------------[ cut here ]------------ kernel BUG at net/core/dev.c:2873! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 1348 Comm: syz-executor.1 Not tainted 5.4.274-syzkaller-00016-gdd432c37afcd #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 74 20 e6 fd 0f 0b e8 6d 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:ffff8881ef576e68 EFLAGS: 00010283 RAX: ffffffff837e1bb3 RBX: 0000000000002989 RCX: 0000000000040000 RDX: ffffc90000942000 RSI: 0000000000000e12 RDI: 0000000000000e13 RBP: 0000000000003528 R08: ffffffff837e162f R09: ffffed103deaedbe R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f24e8a70 R13: 0000000000003526 R14: ffff8881f24e8a00 R15: 1ffff1103e49d14e FS: 00007faf8ccac6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000e000 CR3: 00000001e9975000 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 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:650 [inline] ____sys_sendmsg+0x5ac/0x8f0 net/socket.c:2306 ___sys_sendmsg net/socket.c:2360 [inline] __sys_sendmsg+0x28b/0x380 net/socket.c:2406 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7faf8d931f69 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:00007faf8ccac0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007faf8da68f80 RCX: 00007faf8d931f69 RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 RBP: 00007faf8d98f6fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007faf8da68f80 R15: 00007fff8f385308 Modules linked in: ---[ end trace 473359b4dbd6119b ]--- 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 74 20 e6 fd 0f 0b e8 6d 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:ffff8881ef576e68 EFLAGS: 00010283 RAX: ffffffff837e1bb3 RBX: 0000000000002989 RCX: 0000000000040000 RDX: ffffc90000942000 RSI: 0000000000000e12 RDI: 0000000000000e13 RBP: 0000000000003528 R08: ffffffff837e162f R09: ffffed103deaedbe R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f24e8a70 R13: 0000000000003526 R14: ffff8881f24e8a00 R15: 1ffff1103e49d14e FS: 00007faf8ccac6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000e000 CR3: 00000001e9975000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400