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>

diff --git a/src/netlink_delinearize.c b/src/netlink_delinearize.c
index 068c3bba1159fc71c3027d2cac630b860dba3c0d..3bdd98d47eb0188ab4da8fab3b5d5d0603d63fbd 100644 (file)
--- 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;