------------[ cut here ]------------ kernel BUG at net/core/dev.c:3313! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8721 Comm: syz-executor812 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_checksum_help+0x4b4/0x5b0 net/core/dev.c:3313 Code: fa 45 89 ec e9 59 ff ff ff e8 38 57 69 fa 48 89 ef 41 bc ea ff ff ff e8 2a f9 ff ff eb c7 e8 23 57 69 fa 0f 0b e8 1c 57 69 fa <0f> 0b 4c 89 f7 e8 62 df ad fa e9 79 fb ff ff e8 68 df ad fa e9 28 RSP: 0018:ffffc9000211f0e8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 00000000000003d2 RCX: 0000000000000000 RDX: ffff8880147ac280 RSI: ffffffff870aba44 RDI: 0000000000000003 RBP: ffff88803c9dbe00 R08: 00000000000003d4 R09: 0000000000000000 R10: ffffffff870ab910 R11: 0000000000000000 R12: 00000000000000e0 R13: 00000000000003d4 R14: ffff88803c9dbe80 R15: 00000000000003d2 FS: 0000000000afc300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000003cbac000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_csum_hwoffload_help+0x126/0x1e0 net/core/dev.c:3715 validate_xmit_skb+0xbd5/0xee0 net/core/dev.c:3758 __dev_queue_xmit+0x8ef/0x3130 net/core/dev.c:4237 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip_finish_output2+0xeec/0x21f0 net/ipv4/ip_output.c:230 __ip_finish_output net/ipv4/ip_output.c:308 [inline] __ip_finish_output+0x396/0x640 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+0x2412/0x5280 net/packet/af_packet.c:3040 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 __sys_sendto+0x21c/0x320 net/socket.c:1977 __do_sys_sendto net/socket.c:1989 [inline] __se_sys_sendto net/socket.c:1985 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1985 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x443b19 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff1cc44888 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443b19 RDX: 0000000000003287 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000002ff R10: 0000000004000002 R11: 0000000000000246 R12: 00007fff1cc448b0 R13: 00000000000f4240 R14: 0000000000014595 R15: 00007fff1cc448a4 Modules linked in: ---[ end trace 4ea0ac57b06c3762 ]--- RIP: 0010:skb_checksum_help+0x4b4/0x5b0 net/core/dev.c:3313 Code: fa 45 89 ec e9 59 ff ff ff e8 38 57 69 fa 48 89 ef 41 bc ea ff ff ff e8 2a f9 ff ff eb c7 e8 23 57 69 fa 0f 0b e8 1c 57 69 fa <0f> 0b 4c 89 f7 e8 62 df ad fa e9 79 fb ff ff e8 68 df ad fa e9 28 RSP: 0018:ffffc9000211f0e8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 00000000000003d2 RCX: 0000000000000000 RDX: ffff8880147ac280 RSI: ffffffff870aba44 RDI: 0000000000000003 RBP: ffff88803c9dbe00 R08: 00000000000003d4 R09: 0000000000000000 R10: ffffffff870ab910 R11: 0000000000000000 R12: 00000000000000e0 R13: 00000000000003d4 R14: ffff88803c9dbe80 R15: 00000000000003d2 FS: 0000000000afc300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000003cbac000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400