skb linear:   000000b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
skb linear:   000000c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
------------[ cut here ]------------
offset (1639) >= skb_headlen() (1639)
WARNING: CPU: 1 PID: 24176 at net/core/dev.c:3326 skb_checksum_help+0x1c0/0x218 net/core/dev.c:3326
Modules linked in:
CPU: 1 PID: 24176 Comm: syz.1.8728 Not tainted 6.10.0-syzkaller-04829-ge2f710f97f35 #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:3326
lr : skb_checksum_help+0x1c0/0x218 net/core/dev.c:3326
sp : ffff80008ccb3420
x29: ffff80008ccb3420 x28: 0000000000000001 x27: 0000000000000000
x26: 000000000000002f x25: ffff800081695f40 x24: 0000000000000000
x23: 0000000000000000 x22: fcf000000737c700 x21: 0000000000000667
x20: ffff8000828765d7 x19: fdf000002ca7a900 x18: ffffffffffffffff
x17: 3020303020303020 x16: 3030203030203030 x15: ffff80008ccb2e60
x14: 0000000000000000 x13: ffff80008266b0a8 x12: 0000000000001650
x11: 0000000000000770 x10: ffff80008271b0a8 x9 : ffff80008266b0a8
x8 : 00000000ffffdfff x7 : ffff80008271b0a8 x6 : 80000000ffffe000
x5 : 0000000000017ff4 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : f3f0000009542480
Call trace:
 skb_checksum_help+0x1c0/0x218 net/core/dev.c:3326
 ip_do_fragment+0x350/0x584 net/ipv4/ip_output.c:777
 ip_fragment.constprop.0+0x48/0xec 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+0x164/0x1a0 net/ipv4/ip_output.c:295
 ip_finish_output+0x34/0x10c 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+0x578/0xa68 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:4913 [inline]
 netdev_start_xmit include/linux/netdevice.h:4922 [inline]
 xmit_one net/core/dev.c:3580 [inline]
 dev_hard_start_xmit+0x94/0x114 net/core/dev.c:3596
 __dev_queue_xmit+0x1b4/0xf48 net/core/dev.c:4423
 dev_queue_xmit include/linux/netdevice.h:3105 [inline]
 packet_xmit+0xc4/0x140 net/packet/af_packet.c:276
 packet_snd net/packet/af_packet.c:3145 [inline]
 packet_sendmsg+0x8a0/0x15e4 net/packet/af_packet.c:3177
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x54/0x60 net/socket.c:745
 ____sys_sendmsg+0x274/0x2ac net/socket.c:2597
 ___sys_sendmsg+0xac/0x100 net/socket.c:2651
 __sys_sendmsg+0x84/0xe0 net/socket.c:2680
 __do_sys_sendmsg net/socket.c:2689 [inline]
 __se_sys_sendmsg net/socket.c:2687 [inline]
 __arm64_sys_sendmsg+0x24/0x30 net/socket.c:2687
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x48/0x110 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:151
 el0_svc+0x34/0xec 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 ]---