------------[ cut here ]------------ kernel BUG at net/core/dev.c:3233! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 10449 Comm: syz-executor.5 Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_checksum_help+0x4c1/0x5b0 net/core/dev.c:3233 Code: fa 45 89 ec e9 59 ff ff ff e8 1b 89 7c fa 48 89 ef 41 bc ea ff ff ff e8 1d f9 ff ff eb c7 e8 06 89 7c fa 0f 0b e8 ff 88 7c fa <0f> 0b 4c 89 f7 e8 b5 43 bf fa e9 6c fb ff ff e8 bb 43 bf fa e9 1b RSP: 0018:ffffc90001a97100 EFLAGS: 00010216 RAX: 00000000000096c4 RBX: 00000000000003d2 RCX: ffffc900137c8000 RDX: 0000000000040000 RSI: ffffffff86f640c1 RDI: 0000000000000003 RBP: ffff8880130a98c0 R08: 00000000000003d4 R09: 0000000000000000 R10: ffffffff86f63f8d R11: 0000000000000000 R12: 00000000000000e0 R13: 00000000000003d4 R14: ffff8880130a9940 R15: 00000000000003d2 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0063) knlGS:00000000f550ab40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000055bbc4322900 CR3: 00000000285a8000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_csum_hwoffload_help+0x8b/0x130 net/core/dev.c:3624 validate_xmit_skb+0xbd5/0xee0 net/core/dev.c:3667 __dev_queue_xmit+0x988/0x2dd0 net/core/dev.c:4142 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip_finish_output2+0xeb6/0x21b0 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:441 [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:959 [inline] geneve_xmit+0xde1/0x2f60 drivers/net/geneve.c:1059 __netdev_start_xmit include/linux/netdevice.h:4776 [inline] netdev_start_xmit include/linux/netdevice.h:4790 [inline] xmit_one net/core/dev.c:3574 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3590 sch_direct_xmit+0x2e1/0xbd0 net/sched/sch_generic.c:313 qdisc_restart net/sched/sch_generic.c:376 [inline] __qdisc_run+0x4ba/0x15f0 net/sched/sch_generic.c:384 __dev_xmit_skb net/core/dev.c:3813 [inline] __dev_queue_xmit+0x1a30/0x2dd0 net/core/dev.c:4119 packet_snd net/packet/af_packet.c:3006 [inline] packet_sendmsg+0x2413/0x52b0 net/packet/af_packet.c:3031 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 __sys_sendto+0x21c/0x320 net/socket.c:1975 __do_sys_sendto net/socket.c:1987 [inline] __se_sys_sendto net/socket.c:1983 [inline] __ia32_sys_sendto+0xdb/0x1b0 net/socket.c:1983 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f10549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f550a0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000171 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000080 RDX: 0000000000003287 RSI: 0000000004000002 RDI: 0000000000000000 RBP: 00000000000002ff R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 21664918247b65aa ]--- RIP: 0010:skb_checksum_help+0x4c1/0x5b0 net/core/dev.c:3233 Code: fa 45 89 ec e9 59 ff ff ff e8 1b 89 7c fa 48 89 ef 41 bc ea ff ff ff e8 1d f9 ff ff eb c7 e8 06 89 7c fa 0f 0b e8 ff 88 7c fa <0f> 0b 4c 89 f7 e8 b5 43 bf fa e9 6c fb ff ff e8 bb 43 bf fa e9 1b RSP: 0018:ffffc90001a97100 EFLAGS: 00010216 RAX: 00000000000096c4 RBX: 00000000000003d2 RCX: ffffc900137c8000 RDX: 0000000000040000 RSI: ffffffff86f640c1 RDI: 0000000000000003 RBP: ffff8880130a98c0 R08: 00000000000003d4 R09: 0000000000000000 R10: ffffffff86f63f8d R11: 0000000000000000 R12: 00000000000000e0 R13: 00000000000003d4 R14: ffff8880130a9940 R15: 00000000000003d2 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0063) knlGS:00000000f550ab40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000055bbc4322900 CR3: 00000000285a8000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400