From: Anatol Belski <ab@php.net>
Date: Thu, 5 Nov 2015 21:11:00 +0000 (+0100)
Subject: fix NULL deref in pdo_firebird
X-Git-Tag: php-7.0.1RC1~156
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c1f893d894d00092aa839e236671a89948f5e431;p=php

fix NULL deref in pdo_firebird

ref #70862
---

diff --git a/ext/pdo_firebird/firebird_statement.c b/ext/pdo_firebird/firebird_statement.c
index 1e0151dc9d..5eaf530415 100644
--- a/ext/pdo_firebird/firebird_statement.c
+++ b/ext/pdo_firebird/firebird_statement.c
@@ -523,12 +523,13 @@ static int firebird_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_dat
 			}
 
 			if (Z_TYPE_P(parameter) == IS_RESOURCE) {
-				php_stream *stm;
+				php_stream *stm = NULL;
 
 				php_stream_from_zval_no_verify(stm, parameter);
 				if (stm) {
+					zend_string *mem =  php_stream_copy_to_mem(stm, PHP_STREAM_COPY_ALL, 0);
 					zval_ptr_dtor(parameter);
-					ZVAL_STR(parameter, php_stream_copy_to_mem(stm, PHP_STREAM_COPY_ALL, 0));
+					ZVAL_STR(parameter, mem ? mem : STR_EMPTY_ALLOC());
 				} else {
 					pdo_raise_impl_error(stmt->dbh, stmt, "HY105", "Expected a stream resource");
 					return 0;