netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. ------------[ cut here ]------------ kernel BUG at net/core/dev.c:3163! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3892 Comm: syz-executor.2 Not tainted 5.16.0-rc2-next-20211125-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:3163 Code: fa 45 89 ec e9 59 ff ff ff e8 68 7d 45 fa 48 89 ef 41 bc ea ff ff ff e8 2a f9 ff ff eb c7 e8 53 7d 45 fa 0f 0b e8 4c 7d 45 fa <0f> 0b 4c 89 f7 e8 12 0c 90 fa e9 79 fb ff ff e8 18 0c 90 fa e9 28 RSP: 0018:ffffc9000457f040 EFLAGS: 00010212 RAX: 0000000000014d17 RBX: 00000000000003d2 RCX: ffffc9000dd51000 RDX: 0000000000040000 RSI: ffffffff87326794 RDI: 0000000000000003 RBP: ffff888019c8ac80 R08: 00000000000003d4 R09: 0000000000000000 R10: ffffffff87326660 R11: 0000000000000000 R12: 00000000000000e0 R13: 00000000000003d4 R14: ffff888019c8ad00 R15: 00000000000003d2 FS: 00007fb8c821a700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe9af254a8 CR3: 0000000035ef6000 CR4: 00000000003506f0 Call Trace: <TASK> skb_csum_hwoffload_help+0x126/0x1e0 net/core/dev.c:3534 validate_xmit_skb+0xbd5/0xee0 net/core/dev.c:3577 __dev_queue_xmit+0x8c7/0x3620 net/core/dev.c:4100 neigh_hh_output include/net/neighbour.h:522 [inline] neigh_output include/net/neighbour.h:536 [inline] ip_finish_output2+0x14d4/0x2160 net/ipv4/ip_output.c:221 __ip_finish_output net/ipv4/ip_output.c:299 [inline] __ip_finish_output+0x396/0x640 net/ipv4/ip_output.c:281 ip_finish_output+0x32/0x200 net/ipv4/ip_output.c:309 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x196/0x310 net/ipv4/ip_output.c:423 dst_output include/net/dst.h:450 [inline] ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:126 iptunnel_xmit+0x628/0xa50 net/ipv4/ip_tunnel_core.c:82 geneve_xmit_skb drivers/net/geneve.c:972 [inline] geneve_xmit+0x10c8/0x3530 drivers/net/geneve.c:1083 __netdev_start_xmit include/linux/netdevice.h:4608 [inline] netdev_start_xmit include/linux/netdevice.h:4622 [inline] xmit_one net/core/dev.c:3473 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3489 sch_direct_xmit+0x19f/0xbc0 net/sched/sch_generic.c:342 qdisc_restart net/sched/sch_generic.c:407 [inline] __qdisc_run+0x4bc/0x1700 net/sched/sch_generic.c:415 __dev_xmit_skb net/core/dev.c:3758 [inline] __dev_queue_xmit+0x2084/0x3620 net/core/dev.c:4077 packet_snd net/packet/af_packet.c:3052 [inline] packet_sendmsg+0x224c/0x5490 net/packet/af_packet.c:3079 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2036 __do_sys_sendto net/socket.c:2048 [inline] __se_sys_sendto net/socket.c:2044 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2044 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fb8c92a4ae9 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:00007fb8c821a188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fb8c93b7f60 RCX: 00007fb8c92a4ae9 RDX: 0000000000003287 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007fb8c92feff7 R08: 0000000000000000 R09: 00000000000002ff R10: 0000000004000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcf5848fdf R14: 00007fb8c821a300 R15: 0000000000022000 </TASK> Modules linked in: ---[ end trace 53171da6863560e7 ]--- RIP: 0010:skb_checksum_help+0x4b4/0x5b0 net/core/dev.c:3163 Code: fa 45 89 ec e9 59 ff ff ff e8 68 7d 45 fa 48 89 ef 41 bc ea ff ff ff e8 2a f9 ff ff eb c7 e8 53 7d 45 fa 0f 0b e8 4c 7d 45 fa <0f> 0b 4c 89 f7 e8 12 0c 90 fa e9 79 fb ff ff e8 18 0c 90 fa e9 28 RSP: 0018:ffffc9000457f040 EFLAGS: 00010212 RAX: 0000000000014d17 RBX: 00000000000003d2 RCX: ffffc9000dd51000 RDX: 0000000000040000 RSI: ffffffff87326794 RDI: 0000000000000003 RBP: ffff888019c8ac80 R08: 00000000000003d4 R09: 0000000000000000 R10: ffffffff87326660 R11: 0000000000000000 R12: 00000000000000e0 R13: 00000000000003d4 R14: ffff888019c8ad00 R15: 00000000000003d2 FS: 00007fb8c821a700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe9af254a8 CR3: 0000000035ef6000 CR4: 00000000003506f0