$OpenBSD: patch-lib_Xm-2_0_Xpm_c,v 1.1 2004/09/01 22:57:36 pvalchev Exp $
--- lib/Xm-2.0/Xpm.c.orig	Fri Sep 22 22:35:14 2000
+++ lib/Xm-2.0/Xpm.c	Wed Sep  1 20:30:12 2004
@@ -53,7 +53,7 @@ int xpmParseDataAndCreate(Display *displ
 	XpmAttributes *attributes);
 
 /* 3.2 backward compatibility code */
-LFUNC(CreateOldColorTable, int, (XpmColor *ct, int ncolors,
+LFUNC(CreateOldColorTable, int, (XpmColor *ct, unsigned int ncolors,
 				 XpmColor ***oldct));
 
 LFUNC(FreeOldColorTable, void, (XpmColor **colorTable, int ncolors));
@@ -64,12 +64,15 @@ LFUNC(FreeOldColorTable, void, (XpmColor
 static int
 CreateOldColorTable(ct, ncolors, oldct)
     XpmColor *ct;
-    int ncolors;
+    unsigned int ncolors;
     XpmColor ***oldct;
 {
     XpmColor **colorTable, **color;
     int a;
 
+    if (ncolors >= SIZE_MAX / sizeof(XpmColor *)) 
+	return XpmNoMemory;
+
     colorTable = (XpmColor **) XpmMalloc(ncolors * sizeof(XpmColor *));
     if (!colorTable) {
 	*oldct = NULL;
@@ -1302,6 +1305,8 @@ WritePixels(FILE *file, unsigned int wid
     unsigned int x, y, h;
 
     h = height - 1;
+    if (cpp != 0 && width >= (SIZE_MAX - 3)/cpp) 
+	return XpmNoMemory;    
     p = buf = (char *) XpmMalloc(width * cpp + 3);
     if (!buf)
 	return (XpmNoMemory);
@@ -2289,6 +2294,9 @@ XpmCreateImageFromXpmImage(display, imag
 
     ErrorStatus = XpmSuccess;
 
+    if (image->ncolors >= SIZE_MAX / sizeof(Pixel)) 
+	return (XpmNoMemory);
+
     /* malloc pixels index tables */
     image_pixels = (Pixel *) XpmMalloc(sizeof(Pixel) * image->ncolors);
     if (!image_pixels)
@@ -2461,6 +2469,8 @@ CreateXImage(display, visual, depth, for
 	return (XpmNoMemory);
 
 #if !defined(FOR_MSW) && !defined(AMIGA)
+    if (height != 0 && (*image_return)->bytes_per_line >= SIZE_MAX / height)
+	return XpmNoMemory;
     /* now that bytes_per_line must have been set properly alloc data */
     (*image_return)->data =
 	(char *) XpmMalloc((*image_return)->bytes_per_line * height);
@@ -3531,6 +3541,9 @@ xpmParseDataAndCreate(display, data, ima
 	xpmGetCmt(data, &colors_cmt);
 
     /* malloc pixels index tables */
+    if (ncolors >= SIZE_MAX / sizeof(Pixel)) 
+	return XpmNoMemory;
+
     image_pixels = (Pixel *) XpmMalloc(sizeof(Pixel) * ncolors);
     if (!image_pixels)
 	RETURN(XpmNoMemory);
@@ -3789,8 +3802,9 @@ ParseAndPutPixels(
 	    }
 	    obm = SelectObject(*dc, image->bitmap);
 #endif
+	    if (ncolors > 256)
+		return (XpmFileInvalid);
 
-
 	    memset((char *)colidx, 0, 256 * sizeof(short));
 	    for (a = 0; a < ncolors; a++)
 		colidx[(unsigned char)colorTable[a].string[0]] = a + 1;
@@ -3894,6 +3908,9 @@ if (cidx[f]) XpmFree(cidx[f]);}
 	    char *s;
 	    char buf[BUFSIZ];
 
