src: check if netlink parsing fails

We have to check if mnl_attr_parse() returns an error, which means that it
failed to validate and retrieve the attributes.

Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/rule.c b/src/rule.c
index adb7426..eb9f41c 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -455,7 +455,9 @@ int nft_rule_nlmsg_parse(const struct nlmsghdr *nlh, struct nft_rule *r)
 	struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
 	int ret = 0;
 
-	mnl_attr_parse(nlh, sizeof(*nfg), nft_rule_parse_attr_cb, tb);
+	if (mnl_attr_parse(nlh, sizeof(*nfg), nft_rule_parse_attr_cb, tb) < 0)
+		return -1;
+
 	if (tb[NFTA_RULE_TABLE]) {
 		r->table = strdup(mnl_attr_get_str(tb[NFTA_RULE_TABLE]));
 		r->flags |= (1 << NFT_RULE_ATTR_TABLE);