Fixes for CAN-2004-0914 (Thomas Biege).xprint_packagertest_20041125_basexprint_packagertest_20041125

14 files changed, 352 insertions, 156 deletions

diff --git a/src/Attrib.c b/src/Attrib.c
index cf7081c..028c2cb 100644
--- a/src/Attrib.c
+++ b/src/Attrib.c
@@ -32,13 +32,15 @@
 *  Developed by Arnaud Le Hors                                                *
 \*****************************************************************************/
 
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 #include "XpmI.h"
 
 /* 3.2 backward compatibility code */
 LFUNC(CreateOldColorTable, int, (XpmColor *ct, unsigned int ncolors,
 				 XpmColor ***oldct));
 
-LFUNC(FreeOldColorTable, void, (XpmColor **colorTable, int ncolors));
+LFUNC(FreeOldColorTable, void, (XpmColor **colorTable, unsigned int ncolors));
 
 /*
  * Create a colortable compatible with the old style colortable
@@ -50,9 +52,9 @@ CreateOldColorTable(ct, ncolors, oldct)
     XpmColor ***oldct;
 {
     XpmColor **colorTable, **color;
-    int a;
+    unsigned int a;
 
-    if (ncolors >= SIZE_MAX / sizeof(XpmColor *)) 
+    if (ncolors >= UINT_MAX / sizeof(XpmColor *)) 
 	return XpmNoMemory;
 
     colorTable = (XpmColor **) XpmMalloc(ncolors * sizeof(XpmColor *));
@@ -69,9 +71,9 @@ CreateOldColorTable(ct, ncolors, oldct)
 static void
 FreeOldColorTable(colorTable, ncolors)
     XpmColor **colorTable;
-    int ncolors;
+    unsigned int ncolors;
 {
-    int a, b;
+    unsigned int a, b;
     XpmColor **color;
     char **sptr;
 
@@ -122,7 +124,7 @@ XpmFreeExtensions(extensions, nextensions)
     XpmExtension *ext;
     char **sptr;
 
-    if (extensions) {
+    if (extensions  && nextensions > 0) {
 	for (i = 0, ext = extensions; i < nextensions; i++, ext++) {
 	    if (ext->name)
 		XpmFree(ext->name);
diff --git a/src/CrBufFrI.c b/src/CrBufFrI.c
index 9d8545f..66b2f45 100644
--- a/src/CrBufFrI.c
+++ b/src/CrBufFrI.c
@@ -31,6 +31,9 @@
 *                                                                             *
 *  Developed by Arnaud Le Hors                                                *
 \*****************************************************************************/
+
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 /* $XFree86$ */
 
 #include "XpmI.h"
@@ -39,15 +42,17 @@ LFUNC(WriteColors, int, (char **dataptr, unsigned int *data_size,
 			 unsigned int *used_size, XpmColor *colors,
 			 unsigned int ncolors, unsigned int cpp));
 
-LFUNC(WritePixels, void, (char *dataptr, unsigned int *used_size,
+LFUNC(WritePixels, void, (char *dataptr, unsigned int data_size,
+			  unsigned int *used_size,
 			  unsigned int width, unsigned int height,
 			  unsigned int cpp, unsigned int *pixels,
 			  XpmColor *colors));
 
-LFUNC(WriteExtensions, void, (char *dataptr, unsigned int *used_size,
+LFUNC(WriteExtensions, void, (char *dataptr, unsigned int data_size,
+			      unsigned int *used_size,
 			      XpmExtension *ext, unsigned int num));
 
-LFUNC(ExtensionsSize, int, (XpmExtension *ext, unsigned int num));
+LFUNC(ExtensionsSize, unsigned int, (XpmExtension *ext, unsigned int num));
 LFUNC(CommentsSize, int, (XpmInfo *info));
 
 int
@@ -90,10 +95,11 @@ XpmCreateBufferFromImage(display, buffer_return, image, shapeimage, attributes)
 
 #undef RETURN
 #define RETURN(status) \
+do \
 { \
       ErrorStatus = status; \
       goto error; \
-}
+}while(0)
 
 int
 XpmCreateBufferFromXpmImage(buffer_return, image, info)
@@ -107,7 +113,7 @@ XpmCreateBufferFromXpmImage(buffer_return, image, info)
     unsigned int cmts, extensions, ext_size = 0;
     unsigned int l, cmt_size = 0;
     char *ptr = NULL, *p;
-    unsigned int ptr_size, used_size;
+    unsigned int ptr_size, used_size, tmp;
 
     *buffer_return = NULL;
 
