netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ===================================================== 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:82 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:1816 [inline] allocate_slab+0x29e/0x1b00 mm/slub.c:1961 new_slab mm/slub.c:2021 [inline] ___slab_alloc+0xb52/0x1da0 mm/slub.c:3035 __slab_alloc mm/slub.c:3122 [inline] slab_alloc_node mm/slub.c:3213 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0xbb3/0x11c0 mm/slub.c:3260 __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:619 nf_hook include/linux/netfilter.h:262 [inline] __ip6_local_out+0x714/0x7d0 net/ipv6/output_core.c:149 ip6_local_out+0xa3/0x1f0 net/ipv6/output_core.c:159 ip6_send_skb+0xf8/0x3f0 net/ipv6/ip6_output.c:1912 udp_v6_send_skb+0x11e0/0x2270 net/ipv6/udp.c:1251 udpv6_sendmsg+0x4c5d/0x4f40 net/ipv6/udp.c:1549 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_sendmsg+0xe11/0x12c0 net/socket.c:2413 ___sys_sendmsg net/socket.c:2467 [inline] __sys_sendmmsg+0xac2/0xf60 net/socket.c:2553 __do_sys_sendmmsg net/socket.c:2582 [inline] __se_sys_sendmmsg net/socket.c:2579 [inline] __x64_sys_sendmmsg+0x11c/0x170 net/socket.c:2579 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae CPU: 0 PID: 9870 Comm: syz-executor.1 Not tainted 5.17.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================