skb frag:     00000020: ec 0f a0 a2 c6 fa 90 6e d5 4b 26 a5 05 2d cc f3
skb frag:     00000030: 58 ad 78 60 47 07 34 b3 86 1b 34 ce a0 83 82 be
skb frag:     00000040: a3 07 b9 ef b2 30 a0 df 32 f5 67 28 3f 1e 87 ac
skb frag:     00000050: d3 22 d5 6b d0 a5 01 26 dd fc 0c 09 3c 19 79 e0
skb frag:     00000060: a6 04 4e 4a 77 48 5a 34 86 8f a4 4a 3f 79 2b 90
skb frag:     00000070: b2 ec 44 5e 0d f3 8f 7c d8 79 2b 7e c4 91 29 99
------------[ cut here ]------------
ip6tnl0: caps=(0x00000006401d7869, 0x0000000000000000)
WARNING: CPU: 0 PID: 10287 at net/core/dev.c:3293 skb_warn_bad_offload+0x166/0x1a0 net/core/dev.c:3291
Modules linked in:
CPU: 0 UID: 0 PID: 10287 Comm: syz.3.928 Not tainted 6.11.0-rc2-syzkaller-00257-g5189dafa4cf9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:skb_warn_bad_offload+0x166/0x1a0 net/core/dev.c:3291
Code: e8 ef c4 76 f8 49 8b 04 24 48 8d 88 a0 03 00 00 48 85 c0 48 0f 44 cd 48 c7 c7 00 87 0c 8d 4c 89 f6 48 89 da e8 bb a6 d1 f7 90 <0f> 0b 90 90 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 44 89 f9
RSP: 0018:ffffc900030b6dc8 EFLAGS: 00010246
RAX: 184f9c4a1d23b200 RBX: ffff888063d060b8 RCX: ffff888029611e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff8d0c86c0 R08: ffffffff8155a2d2 R09: fffffbfff1cfa0d8
R10: dffffc0000000000 R11: fffffbfff1cfa0d8 R12: ffff8880797b3158
R13: dffffc0000000000 R14: ffff888063d06130 R15: ffff888063d06130
FS:  00007f9c6bc9a6c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020077000 CR3: 0000000070338000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __skb_gso_segment+0x3be/0x4c0 net/core/gso.c:127
 skb_gso_segment include/net/gso.h:83 [inline]
 validate_xmit_skb+0x585/0x1120 net/core/dev.c:3661
 __dev_queue_xmit+0x17a4/0x3e90 net/core/dev.c:4415
 neigh_output include/net/neighbour.h:542 [inline]
 ip6_finish_output2+0xffa/0x1680 net/ipv6/ip6_output.c:137
 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:222
 ip6_send_skb+0x112/0x230 net/ipv6/ip6_output.c:1959
 udp_v6_send_skb+0xbf5/0x1870 net/ipv6/udp.c:1292
 udpv6_sendmsg+0x23b3/0x3270 net/ipv6/udp.c:1588
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xef/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
 ___sys_sendmsg net/socket.c:2651 [inline]
 __sys_sendmmsg+0x3b2/0x740 net/socket.c:2737
 __do_sys_sendmmsg net/socket.c:2766 [inline]
 __se_sys_sendmmsg net/socket.c:2763 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9c6af779f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9c6bc9a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f9c6b105f80 RCX: 00007f9c6af779f9
RDX: 0000000000000001 RSI: 0000000020004880 RDI: 0000000000000004
RBP: 00007f9c6afe58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9c6b105f80 R15: 00007f9c6b22fa38
 </TASK>