------------[ cut here ]------------
kernel BUG at net/core/dev.c:2869!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 371 Comm: syz-executor691 Not tainted 5.4.254-syzkaller-00011-g2ac128c04e33 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:skb_checksum_help+0x86c/0x880 net/core/dev.c:2869
Code: 65 16 fe e9 b3 fc ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c d0 fc ff ff 48 89 df e8 ee 64 16 fe e9 c3 fc ff ff e8 64 a3 e6 fd <0f> 0b e8 5d a3 e6 fd 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 41 57
RSP: 0018:ffff8881dca96dc8 EFLAGS: 00010293
RAX: ffffffff837da00c RBX: 0000000000002d51 RCX: ffff8881dc861f80
RDX: 0000000000000000 RSI: 0000000000002d51 RDI: 0000000000002d51
RBP: 0000000000002d51 R08: ffffffff837d9a07 R09: ffff8881dca96f80
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f29cd070
R13: 0000000000002d51 R14: ffff8881f29cd000 R15: 1ffff1103e539a0e
FS:  00005555573e0380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000d000 CR3: 00000001dca44000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ip_do_fragment+0x15e/0x2200 net/ipv4/ip_output.c:789
 ip_finish_output_gso net/ipv4/ip_output.c:288 [inline]
 __ip_finish_output+0x49c/0x710 net/ipv4/ip_output.c:311
 NF_HOOK_COND include/linux/netfilter.h:292 [inline]
 ip_mc_output+0x3d4/0xa70 net/ipv4/ip_output.c:425
 iptunnel_xmit+0x476/0x850 net/ipv4/ip_tunnel_core.c:78
 ip_tunnel_xmit+0x1aa7/0x26a0 net/ipv4/ip_tunnel.c:817
 __gre_xmit net/ipv4/ip_gre.c:442 [inline]
 ipgre_xmit+0x754/0xa50 net/ipv4/ip_gre.c:634
 __netdev_start_xmit include/linux/netdevice.h:4538 [inline]
 netdev_start_xmit include/linux/netdevice.h:4552 [inline]
 xmit_one net/core/dev.c:3213 [inline]
 dev_hard_start_xmit+0x1b7/0x6b0 net/core/dev.c:3229
 __dev_queue_xmit+0x14da/0x27e0 net/core/dev.c:3794
 packet_snd net/packet/af_packet.c:3009 [inline]
 packet_sendmsg+0x4747/0x6100 net/packet/af_packet.c:3038
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 ____sys_sendmsg+0x5ac/0x8f0 net/socket.c:2287
 ___sys_sendmsg net/socket.c:2341 [inline]
 __sys_sendmsg+0x28b/0x380 net/socket.c:2387
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Modules linked in:
---[ end trace f6fc8899b35e567d ]---
RIP: 0010:skb_checksum_help+0x86c/0x880 net/core/dev.c:2869
Code: 65 16 fe e9 b3 fc ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c d0 fc ff ff 48 89 df e8 ee 64 16 fe e9 c3 fc ff ff e8 64 a3 e6 fd <0f> 0b e8 5d a3 e6 fd 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 41 57
RSP: 0018:ffff8881dca96dc8 EFLAGS: 00010293
RAX: ffffffff837da00c RBX: 0000000000002d51 RCX: ffff8881dc861f80
RDX: 0000000000000000 RSI: 0000000000002d51 RDI: 0000000000002d51
RBP: 0000000000002d51 R08: ffffffff837d9a07 R09: ffff8881dca96f80
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f29cd070
R13: 0000000000002d51 R14: ffff8881f29cd000 R15: 1ffff1103e539a0e
FS:  00005555573e0380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000d000 CR3: 00000001dca44000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400