tony2001 Wed Jun 6 09:43:39 2007 UTC
Modified files:
/php-src/ext/gd/libgd gd.c
/php-src/ext/gd gd.c
Log:
fix several integer overflows in GD
http://cvs.php.net/viewvc.cgi/php-src/ext/gd/libgd/gd.c?r1=1.104&r2=1.105&diff_format=u
Index: php-src/ext/gd/libgd/gd.c
diff -u php-src/ext/gd/libgd/gd.c:1.104 php-src/ext/gd/libgd/gd.c:1.105
--- php-src/ext/gd/libgd/gd.c:1.104 Sat Apr 14 17:30:51 2007
+++ php-src/ext/gd/libgd/gd.c Wed Jun 6 09:43:38 2007
@@ -120,6 +120,15 @@
{
int i;
gdImagePtr im;
+
+ if (overflow2(sx, sy)) {
+ return NULL;
+ }
+
+ if (overflow2(sizeof(unsigned char *), sy)) {
+ return NULL;
+ }
+
im = (gdImage *) gdMalloc(sizeof(gdImage));
memset(im, 0, sizeof(gdImage));
/* Row-major ever since gd 1.3 */
@@ -162,6 +171,19 @@
{
int i;
gdImagePtr im;
+
+ if (overflow2(sx, sy)) {
+ return NULL;
+ }
+
+ if (overflow2(sizeof(unsigned char *), sy)) {
+ return NULL;
+ }
+
+ if (overflow2(sizeof(int), sx)) {
+ return NULL;
+ }
+
im = (gdImage *) gdMalloc(sizeof(gdImage));
memset(im, 0, sizeof(gdImage));
im->tpixels = (int **) gdMalloc(sizeof(int *) * sy);
@@ -2398,6 +2420,14 @@
int *stx, *sty;
/* We only need to use floating point to determine the correct stretch
vector for one line's worth. */
double accum;
+
+ if (overflow2(sizeof(int), srcW)) {
+ return;
+ }
+ if (overflow2(sizeof(int), srcH)) {
+ return;
+ }
+
stx = (int *) gdMalloc (sizeof (int) * srcW);
sty = (int *) gdMalloc (sizeof (int) * srcH);
accum = 0;
@@ -3189,6 +3219,10 @@
return;
}
+ if (overflow2(sizeof(int), n)) {
+ return;
+ }
+
if (c == gdAntiAliased) {
fill_color = im->AA_color;
} else {
@@ -3203,6 +3237,9 @@
while (im->polyAllocated < n) {
im->polyAllocated *= 2;
}
+ if (overflow2(sizeof(int), im->polyAllocated)) {
+ return;
+ }
im->polyInts = (int *) gdRealloc(im->polyInts, sizeof(int) *
im->polyAllocated);
}
miny = p[0].y;
http://cvs.php.net/viewvc.cgi/php-src/ext/gd/gd.c?r1=1.377&r2=1.378&diff_format=u
Index: php-src/ext/gd/gd.c
diff -u php-src/ext/gd/gd.c:1.377 php-src/ext/gd/gd.c:1.378
--- php-src/ext/gd/gd.c:1.377 Sun Jun 3 17:43:13 2007
+++ php-src/ext/gd/gd.c Wed Jun 6 09:43:39 2007
@@ -18,7 +18,7 @@
+----------------------------------------------------------------------+
*/
-/* $Id: gd.c,v 1.377 2007/06/03 17:43:13 pajoye Exp $ */
+/* $Id: gd.c,v 1.378 2007/06/06 09:43:39 tony2001 Exp $ */
/* gd 1.2 is copyright 1994, 1995, Quest Protein Database Center,
Cold Spring Harbor Labs. */
@@ -1579,6 +1579,10 @@
im = gdImageCreateTrueColor(x_size, y_size);
+ if (!im) {
+ RETURN_FALSE;
+ }
+
ZEND_REGISTER_RESOURCE(return_value, im, le_gd);
}
/* }}} */
@@ -2128,6 +2132,10 @@
im = gdImageCreate(x_size, y_size);
+ if (!im) {
+ RETURN_FALSE;
+ }
+
ZEND_REGISTER_RESOURCE(return_value, im, le_gd);
}
/* }}} */
--
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