------------[ cut here ]------------ kernel BUG at net/core/dev.c:3309! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 19428 Comm: syz-executor.1 Not tainted 5.13.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_checksum_help+0x4ad/0x5b0 net/core/dev.c:3309 Code: 41 5f c3 e8 25 08 6a fa 45 89 ec e9 59 ff ff ff e8 18 08 6a fa 48 89 ef 41 bc ea ff ff ff e8 2a f9 ff ff eb c7 e8 03 08 6a fa <0f> 0b e8 fc 07 6a fa 0f 0b 4c 89 f7 e8 42 28 af fa e9 79 fb ff ff RSP: 0018:ffffc90002c77048 EFLAGS: 00010212 RAX: 000000000000d632 RBX: 0000000000002344 RCX: ffffc9000c321000 RDX: 0000000000040000 RSI: ffffffff870ad3ed RDI: 0000000000000003 RBP: ffff88806c8c1140 R08: 0000000000000086 R09: 0000000000000000 R10: ffffffff870ad1ef R11: 0000000000000000 R12: ffff88806c8c11b4 R13: 00000000000022ba R14: ffff88806c8c11c0 R15: 0000000000002326 FS: 00007f1c72275700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000529530 CR3: 0000000068c4d000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ip_do_fragment+0x891/0x1450 net/ipv4/ip_output.c:787 ip_fragment.constprop.0+0x174/0x240 net/ipv4/ip_output.c:582 __ip_finish_output net/ipv4/ip_output.c:306 [inline] __ip_finish_output+0x2de/0x640 net/ipv4/ip_output.c:290 ip_finish_output+0x35/0x200 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x196/0x310 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:448 [inline] ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:126 iptunnel_xmit+0x5a3/0x9c0 net/ipv4/ip_tunnel_core.c:82 geneve_xmit_skb drivers/net/geneve.c:971 [inline] geneve_xmit+0x112d/0x3430 drivers/net/geneve.c:1082 __netdev_start_xmit include/linux/netdevice.h:4944 [inline] netdev_start_xmit include/linux/netdevice.h:4958 [inline] xmit_one net/core/dev.c:3654 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3670 sch_direct_xmit+0x19f/0xba0 net/sched/sch_generic.c:336 qdisc_restart net/sched/sch_generic.c:401 [inline] __qdisc_run+0x4bc/0x1680 net/sched/sch_generic.c:409 __dev_xmit_skb net/core/dev.c:3905 [inline] __dev_queue_xmit+0x19d5/0x3130 net/core/dev.c:4214 packet_snd net/packet/af_packet.c:3015 [inline] packet_sendmsg+0x22ee/0x5310 net/packet/af_packet.c:3043 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2337 ___sys_sendmsg+0xf3/0x170 net/socket.c:2391 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2420 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1c72275188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000080 RSI: 0000000020000440 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffc8e10c64f R14: 00007f1c72275300 R15: 0000000000022000 Modules linked in: ---[ end trace 3f39610de96ee9bd ]--- RIP: 0010:skb_checksum_help+0x4ad/0x5b0 net/core/dev.c:3309 Code: 41 5f c3 e8 25 08 6a fa 45 89 ec e9 59 ff ff ff e8 18 08 6a fa 48 89 ef 41 bc ea ff ff ff e8 2a f9 ff ff eb c7 e8 03 08 6a fa <0f> 0b e8 fc 07 6a fa 0f 0b 4c 89 f7 e8 42 28 af fa e9 79 fb ff ff RSP: 0018:ffffc90002c77048 EFLAGS: 00010212 RAX: 000000000000d632 RBX: 0000000000002344 RCX: ffffc9000c321000 RDX: 0000000000040000 RSI: ffffffff870ad3ed RDI: 0000000000000003 RBP: ffff88806c8c1140 R08: 0000000000000086 R09: 0000000000000000 R10: ffffffff870ad1ef R11: 0000000000000000 R12: ffff88806c8c11b4 R13: 00000000000022ba R14: ffff88806c8c11c0 R15: 0000000000002326 FS: 00007f1c72275700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000529530 CR3: 0000000068c4d000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400