From cdffc358717e436bb67122bb82c1a2a26e050f98 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Thu, 27 Jun 2024 14:25:00 -0700 Subject: [PATCH] tcp_metrics: validate source addr length [ Upstream commit 66be40e622e177316ae81717aa30057ba9e61dff ] I don't see anything checking that TCP_METRICS_ATTR_SADDR_IPV4 is at least 4 bytes long, and the policy doesn't have an entry for this attribute at all (neither does it for IPv6 but v6 is manually validated). Reviewed-by: Eric Dumazet Fixes: 3e7013ddf55a ("tcp: metrics: Allow selective get/del of tcp-metrics based on src IP") Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/ipv4/tcp_metrics.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c index f823a15b973c..95b5ac082a2f 100644 --- a/net/ipv4/tcp_metrics.c +++ b/net/ipv4/tcp_metrics.c @@ -619,6 +619,7 @@ 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 */