@@ -129,7 +135,13 @@ XpmCreateBufferFromXpmImage(buffer_return, image, info)
 #ifdef VOID_SPRINTF
     used_size = strlen(buf);
 #endif
-    ptr_size = used_size + ext_size + cmt_size + 1;
+    ptr_size = used_size + ext_size + cmt_size + 1; /* ptr_size can't be 0 */
+    if(ptr_size <= used_size ||
+       ptr_size <= ext_size  ||
+       ptr_size <= cmt_size)
+    {
+        return XpmNoMemory;
+    }
     ptr = (char *) XpmMalloc(ptr_size);
     if (!ptr)
 	return XpmNoMemory;
@@ -140,7 +152,7 @@ XpmCreateBufferFromXpmImage(buffer_return, image, info)
 #ifndef VOID_SPRINTF
 	used_size +=
 #endif
-	sprintf(ptr + used_size, "/*%s*/\n", info->hints_cmt);
+	snprintf(ptr + used_size, ptr_size-used_size, "/*%s*/\n", info->hints_cmt);
 #ifdef VOID_SPRINTF
 	used_size += strlen(info->hints_cmt) + 5;
 #endif
@@ -158,7 +170,7 @@ XpmCreateBufferFromXpmImage(buffer_return, image, info)
 #ifndef VOID_SPRINTF
 	l +=
 #endif
-	sprintf(buf + l, " %d %d", info->x_hotspot, info->y_hotspot);
+	snprintf(buf + l, sizeof(buf)-l, " %d %d", info->x_hotspot, info->y_hotspot);
 #ifdef VOID_SPRINTF
 	l = strlen(buf);
 #endif
@@ -180,6 +192,8 @@ XpmCreateBufferFromXpmImage(buffer_return, image, info)
     l = strlen(buf);
 #endif
     ptr_size += l;
+    if(ptr_size <= l)
+        RETURN(XpmNoMemory);
     p = (char *) XpmRealloc(ptr, ptr_size);
     if (!p)
 	RETURN(XpmNoMemory);
@@ -192,7 +206,7 @@ XpmCreateBufferFromXpmImage(buffer_return, image, info)
 #ifndef VOID_SPRINTF
 	used_size +=
 #endif
-	sprintf(ptr + used_size, "/*%s*/\n", info->colors_cmt);
+	snprintf(ptr + used_size, ptr_size-used_size, "/*%s*/\n", info->colors_cmt);
 #ifdef VOID_SPRINTF
 	used_size += strlen(info->colors_cmt) + 5;
 #endif
@@ -208,7 +222,12 @@ XpmCreateBufferFromXpmImage(buffer_return, image, info)
      * 4 = 1 (for '"') + 3 (for '",\n')
      * 1 = - 2 (because the last line does not end with ',\n') + 3 (for '};\n')
      */
-    ptr_size += image->height * (image->width * image->cpp + 4) + 1;
+     if(image->width  > UINT_MAX / image->cpp ||
+       (tmp = image->width * image->cpp + 4) <= 4 ||
+        image->height > UINT_MAX / tmp ||
+       (tmp = image->height * tmp + 1) <= 1 ||
+       (ptr_size += tmp) <= tmp)
+	RETURN(XpmNoMemory);
 
     p = (char *) XpmRealloc(ptr, ptr_size);
     if (!p)
@@ -220,17 +239,17 @@ XpmCreateBufferFromXpmImage(buffer_return, image, info)
 #ifndef VOID_SPRINTF
 	used_size +=
 #endif
-	sprintf(ptr + used_size, "/*%s*/\n", info->pixels_cmt);
+	snprintf(ptr + used_size, ptr_size-used_size, "/*%s*/\n", info->pixels_cmt);
 #ifdef VOID_SPRINTF
 	used_size += strlen(info->pixels_cmt) + 5;
 #endif
     }
-    WritePixels(ptr + used_size, &used_size, image->width, image->height,
+    WritePixels(ptr + used_size, ptr_size - used_size, &used_size, image->width, image->height,
 		image->cpp, image->data, image->colorTable);
 
     /* print extensions */
     if (extensions)
-	WriteExtensions(ptr + used_size, &used_size,
+	WriteExtensions(ptr + used_size, ptr_size-used_size, &used_size,
 			info->extensions, info->nextensions);
 
     /* close the array */
@@ -247,6 +266,7 @@ error:
     return (ErrorStatus);
 }
 
+
 static int
 WriteColors(dataptr, data_size, used_size, colors, ncolors, cpp)
     char **dataptr;
@@ -256,7 +276,7 @@ WriteColors(dataptr, data_size, used_size, colors, ncolors, cpp)
     unsigned int ncolors;
     unsigned int cpp;
 {
-    char buf[BUFSIZ];
+    char buf[BUFSIZ] = {0};
     unsigned int a, key, l;
     char *s, *s2;
     char **defaults;
@@ -266,6 +286,8 @@ WriteColors(dataptr, data_size, used_size, colors, ncolors, cpp)
 
 	defaults = (char **) colors;
 	s = buf + 1;
+	if(cpp > (sizeof(buf) - (s-buf)))
+		return(XpmNoMemory);
 	strncpy(s, *defaults++, cpp);
 	s += cpp;
 