+	    if (cpp >= sizeof(buf))
+		return (XpmFileInvalid);
+
 	    buf[cpp] = '\0';
 	    if (USE_HASHTABLE) {
 		xpmHashAtom *slot;
@@ -4300,7 +4317,7 @@ xpmGetCmt(mdata, cmt)
 {
     if (!mdata->type)
 	*cmt = NULL;
-    else if (mdata->CommentLength) {
+    else if (data->CommentLength != 0 && data->CommentLength < SIZE_MAX - 1) {
 	*cmt = (char *) XpmMalloc(mdata->CommentLength + 1);
 	strncpy(*cmt, mdata->Comment, mdata->CommentLength);
 	(*cmt)[mdata->CommentLength] = '\0';
@@ -4510,7 +4527,7 @@ HashTableGrows(table)
     xpmHashTable *table;
 {
     xpmHashAtom *atomTable = table->atomTable;
-    int size = table->size;
+    unsigned int size = table->size;
     xpmHashAtom *t, *p;
     int i;
     int oldSize = size;
@@ -4519,6 +4536,8 @@ HashTableGrows(table)
     HASH_TABLE_GROWS
 	table->size = size;
     table->limit = size / 3;
+    if (size >= SIZE_MAX / sizeof(*atomTable)) 
+	return (XpmNoMemory);
     atomTable = (xpmHashAtom *) XpmMalloc(size * sizeof(*atomTable));
     if (!atomTable)
 	return (XpmNoMemory);
@@ -4579,6 +4598,8 @@ xpmHashTableInit(table)
     table->size = INITIAL_HASH_SIZE;
     table->limit = table->size / 3;
     table->used = 0;
+    if (table->size >= SIZE_MAX / sizeof(*atomTable))
+	return (XpmNoMemory);
     atomTable = (xpmHashAtom *) XpmMalloc(table->size * sizeof(*atomTable));
     if (!atomTable)
 	return (XpmNoMemory);
@@ -4899,7 +4920,7 @@ xpmParseValues(data, width, height, ncol
     unsigned int *extensions;
 {
     unsigned int l;
-    char buf[BUFSIZ];
+    char buf[BUFSIZ + 1];
 
     if (!data->format) {		/* XPM 2 or 3 */
 
@@ -5008,10 +5029,10 @@ xpmParseColors(data, ncolors, cpp, color
     XpmColor **colorTablePtr;
     xpmHashTable *hashtable;
 {
-    unsigned int key, l, a, b;
+    unsigned int key, l, a, b, len;
     unsigned int curkey;		/* current color key */
     unsigned int lastwaskey;		/* key read */
-    char buf[BUFSIZ];
+    char buf[BUFSIZ+1];
     char curbuf[BUFSIZ];		/* current buffer */
     char **sptr, *s;
     XpmColor *color;
@@ -5019,6 +5040,8 @@ xpmParseColors(data, ncolors, cpp, color
     char **defaults;
     int ErrorStatus;
 
