------------[ cut here ]------------ kernel BUG at net/core/dev.c:2873! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 545 Comm: syz-executor.0 Not tainted 5.4.274-syzkaller-00002-g6f97bd951d82 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:skb_checksum_help+0x873/0x880 net/core/dev.c:2873 Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c d0 fc ff ff 48 89 df e8 5e 05 16 fe e9 c3 fc ff ff e8 54 20 e6 fd 0f 0b e8 4d 20 e6 fd <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55 41 54 53 RSP: 0018:ffff8881e7d7ee68 EFLAGS: 00010287 RAX: ffffffff837e1bd3 RBX: 0000000000002989 RCX: 0000000000040000 RDX: ffffc90001749000 RSI: 000000000000112d RDI: 000000000000112e RBP: 0000000000003528 R08: ffffffff837e164f R09: ffffed103cfafdbe R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881e96832f0 R13: 0000000000003526 R14: ffff8881e9683280 R15: 1ffff1103d2d065e FS: 00007f7f08c076c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002ac0 CR3: 00000001d365d000 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_output+0x19b/0x3a0 net/ipv4/ip_output.c:440 iptunnel_xmit+0x476/0x850 net/ipv4/ip_tunnel_core.c:78 ip_tunnel_xmit+0x1ac0/0x2690 net/ipv4/ip_tunnel.c:831 __gre_xmit net/ipv4/ip_gre.c:465 [inline] ipgre_xmit+0x81a/0xbf0 net/ipv4/ip_gre.c:660 __netdev_start_xmit include/linux/netdevice.h:4538 [inline] netdev_start_xmit include/linux/netdevice.h:4552 [inline] xmit_one net/core/dev.c:3221 [inline] dev_hard_start_xmit+0x1b7/0x6b0 net/core/dev.c:3237 __dev_queue_xmit+0x14da/0x27e0 net/core/dev.c:3802