From: Dmitry Stogov <dmitry@php.net>
Date: Mon, 21 Jul 2008 17:06:35 +0000 (+0000)
Subject: Added check for small ZEMD_MM_SEG_SIZE
X-Git-Tag: php-5.3.0alpha1~231
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9d4064afc0c69fbee15b6fb404b38b205e2988cc;p=php

Added check for small ZEMD_MM_SEG_SIZE
---

diff --git a/Zend/zend_alloc.c b/Zend/zend_alloc.c
index 4225c1754a..856abc6711 100644
--- a/Zend/zend_alloc.c
+++ b/Zend/zend_alloc.c
@@ -1125,6 +1125,9 @@ ZEND_API zend_mm_heap *zend_mm_startup(void)
 		if (zend_mm_low_bit(seg_size) != zend_mm_high_bit(seg_size)) {
 			fprintf(stderr, "ZEND_MM_SEG_SIZE must be a power of two\n");
 			exit(255);
+		} else if (seg_size < ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE) {
+			fprintf(stderr, "ZEND_MM_SEG_SIZE is too small\n");
+			exit(255);
 		}
 	} else {
 		seg_size = ZEND_MM_SEG_SIZE;