From: Antony Dovgal <tony2001@php.net>
Date: Tue, 20 Oct 2009 12:57:44 +0000 (+0000)
Subject: fix crash on empty doc_root
X-Git-Tag: php-5.3.2RC1~331
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f298e6ce6e8d61d333a8c3970834bcffccdb9825;p=php

fix crash on empty doc_root
---

diff --git a/sapi/cgi/cgi_main.c b/sapi/cgi/cgi_main.c
index f78cc484aa..449e0cf172 100644
--- a/sapi/cgi/cgi_main.c
+++ b/sapi/cgi/cgi_main.c
@@ -828,7 +828,7 @@ static int sapi_cgi_activate(TSRMLS_D)
 			/* DOCUMENT_ROOT should also be defined at this stage..but better check it anyway */
 			if (doc_root) {
 				doc_root_len = strlen(doc_root);
-				if (IS_SLASH(doc_root[doc_root_len - 1])) {
+				if (doc_root_len > 0 && IS_SLASH(doc_root[doc_root_len - 1])) {
 					--doc_root_len;
 				}
 #ifdef PHP_WIN32