+    if (ncolors >= SIZE_MAX / sizeof(XpmColor))
+	return (XpmNoMemory);
     colorTable = (XpmColor *) XpmCalloc(ncolors, sizeof(XpmColor));
     if (!colorTable)
 	return (XpmNoMemory);
@@ -5030,6 +5053,10 @@ xpmParseColors(data, ncolors, cpp, color
 	    /*
 	     * read pixel value
 	     */
+	    if (cpp >= SIZE_MAX - 1) {
+		xpmFreeColorTable(colorTable, ncolors);
+		return (XpmNoMemory);
+	    }
 	    color->string = (char *) XpmMalloc(cpp + 1);
 	    if (!color->string) {
 		xpmFreeColorTable(colorTable, ncolors);
@@ -5067,13 +5094,14 @@ xpmParseColors(data, ncolors, cpp, color
 		}
 		if (!lastwaskey && key < NKEYS) {	/* open new key */
 		    if (curkey) {	/* flush string */
-			s = (char *) XpmMalloc(strlen(curbuf) + 1);
+			len = strlen(curbuf) + 1;
+			s = (char *) XpmMalloc(len);
 			if (!s) {
 			    xpmFreeColorTable(colorTable, ncolors);
 			    return (XpmNoMemory);
 			}
 			defaults[curkey] = s;
-			strcpy(s, curbuf);
+			memcpy(s, curbuf, len);
 		    }
 		    curkey = key + 1;	/* set new key  */
 		    *curbuf = '\0';	/* reset curbuf */
@@ -5084,9 +5112,9 @@ xpmParseColors(data, ncolors, cpp, color
 			return (XpmFileInvalid);
 		    }
 		    if (!lastwaskey)
-			strcat(curbuf, " ");	/* append space */
+			strlcat(curbuf, " ", sizeof(curbuf)); /* append space */
 		    buf[l] = '\0';
-		    strcat(curbuf, buf);/* append buf */
+		    strlcat(curbuf, buf, sizeof(curbuf));/* append buf */
 		    lastwaskey = 0;
 		}
 	    }
@@ -5094,12 +5122,13 @@ xpmParseColors(data, ncolors, cpp, color
 		xpmFreeColorTable(colorTable, ncolors);
 		return (XpmFileInvalid);
 	    }
-	    s = defaults[curkey] = (char *) XpmMalloc(strlen(curbuf) + 1);
+	    len = strlen(curbuf) + 1;
+	    s = defaults[curkey] = (char *) XpmMalloc(len);
 	    if (!s) {
 		xpmFreeColorTable(colorTable, ncolors);
 		return (XpmNoMemory);
 	    }
-	    strcpy(s, curbuf);
+	    memcpy(s, curbuf, len);
 	}
     } else {				/* XPM 1 */
 	/* get to the beginning of the first string */
@@ -5112,6 +5141,10 @@ xpmParseColors(data, ncolors, cpp, color
 	    /*
 	     * read pixel value
 	     */
+	    if (cpp >= SIZE_MAX - 1) {
+		xpmFreeColorTable(colorTable, ncolors);
+		return (XpmNoMemory);
+	    }
 	    color->string = (char *) XpmMalloc(cpp + 1);
 	    if (!color->string) {
 		xpmFreeColorTable(colorTable, ncolors);
@@ -5140,16 +5173,17 @@ xpmParseColors(data, ncolors, cpp, color
 	    *curbuf = '\0';		/* init curbuf */
 	    while ((l = xpmNextWord(data, buf, BUFSIZ))) {
 		if (*curbuf != '\0')
-		    strcat(curbuf, " ");/* append space */
+		    strlcat(curbuf, " ", sizeof(curbuf));/* append space */
 		buf[l] = '\0';
-		strcat(curbuf, buf);	/* append buf */
+		strlcat(curbuf, buf, sizeof(curbuf));	/* append buf */
 	    }
-	    s = (char *) XpmMalloc(strlen(curbuf) + 1);
+	    len = strlen(curbuf) + 1;
+	    s = (char *) XpmMalloc(len);
 	    if (!s) {
 		xpmFreeColorTable(colorTable, ncolors);
 		return (XpmNoMemory);
 	    }
-	    strcpy(s, curbuf);
+	    memcpy(s, curbuf, len);
 	    color->c_color = s;
 	    *curbuf = '\0';		/* reset curbuf */
 	    if (a < ncolors - 1)
@@ -5174,6 +5208,9 @@ ParsePixels(data, width, height, ncolors
     unsigned int *iptr, *iptr2;
     unsigned int a, x, y;
 
+    if ((height > 0 && width >= SIZE_MAX / height) ||
+	width * height >= SIZE_MAX / sizeof(unsigned int)) 
+	return XpmNoMemory;
 #ifndef FOR_MSW
     iptr2 = (unsigned int *) XpmMalloc(sizeof(unsigned int) * width * height);
 #else
@@ -5197,6 +5234,9 @@ ParsePixels(data, width, height, ncolors
 	{
 	    unsigned short colidx[256];
 
