diff -up ghostscript-8.64/icclib/icc.c.CVE-2009-0792 ghostscript-8.64/icclib/icc.c
--- ghostscript-8.64/icclib/icc.c.CVE-2009-0792	2009-04-15 16:20:04.000000000 +0100
+++ ghostscript-8.64/icclib/icc.c	2009-04-15 16:20:24.000000000 +0100
@@ -2982,7 +2982,7 @@ static int icmCurve_lookup_fwd(
 			rv |= 1;
 		}
 		ix = (int)floor(val);		/* Coordinate */
-		if (ix > (p->size-2))
+		if (ix < 0 || ix > (p->size-2))
 			ix = (p->size-2);
 		w = val - (double)ix;		/* weight */
 		val = p->data[ix];
@@ -3004,6 +3004,11 @@ static int icmTable_setup_bwd(
 ) {
 	int i;
 
+	if (size > INT_MAX - 2)
+		/* Although rt->size is unsigned long, the rt data
+		 * structure uses int data types to store indices. */
+		return 2;
+
 	rt->size = size;		/* Stash pointers to these away */
 	rt->data = data;
 	
@@ -3022,7 +3027,7 @@ static int icmTable_setup_bwd(
 	rt->qscale = (double)rt->rsize/(rt->rmax - rt->rmin);	/* Scale factor to quantize to */
 	
 	/* Initialize the reverse lookup structures, and get overall min/max */
-	if ((rt->rlists = (int **) icp->al->calloc(icp->al, 1, rt->rsize * sizeof(int *))) == NULL) {
+	if ((rt->rlists = (int **) icp->al->calloc(icp->al, rt->rsize, sizeof(int *))) == NULL) {
 		return 2;
 	}
 
@@ -3035,6 +3040,15 @@ static int icmTable_setup_bwd(
 			int t;
 			t = s; s = e; e = t;
 		}
+		/* s and e should both be in the range [0,rt->rsize]
+		 * now, but let's not rely on floating point
+		 * calculations -- double-check. */
+		if (s < 0)
+			s = 0;
+		if (e < 0)
+			e = 0;
+		if (s >= rt->rsize)
+			s = rt->rsize-1;
 		if (e >= rt->rsize)
 			e = rt->rsize-1;
 
@@ -3053,6 +3067,9 @@ static int icmTable_setup_bwd(
 				as = rt->rlists[j][0];	/* Allocate space for this list */
 				nf = rt->rlists[j][1];	/* Next free location in list */
 				if (nf >= as) {			/* need to expand space */
+					if (as > INT_MAX / 2 / sizeof (int))
+						return 2;
+
 					as *= 2;
 					rt->rlists[j] = (int *) icp->al->realloc(icp->al,rt->rlists[j], sizeof(int) * as);
 					if (rt->rlists[j] == NULL) {
@@ -3104,7 +3121,7 @@ static int icmTable_lookup_bwd(
 		val = rsize_1;
 	ix = (int)floor(val);		/* Coordinate */
 
