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$NetBSD: patch-ao,v 1.3 2006/01/22 23:13:33 tron Exp $
--- xpdf/JBIG2Stream.cc.orig 2005-08-17 06:34:31.000000000 +0100
+++ xpdf/JBIG2Stream.cc 2006-01-22 22:48:31.000000000 +0000
@@ -7,6 +7,7 @@
//========================================================================
#include <aconf.h>
+#include <limits.h>
#ifdef USE_GCC_PRAGMAS
#pragma implementation
@@ -681,9 +682,15 @@
w = wA;
h = hA;
line = (wA + 7) >> 3;
- // need to allocate one extra guard byte for use in combine()
- data = (Guchar *)gmalloc(h * line + 1);
- data[h * line] = 0;
+
+ if (h < 0 || line <= 0 || h >= INT_MAX / line) {
+ data = NULL;
+ }
+ else {
+ // need to allocate one extra guard byte for use in combine()
+ data = (Guchar *)gmalloc(h * line + 1);
+ data[h * line] = 0;
+ }
}
JBIG2Bitmap::JBIG2Bitmap(Guint segNumA, JBIG2Bitmap *bitmap):
@@ -692,6 +699,12 @@
w = bitmap->w;
h = bitmap->h;
line = bitmap->line;
+
+ if (h < 0 || line <= 0 || h >= INT_MAX / line) {
+ data = NULL;
+ return;
+ }
+
// need to allocate one extra guard byte for use in combine()
data = (Guchar *)gmalloc(h * line + 1);
memcpy(data, bitmap->data, h * line);
@@ -720,7 +733,7 @@
}
void JBIG2Bitmap::expand(int newH, Guint pixel) {
- if (newH <= h) {
+ if (newH <= h || line <= 0 || newH >= INT_MAX / line) {
return;
}
// need to allocate one extra guard byte for use in combine()
@@ -2305,6 +2318,15 @@
error(getPos(), "Bad symbol dictionary reference in JBIG2 halftone segment");
return;
}
+ if (gridH == 0 || gridW >= INT_MAX / gridH) {
+ error(getPos(), "Bad size in JBIG2 halftone segment");
+ return;
+ }
+ if (w == 0 || h >= INT_MAX / w) {
+ error(getPos(), "Bad size in JBIG2 bitmap segment");
+ return;
+ }
+
patternDict = (JBIG2PatternDict *)seg;
bpp = 0;
i = 1;
@@ -2936,6 +2958,9 @@
JBIG2BitmapPtr tpgrCXPtr0, tpgrCXPtr1, tpgrCXPtr2;
int x, y, pix;
+ if (w < 0 || h <= 0 || w >= INT_MAX / h)
+ return NULL;
+
bitmap = new JBIG2Bitmap(0, w, h);
bitmap->clearToZero();
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