at net/core/dev.c:2495 skb_warn_bad_offload+0x2b0/0x390 net/core/dev.c:2490
sit0: caps=(0x00000000803b7869, 0x0000000000000000) len=4025 data_len=3977 gso_size=1432 gso_type=2 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 15160 Comm: syz-executor.2 Not tainted 4.9.141+ #23
 ffff8801d9d0eef0 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff
 ffffffff82c71900 0000000000000000 0000000000000009 ffff8801d9d0efb0
 ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813f7125>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813f7362>] __warn.cold.8+0x2f/0x2f kernel/panic.c:542
 [<ffffffff810dbec2>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565
 [<ffffffff822fbc80>] skb_warn_bad_offload+0x2b0/0x390 net/core/dev.c:2490
 [<ffffffff823133fe>] __skb_gso_segment+0x57e/0x6b0 net/core/dev.c:2796
 [<ffffffff82314390>] skb_gso_segment include/linux/netdevice.h:4007 [inline]
 [<ffffffff82314390>] validate_xmit_skb+0x490/0xab0 net/core/dev.c:3032
 [<ffffffff82315eb5>] __dev_queue_xmit+0x835/0x1b90 net/core/dev.c:3465
 [<ffffffff82317227>] dev_queue_xmit+0x17/0x20 net/core/dev.c:3506
 [<ffffffff8232f395>] neigh_direct_output+0x15/0x20 net/core/neighbour.c:1365
 [<ffffffff8269132e>] dst_neigh_output include/net/dst.h:470 [inline]
 [<ffffffff8269132e>] ip6_finish_output2+0xb0e/0x1d10 net/ipv6/ip6_output.c:119
 [<ffffffff826a1e74>] ip6_finish_output+0x334/0x980 net/ipv6/ip6_output.c:145
 [<ffffffff826a26aa>] NF_HOOK_COND include/linux/netfilter.h:246 [inline]
 [<ffffffff826a26aa>] ip6_output+0x1ea/0x6d0 net/ipv6/ip6_output.c:162
 [<ffffffff827bce1b>] dst_output include/net/dst.h:507 [inline]
 [<ffffffff827bce1b>] ip6_local_out+0x9b/0x180 net/ipv6/output_core.c:176
 [<ffffffff826a4891>] ip6_send_skb+0xa1/0x340 net/ipv6/ip6_output.c:1751
 [<ffffffff82706aa3>] udp_v6_send_skb+0x843/0xe70 net/ipv6/udp.c:974
 [<ffffffff827072fd>] udp_v6_push_pending_frames+0x22d/0x340 net/ipv6/udp.c:1007
 [<ffffffff827092b1>] udpv6_sendmsg+0x1dc1/0x2430 net/ipv6/udp.c:1273
 [<ffffffff825952f3>] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:770
 [<ffffffff822a063b>] sock_sendmsg_nosec net/socket.c:648 [inline]
 [<ffffffff822a063b>] sock_sendmsg+0xbb/0x110 net/socket.c:658
 [<ffffffff822a231c>] ___sys_sendmsg+0x6fc/0x840 net/socket.c:1982
 [<ffffffff822a5339>] __sys_sendmsg+0xd9/0x190 net/socket.c:2016
 [<ffffffff8239014a>] C_SYSC_sendmsg net/compat.c:736 [inline]
 [<ffffffff8239014a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:734
 [<ffffffff81006311>] do_syscall_32_irqs_on arch/x86/entry/common.c:328 [inline]
 [<ffffffff81006311>] do_fast_syscall_32+0x2f1/0xa10 arch/x86/entry/common.c:390
 [<ffffffff82818de0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Kernel Offset: disabled
Rebooting in 86400 seconds..