parser_bison: memleak in log prefix string

Release the string after creating the constant expression.

Fixes: 96c909ef46f0 ("src: allow for variables in the log prefix string")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/src/parser_bison.y b/src/parser_bison.y
index 756806d9efdb391e995cab766f67fff0a1e2c951..572e584cfbe48eaeabfd566135d21d3cfcb59d76 100644 (file)
--- a/src/parser_bison.y
+++ b/src/parser_bison.y
@@ -2676,6 +2676,7 @@ log_arg                   :       PREFIX                  string
                                        expr = constant_expr_alloc(&@$, &string_type,
                                                                   BYTEORDER_HOST_ENDIAN,
                                                                   (strlen($2) + 1) * BITS_PER_BYTE, $2);
+                                       xfree($2);
                                        $<stmt>0->log.prefix = expr;
                                        $<stmt>0->log.flags |= STMT_LOG_PREFIX;
                                        break;