netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'.
=====================================================
BUG: KMSAN: uninit-value in get_unique_tuple net/netfilter/nf_nat_core.c:548 [inline]
BUG: KMSAN: uninit-value in nf_nat_setup_info+0x628/0x4a40 net/netfilter/nf_nat_core.c:642
 get_unique_tuple net/netfilter/nf_nat_core.c:548 [inline]
 nf_nat_setup_info+0x628/0x4a40 net/netfilter/nf_nat_core.c:642
 nfnetlink_parse_nat_setup+0xb86/0xcf0
 ctnetlink_parse_nat_setup+0xde/0x390 net/netfilter/nf_conntrack_netlink.c:1845
 ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1920 [inline]
 ctnetlink_create_conntrack net/netfilter/nf_conntrack_netlink.c:2325 [inline]
 ctnetlink_new_conntrack+0x1d5d/0x4240 net/netfilter/nf_conntrack_netlink.c:2452
 nfnetlink_rcv_msg+0xe0a/0xf80 net/netfilter/nfnetlink.c:296
 netlink_rcv_skb+0x40c/0x7e0 net/netlink/af_netlink.c:2494
 nfnetlink_rcv+0x667/0x4740 net/netfilter/nfnetlink.c:654
 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
 netlink_unicast+0x1093/0x1360 net/netlink/af_netlink.c:1343
 netlink_sendmsg+0x14d9/0x1720 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 ____sys_sendmsg+0xe11/0x12c0 net/socket.c:2413
 ___sys_sendmsg net/socket.c:2467 [inline]
 __sys_sendmsg+0x704/0x840 net/socket.c:2496
 __do_sys_sendmsg net/socket.c:2505 [inline]
 __se_sys_sendmsg net/socket.c:2503 [inline]
 __x64_sys_sendmsg+0xe2/0x120 net/socket.c:2503
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 __alloc_pages+0xbbf/0x1090 mm/page_alloc.c:5429
 alloc_pages+0xa08/0xd50
 alloc_slab_page mm/slub.c:1813 [inline]
 allocate_slab+0x29e/0x1b00 mm/slub.c:1958
 new_slab mm/slub.c:2018 [inline]
 ___slab_alloc+0xb3a/0x1d70 mm/slub.c:3032
 __slab_alloc mm/slub.c:3119 [inline]
 slab_alloc_node mm/slub.c:3210 [inline]
 slab_alloc mm/slub.c:3252 [inline]
 kmem_cache_alloc+0xb8a/0x11a0 mm/slub.c:3257
 __nf_conntrack_alloc+0x232/0x7f0 net/netfilter/nf_conntrack_core.c:1553
 init_conntrack+0x29b/0x24c0 net/netfilter/nf_conntrack_core.c:1634
 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1745 [inline]
 nf_conntrack_in+0x1abc/0x3130 net/netfilter/nf_conntrack_core.c:1903
 ipv6_conntrack_local+0x68/0x80 net/netfilter/nf_conntrack_proto.c:414
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0x184/0x490 net/netfilter/core.c:620
 nf_hook include/linux/netfilter.h:262 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ip6_xmit+0x27d1/0x28a0 net/ipv6/ip6_output.c:324
 inet6_csk_xmit+0x5be/0x720 net/ipv6/inet6_connection_sock.c:135
 __tcp_transmit_skb+0x4aba/0x5cc0 net/ipv4/tcp_output.c:1402
 tcp_transmit_skb net/ipv4/tcp_output.c:1420 [inline]
 tcp_send_syn_data net/ipv4/tcp_output.c:3798 [inline]
 tcp_connect+0x305c/0x3cf0 net/ipv4/tcp_output.c:3837
 tcp_v6_connect+0x2909/0x2bc0 net/ipv6/tcp_ipv6.c:334
 __inet_stream_connect+0x456/0x1830 net/ipv4/af_inet.c:660
 tcp_sendmsg_fastopen+0x897/0xc20 net/ipv4/tcp.c:1179
 tcp_sendmsg_locked+0xb3d/0x6d80 net/ipv4/tcp.c:1221
 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1449
 inet6_sendmsg+0x15b/0x1d0 net/ipv6/af_inet6.c:643
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 __sys_sendto+0x9ef/0xc70 net/socket.c:2040
 __do_sys_sendto net/socket.c:2052 [inline]
 __se_sys_sendto net/socket.c:2048 [inline]
 __x64_sys_sendto+0x19c/0x210 net/socket.c:2048
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x44/0xae

CPU: 1 PID: 30709 Comm: syz-executor.5 Not tainted 5.17.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================