-	if (ix > (rt->size-2))
+	if (ix < 0 || ix > (rt->size-2))
 		ix = (rt->size-2);
 	if (rt->rlists[ix] != NULL)  {		/* There is a list of fwd candidates */
 		/* For each candidate forward range */
@@ -3131,6 +3148,7 @@ static int icmTable_lookup_bwd(
 	/* We have failed to find an exact value, so return the nearest value */
 	/* (This is slow !) */
 	val = fabs(ival - rt->data[0]);
+	/* rt->size is known to be < INT_MAX */
 	for (k = 0, i = 1; i < rt->size; i++) {
 		double er;
 		er = fabs(ival - rt->data[i]);
@@ -3671,7 +3689,7 @@ static int icmData_allocate(
 	if (p->size != p->_size) {
 		if (p->data != NULL)
 			icp->al->free(icp->al, p->data);
-		if ((p->data = (unsigned char *) icp->al->malloc(icp->al, p->size * sizeof(unsigned char))) == NULL) {
+		if ((p->data = (unsigned char *) icp->al->calloc(icp->al, p->size, sizeof(unsigned char))) == NULL) {
 			sprintf(icp->err,"icmData_alloc: malloc() of icmData data failed");
 			return icp->errc = 2;
 		}
@@ -3887,7 +3905,7 @@ static int icmText_allocate(
 	if (p->size != p->_size) {
 		if (p->data != NULL)
 			icp->al->free(icp->al, p->data);
-		if ((p->data = (char *) icp->al->malloc(icp->al, p->size * sizeof(char))) == NULL) {
+		if ((p->data = (char *) icp->al->calloc(icp->al, p->size, sizeof(char))) == NULL) {
 			sprintf(icp->err,"icmText_alloc: malloc() of icmText data failed");
 			return icp->errc = 2;
 		}
@@ -4301,7 +4319,7 @@ double *in		/* Input array[inputChan] */
 			rv |= 1;
 		}
 		ix = (int)floor(val);		/* Grid coordinate */
-		if (ix > (p->inputEnt-2))
+		if (ix < 0 || ix > (p->inputEnt-2))
 			ix = (p->inputEnt-2);
 		w = val - (double)ix;		/* weight */
 		val = table[ix];
@@ -4360,7 +4378,7 @@ double *in		/* Input array[outputChan] *
 				rv |= 1;
 			}
 			x = (int)floor(val);		/* Grid coordinate */
-			if (x > clutPoints_2)
+			if (x < 0 || x > clutPoints_2)
 				x = clutPoints_2;
 			co[e] = val - (double)x;	/* 1.0 - weight */
 			gp += x * p->dinc[e];		/* Add index offset for base of cube */
@@ -4433,7 +4451,7 @@ double *in		/* Input array[outputChan] *
 				rv |= 1;
 			}
 			x = (int)floor(val);		/* Grid coordinate */
-			if (x > clutPoints_2)
+			if (x < 0 || x > clutPoints_2)
 				x = clutPoints_2;
 			co[e] = val - (double)x;	/* 1.0 - weight */
 			gp += x * p->dinc[e];		/* Add index offset for base of cube */
@@ -4506,7 +4524,7 @@ double *in		/* Input array[outputChan] *
 			rv |= 1;
 		}
 		ix = (int)floor(val);		/* Grid coordinate */
-		if (ix > (p->outputEnt-2))
+		if (ix < 0 || ix > (p->outputEnt-2))
 			ix = (p->outputEnt-2);
 		w = val - (double)ix;		/* weight */
 		val = table[ix];
@@ -6714,7 +6732,7 @@ static int icmTextDescription_allocate(
 	if (p->size != p->_size) {
 		if (p->desc != NULL)
 			icp->al->free(icp->al, p->desc);
-		if ((p->desc = (char *) icp->al->malloc(icp->al, p->size * sizeof(char))) == NULL) {
+		if ((p->desc = (char *) icp->al->calloc(icp->al, p->size, sizeof(char))) == NULL) {
 			sprintf(icp->err,"icmTextDescription_alloc: malloc() of Ascii description failed");
 			return icp->errc = 2;
 		}
@@ -7888,7 +7906,7 @@ static int icmUcrBg_allocate(
 	if (p->size != p->_size) {
 		if (p->string != NULL)
 			icp->al->free(icp->al, p->string);
-		if ((p->string = (char *) icp->al->malloc(icp->al, p->size * sizeof(char))) == NULL) {
+		if ((p->string = (char *) icp->al->calloc(icp->al, p->size, sizeof(char))) == NULL) {
 			sprintf(icp->err,"icmUcrBg_allocate: malloc() of string data failed");
 			return icp->errc = 2;
 		}
@@ -8827,7 +8845,7 @@ static int icmCrdInfo_allocate(
 	if (p->ppsize != p->_ppsize) {
 		if (p->ppname != NULL)
 			icp->al->free(icp->al, p->ppname);
-		if ((p->ppname = (char *) icp->al->malloc(icp->al, p->ppsize * sizeof(char))) == NULL) {
+		if ((p->ppname = (char *) icp->al->calloc(icp->al, p->ppsize, sizeof(char))) == NULL) {
 			sprintf(icp->err,"icmCrdInfo_alloc: malloc() of string data failed");
 			return icp->errc = 2;
 		}
@@ -8837,7 +8855,7 @@ static int icmCrdInfo_allocate(
 		if (p->crdsize[t] != p->_crdsize[t]) {
 			if (p->crdname[t] != NULL)
 				icp->al->free(icp->al, p->crdname[t]);
-			if ((p->crdname[t] = (char *) icp->al->malloc(icp->al, p->crdsize[t] * sizeof(char))) == NULL) {
+			if ((p->crdname[t] = (char *) icp->al->calloc(icp->al, p->crdsize[t], sizeof(char))) == NULL) {
 				sprintf(icp->err,"icmCrdInfo_alloc: malloc() of CRD%d name string failed",t);
 				return icp->errc = 2;
 			}