From: foobar <sniper@php.net>
Date: Fri, 28 Jun 2002 09:23:50 +0000 (+0000)
Subject: Fix bug: #17528, do not crash with empty string.
X-Git-Tag: php-4.3.0dev_zend2_alpha2~42
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ab0d5fecd33d67c93da764efabbfa126b2ae7381;p=php

Fix bug: #17528, do not crash with empty string.
---

diff --git a/ext/gd/gd.c b/ext/gd/gd.c
index 4ce04e79aa..67dd792275 100644
--- a/ext/gd/gd.c
+++ b/ext/gd/gd.c
@@ -963,7 +963,7 @@ static int _php_image_type (char data[8])
 #ifdef HAVE_LIBGD15
 	/* Based on ext/standard/images.c */
 
-	if (data == NULL)
+	if (data == NULL || strlen(data) <= 0)
 		return -1;
 
 	if (!memcmp(data, php_sig_gd2, 3))