skb frag:     00000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
skb frag:     000000a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
skb frag:     000000b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
skb frag:     000000c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
skb frag:     000000d0: 00 00 00 00 00 00 00 00 00 00 00 00
------------[ cut here ]------------
offset (604) >= skb_headlen() (84)
WARNING: CPU: 0 PID: 32379 at net/core/dev.c:3294 skb_checksum_help+0x527/0x740 net/core/dev.c:3294
Modules linked in:
CPU: 0 PID: 32379 Comm: syz-executor.5 Not tainted 6.7.0-rc2-syzkaller-00542-gf1be1e04c76b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:skb_checksum_help+0x527/0x740 net/core/dev.c:3294
Code: 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 00 02 00 00 44 89 e2 2b 53 74 44 89 ee 48 c7 c7 60 12 e9 8b e8 7a 4f de f8 90 <0f> 0b 90 90 e9 42 ff ff ff e8 3b 31 18 f9 44 0f b6 25 e6 c7 93 06
RSP: 0018:ffffc9000319f338 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88802ee16500 RCX: ffffc9000feb2000
RDX: 0000000000040000 RSI: ffffffff814db216 RDI: 0000000000000001
RBP: ffff88802ee16574 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000f200 R12: 000000000000045c
R13: 000000000000025c R14: ffff88802ee16570 R15: 00000000000002e8
FS:  00007fecefc7f6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 00000000333eb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ip_do_fragment+0xa1b/0x18b0 net/ipv4/ip_output.c:777
 ip_fragment.constprop.0+0x161/0x230 net/ipv4/ip_output.c:584
 ip_finish_output_gso net/ipv4/ip_output.c:286 [inline]
 __ip_finish_output net/ipv4/ip_output.c:308 [inline]
 __ip_finish_output+0x49c/0x650 net/ipv4/ip_output.c:295
 ip_finish_output+0x31/0x310 net/ipv4/ip_output.c:323
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip_output+0x13b/0x2a0 net/ipv4/ip_output.c:433
 dst_output include/net/dst.h:451 [inline]
 ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:129
 iptunnel_xmit+0x5b4/0x9b0 net/ipv4/ip_tunnel_core.c:82
 ipip6_tunnel_xmit net/ipv6/sit.c:1034 [inline]
 sit_tunnel_xmit+0xed2/0x28f0 net/ipv6/sit.c:1076
 __netdev_start_xmit include/linux/netdevice.h:4947 [inline]
 netdev_start_xmit include/linux/netdevice.h:4961 [inline]
 xmit_one net/core/dev.c:3545 [inline]
 dev_hard_start_xmit+0x13d/0x6d0 net/core/dev.c:3561
 __dev_queue_xmit+0x7c1/0x3d60 net/core/dev.c:4346
 dev_queue_xmit include/linux/netdevice.h:3138 [inline]
 packet_xmit+0x257/0x380 net/packet/af_packet.c:276
 packet_snd net/packet/af_packet.c:3087 [inline]
 packet_sendmsg+0x24ca/0x5240 net/packet/af_packet.c:3119
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 __sys_sendto+0x255/0x340 net/socket.c:2190
 __do_sys_sendto net/socket.c:2202 [inline]
 __se_sys_sendto net/socket.c:2198 [inline]
 __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7feceee7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fecefc7f0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007feceef9c120 RCX: 00007feceee7cae9
RDX: 000000000000fc13 RSI: 0000000020000280 RDI: 0000000000000006
RBP: 00007feceeec847a R08: 0000000000000000 R09: 000000000000002f
R10: 0000000000000800 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007feceef9c120 R15: 00007ffe48264b28
 </TASK>