skb frag:     00000030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
skb frag:     00000040: 00 00 00 00 00 00 00 00
------------[ cut here ]------------
offset (10633) >= skb_headlen() (136)
WARNING: CPU: 1 PID: 2917 at net/core/dev.c:3324 skb_checksum_help+0x1c0/0x218 net/core/dev.c:3324
Modules linked in:
CPU: 1 PID: 2917 Comm: syz.0.40034 Not tainted 6.10.0-rc7-syzkaller-00266-g4d145e3f830b #0
Hardware name: linux,dummy-virt (DT)
pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : skb_checksum_help+0x1c0/0x218 net/core/dev.c:3324
lr : skb_checksum_help+0x1c0/0x218 net/core/dev.c:3324
sp : ffff800088d8b490
x29: ffff800088d8b490 x28: 0000000000000002 x27: 000000000000000f
x26: 0000000000000000 x25: ffff8000816790e8 x24: 0000000000000000
x23: 0000000000000000 x22: fcf00000078fb3c0 x21: 0000000000002989
x20: ffff8000828460d2 x19: f7f00000062a3800 x18: ffffffffffffffff
x17: 3020303020303020 x16: 3030203030203030 x15: ffff800088d8aec0
x14: 0000000000000000 x13: ffff80008263b080 x12: 0000000000000be2
x11: 00000000000003f6 x10: ffff8000826f0f90 x9 : ffff80008263b080
x8 : 00000000ffffe3f6 x7 : ffff8000826eb080 x6 : 00000000000003f6
x5 : 0000000000002f88 x4 : c0000000ffffe3f6 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : f9f0000007b52480
Call trace:
 skb_checksum_help+0x1c0/0x218 net/core/dev.c:3324
 ip_do_fragment+0x34c/0x580 net/ipv4/ip_output.c:777
 ip_fragment.constprop.0+0x48/0xe8 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+0x15c/0x19c net/ipv4/ip_output.c:295
 ip_finish_output+0x34/0x108 net/ipv4/ip_output.c:323
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip_output+0x68/0x100 net/ipv4/ip_output.c:433
 dst_output include/net/dst.h:450 [inline]
 ip_local_out+0x48/0x5c net/ipv4/ip_output.c:129
 iptunnel_xmit+0x138/0x330 net/ipv4/ip_tunnel_core.c:82
 ip_tunnel_xmit+0x574/0xa60 net/ipv4/ip_tunnel.c:857
 __gre_xmit+0x18c/0x234 net/ipv4/ip_gre.c:483
 ipgre_xmit+0x130/0x2d4 net/ipv4/ip_gre.c:687
 __netdev_start_xmit include/linux/netdevice.h:4882 [inline]
 netdev_start_xmit include/linux/netdevice.h:4896 [inline]
 xmit_one net/core/dev.c:3578 [inline]
 dev_hard_start_xmit+0x98/0x118 net/core/dev.c:3594
 __dev_queue_xmit+0x1c0/0xea8 net/core/dev.c:4393
 dev_queue_xmit include/linux/netdevice.h:3095 [inline]
 packet_xmit+0xcc/0x144 net/packet/af_packet.c:276
 packet_snd net/packet/af_packet.c:3080 [inline]
 packet_sendmsg+0x840/0x1560 net/packet/af_packet.c:3112
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x54/0x60 net/socket.c:745
 ____sys_sendmsg+0x274/0x2ac net/socket.c:2585
 ___sys_sendmsg+0xac/0x100 net/socket.c:2639
 __sys_sendmsg+0x84/0xe0 net/socket.c:2668
 __do_sys_sendmsg net/socket.c:2677 [inline]
 __se_sys_sendmsg net/socket.c:2675 [inline]
 __arm64_sys_sendmsg+0x24/0x30 net/socket.c:2675
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x48/0x118 arch/arm64/kernel/syscall.c:48
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:131
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:150
 el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598
---[ end trace 0000000000000000 ]---