Merge: tcp_metrics: validate source addr length

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/4947

JIRA: https://issues.redhat.com/browse/RHEL-52031
Upstream Status: linux.git
CVE: CVE-2024-42154

Signed-off-by: Guillaume Nault <gnault@redhat.com>

Approved-by: Florian Westphal <fwestpha@redhat.com>
Approved-by: Antoine Tenart <atenart@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Lucas Zampieri <lzampier@redhat.com>

Author: zampierilucas

net/ipv4/tcp_metrics.c

@@ -601,6 +601,7 @@ static const struct nla_policy tcp_metrics_nl_policy[TCP_METRICS_ATTR_MAX + 1] =
 	[TCP_METRICS_ATTR_ADDR_IPV4]	= { .type = NLA_U32, },
 	[TCP_METRICS_ATTR_ADDR_IPV6]	= { .type = NLA_BINARY,
 					    .len = sizeof(struct in6_addr), },
+	[TCP_METRICS_ATTR_SADDR_IPV4]	= { .type = NLA_U32, },
 	/* Following attributes are not received for GET/DEL,
 	 * we keep them for reference
 	 */