- pl for backends

[packages/cups.git] / cups-pdftops.patch

--- pdftops/GfxState.cxx.pdftops	2002-12-17 11:41:20.000000000 +0000
+++ pdftops/GfxState.cxx	2002-12-17 14:13:52.000000000 +0000
@@ -12,6 +12,7 @@
 
 #include <config.h>
 #include <stddef.h>
+#include <limits.h>
 #include <math.h>
 #include <string.h> // for memcpy()
 #include "gmem.h"
@@ -749,6 +750,7 @@
 					   int indexHighA) {
   base = baseA;
   indexHigh = indexHighA;
+  // Checked in GfxIndexedColorSpace::parse
   lookup = (Guchar *)gmalloc((indexHigh + 1) * base->getNComps() *
 			     sizeof(Guchar));
 }
@@ -792,9 +794,13 @@
   }
   indexHighA = obj1.getInt();
   obj1.free();
+  n = baseA->getNComps();
+  if ((unsigned int)(indexHighA + 1) >= INT_MAX / (n * sizeof (Guchar))) {
+    error(-1, "Bad Indexed color space (too high)");
+    goto err1;
+  }
   cs = new GfxIndexedColorSpace(baseA, indexHighA);
   arr->get(3, &obj1);
-  n = baseA->getNComps();
   if (obj1.isStream()) {
     obj1.streamReset();
     for (i = 0; i <= indexHighA; ++i) {
@@ -1674,6 +1680,8 @@
     colorSpace2 = indexedCS->getBase();
     indexHigh = indexedCS->getIndexHigh();
     nComps2 = colorSpace2->getNComps();
+    if ((unsigned int)(indexHigh + 1) >= INT_MAX / (nComps2 * sizeof(double)))
+      goto err1;
     lookup = (double *)gmalloc((indexHigh + 1) * nComps2 * sizeof(double));
     lookup2 = indexedCS->getLookup();
     for (i = 0; i <= indexHigh; ++i) {
@@ -1686,6 +1694,8 @@
     sepCS = (GfxSeparationColorSpace *)colorSpace;
     colorSpace2 = sepCS->getAlt();
     nComps2 = colorSpace2->getNComps();
+    if ((unsigned int)(maxPixel + 1) >= INT_MAX / (nComps2 * sizeof(double)))
+      goto err1;
     lookup = (double *)gmalloc((maxPixel + 1) * nComps2 * sizeof(double));
     sepFunc = sepCS->getFunc();
     for (i = 0; i <= maxPixel; ++i) {
@@ -1696,6 +1706,8 @@
       }
     }
   } else {
+    if ((unsigned int)(maxPixel + 1) >= INT_MAX / (nComps * sizeof(double)))
+      goto err1;
     lookup = (double *)gmalloc((maxPixel + 1) * nComps * sizeof(double));
     for (i = 0; i <= maxPixel; ++i) {
       for (k = 0; k < nComps; ++k) {
@@ -1781,6 +1793,7 @@
 
 GfxSubpath::GfxSubpath(double x1, double y1) {
   size = 16;
+  // safe
   x = (double *)gmalloc(size * sizeof(double));
   y = (double *)gmalloc(size * sizeof(double));
   curve = (GBool *)gmalloc(size * sizeof(GBool));
@@ -1801,6 +1814,7 @@
 GfxSubpath::GfxSubpath(GfxSubpath *subpath) {
   size = subpath->size;
   n = subpath->n;
+  // safe (subpath->size is constrained)
   x = (double *)gmalloc(size * sizeof(double));
   y = (double *)gmalloc(size * sizeof(double));
   curve = (GBool *)gmalloc(size * sizeof(GBool));
@@ -1812,6 +1826,7 @@
 
 void GfxSubpath::lineTo(double x1, double y1) {
   if (n >= size) {
+    if ((unsigned int)(size + 16) >= INT_MAX / sizeof (double)) return;
     size += 16;
     x = (double *)grealloc(x, size * sizeof(double));
     y = (double *)grealloc(y, size * sizeof(double));
@@ -1826,6 +1841,7 @@
 void GfxSubpath::curveTo(double x1, double y1, double x2, double y2,
 			 double x3, double y3) {
   if (n+3 > size) {
+    if ((unsigned int)(size + 16) >= INT_MAX / sizeof (double)) return;
     size += 16;
     x = (double *)grealloc(x, size * sizeof(double));
     y = (double *)grealloc(y, size * sizeof(double));
@@ -1854,6 +1870,7 @@
   size = 16;
   n = 0;
   firstX = firstY = 0;
+  // safe
   subpaths = (GfxSubpath **)gmalloc(size * sizeof(GfxSubpath *));
 }
 
@@ -1875,6 +1892,7 @@
   firstY = firstY1;
   size = size1;
   n = n1;
+  // not sure
   subpaths = (GfxSubpath **)gmalloc(size * sizeof(GfxSubpath *));
   for (i = 0; i < n; ++i)
     subpaths[i] = subpaths1[i]->copy();
@@ -2063,8 +2081,10 @@
     strokePattern = state->strokePattern->copy();
   }
   if (lineDashLength > 0) {
-    lineDash = (double *)gmalloc(lineDashLength * sizeof(double));
-    memcpy(lineDash, state->lineDash, lineDashLength * sizeof(double));
+    if (lineDashLength < INT_MAX / sizeof (double)) {
+      lineDash = (double *)gmalloc(lineDashLength * sizeof(double));
+      memcpy(lineDash, state->lineDash, lineDashLength * sizeof(double));
+    }
   }
   saved = NULL;
 }