netlink_delinearize: memleak when parsing concatenation data

netlink_get_register() clones the expression in the register,
release after using it.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/netlink_delinearize.c b/src/netlink_delinearize.c
index 068c3bba..3bdd98d4 100644
--- a/src/netlink_delinearize.c
+++ b/src/netlink_delinearize.c
@@ -200,6 +200,7 @@ static struct expr *netlink_parse_concat_data(struct netlink_parse_ctx *ctx,
 
 		len -= netlink_padded_len(expr->len);
 		reg += netlink_register_space(expr->len);
+		expr_free(expr);
 	}
 	return concat;