+	    if (ncolors > 256)
+		return (XpmFileInvalid);
+
 	    memset((char *)colidx, 0, 256 * sizeof(short));
 	    for (a = 0; a < ncolors; a++)
 		colidx[(unsigned char)colorTable[a].string[0]] = a + 1;
@@ -5274,6 +5314,9 @@ if (cidx[f]) XpmFree(cidx[f]);}
 	    char *s;
 	    char buf[BUFSIZ];
 
+	    if (cpp >= sizeof(buf))
+		return (XpmFileInvalid);
+
 	    buf[cpp] = '\0';
 	    if (USE_HASHTABLE) {
 		xpmHashAtom *slot;
@@ -5757,7 +5800,8 @@ LFUNC(MSWGetImagePixels, int, (Display *
 LFUNC(ScanTransparentColor, int, (XpmColor *color, unsigned int cpp,
 				  XpmAttributes *attributes));
 
-LFUNC(ScanOtherColors, int, (Display *display, XpmColor *colors, int ncolors,
+LFUNC(ScanOtherColors, int, (Display *display, XpmColor *colors,
+			     unsigned int ncolors,
 			     Pixel *pixels, unsigned int mask,
 			     unsigned int cpp, XpmAttributes *attributes));
 
@@ -5882,11 +5926,17 @@ XpmCreateXpmImageFromImage(display, imag
     else
 	cpp = 0;
 
+    if ((height > 0 && width >= SIZE_MAX / height) ||
+	width * height >= SIZE_MAX / sizeof(unsigned int))
+	RETURN(XpmNoMemory);
     pmap.pixelindex =
 	(unsigned int *) XpmCalloc(width * height, sizeof(unsigned int));
     if (!pmap.pixelindex)
 	RETURN(XpmNoMemory);
 
+    if (pmap.size >= SIZE_MAX / sizeof(Pixel)) 
+	RETURN(XpmNoMemory);
+
     pmap.pixels = (Pixel *) XpmMalloc(sizeof(Pixel) * pmap.size);
     if (!pmap.pixels)
 	RETURN(XpmNoMemory);
@@ -5951,7 +6001,8 @@ XpmCreateXpmImageFromImage(display, imag
      * get rgb values and a string of char, and possibly a name for each
      * color
      */
-
+    if (pmap.ncolors >= SIZE_MAX / sizeof(XpmColor))
+	RETURN(XpmNoMemory);
     colorTable = (XpmColor *) XpmCalloc(pmap.ncolors, sizeof(XpmColor));
     if (!colorTable)
 	RETURN(XpmNoMemory);
@@ -6010,6 +6061,8 @@ ScanTransparentColor(color, cpp, attribu
 
     /* first get a character string */
     a = 0;
+    if (cpp >= SIZE_MAX - 1)
+	return (XpmNoMemory);
     if (!(s = color->string = (char *) XpmMalloc(cpp + 1)))
 	return (XpmNoMemory);
     *s++ = printable[c = a % MAXPRINTABLE];
@@ -6057,7 +6110,7 @@ static int
 ScanOtherColors(display, colors, ncolors, pixels, mask, cpp, attributes)
     Display *display;
     XpmColor *colors;
-    int ncolors;
+    unsigned int ncolors;
     Pixel *pixels;
     unsigned int mask;
     unsigned int cpp;
@@ -6101,6 +6154,8 @@ ScanOtherColors(display, colors, ncolors
     }
 
     /* first get character strings and rgb values */
+    if (ncolors >= SIZE_MAX / sizeof(XColor) || cpp >= SIZE_MAX - 1)
+	return (XpmNoMemory);
     xcolors = (XColor *) XpmMalloc(sizeof(XColor) * ncolors);
     if (!xcolors)
 	return (XpmNoMemory);