@@ -274,14 +296,24 @@ WriteColors(dataptr, data_size, used_size, colors, ncolors, cpp)
 #ifndef VOID_SPRINTF
 		s +=
 #endif
-		sprintf(s, "\t%s %s", xpmColorKeys[key - 1], s2);
+		/* assume C99 compliance */
+		snprintf(s, sizeof(buf) - (s-buf), "\t%s %s", xpmColorKeys[key - 1], s2);
 #ifdef VOID_SPRINTF
 		s += strlen(s);
 #endif
+		/* now let's check if s points out-of-bounds */
+		if((s-buf) > sizeof(buf))
+			return(XpmNoMemory);
 	    }
 	}
+	if(sizeof(buf) - (s-buf) < 4)
+		return(XpmNoMemory);
 	strcpy(s, "\",\n");
 	l = s + 3 - buf;
+	if( *data_size                   >= UINT_MAX-l ||
+	    *data_size + l               <= *used_size ||
+	   (*data_size + l - *used_size) <= sizeof(buf))
+		return(XpmNoMemory);
 	s = (char *) XpmRealloc(*dataptr, *data_size + l);
 	if (!s)
 	    return (XpmNoMemory);
@@ -294,8 +326,9 @@ WriteColors(dataptr, data_size, used_size, colors, ncolors, cpp)
 }
 
 static void
-WritePixels(dataptr, used_size, width, height, cpp, pixels, colors)
+WritePixels(dataptr, data_size, used_size, width, height, cpp, pixels, colors)
     char *dataptr;
+    unsigned int data_size;
     unsigned int *used_size;
     unsigned int width;
     unsigned int height;
@@ -306,27 +339,36 @@ WritePixels(dataptr, used_size, width, height, cpp, pixels, colors)
     char *s = dataptr;
     unsigned int x, y, h;
 
+    if(height <= 1)
+    	return;
+
     h = height - 1;
     for (y = 0; y < h; y++) {
 	*s++ = '"';
 	for (x = 0; x < width; x++, pixels++) {
-	    strncpy(s, colors[*pixels].string, cpp);
+	    if(cpp >= (data_size - (s-dataptr)))
+		return;
+	    strncpy(s, colors[*pixels].string, cpp); /* how can we trust *pixels? :-\ */
 	    s += cpp;
 	}
+	if((data_size - (s-dataptr)) < 4)
+		return;
 	strcpy(s, "\",\n");
 	s += 3;
     }
     /* duplicate some code to avoid a test in the loop */
     *s++ = '"';
     for (x = 0; x < width; x++, pixels++) {
-	strncpy(s, colors[*pixels].string, cpp);
+	if(cpp >= (data_size - (s-dataptr)))
+	    return;
+	strncpy(s, colors[*pixels].string, cpp); /* how can we trust *pixels? */
 	s += cpp;
     }
     *s++ = '"';
     *used_size += s - dataptr;
 }
 
-static int
+static unsigned int
 ExtensionsSize(ext, num)
     XpmExtension *ext;
     unsigned int num;
@@ -335,21 +377,26 @@ ExtensionsSize(ext, num)
     char **line;
 
     size = 0;
+    if(num == 0)
+    	return(0); /* ok? */
     for (x = 0; x < num; x++, ext++) {
 	/* 11 = 10 (for ',\n"XPMEXT ') + 1 (for '"') */
 	size += strlen(ext->name) + 11;
-	a = ext->nlines;
+	a = ext->nlines; /* how can we trust ext->nlines to be not out-of-bounds? */
 	for (y = 0, line = ext->lines; y < a; y++, line++)
 	    /* 4 = 3 (for ',\n"') + 1 (for '"') */
 	    size += strlen(*line) + 4;
     }
     /* 13 is for ',\n"XPMENDEXT"' */
+    if(size > UINT_MAX - 13) /* unlikely */
+    	return(0);
     return size + 13;
 }
 
 static void
-WriteExtensions(dataptr, used_size, ext, num)
+WriteExtensions(dataptr, data_size, used_size, ext, num)
     char *dataptr;
+    unsigned int data_size;
     unsigned int *used_size;
     XpmExtension *ext;
     unsigned int num;
@@ -362,7 +409,7 @@ WriteExtensions(dataptr, used_size, ext, num)
 #ifndef VOID_SPRINTF
 	s +=
 #endif
-	sprintf(s, ",\n\"XPMEXT %s\"", ext->name);
+	snprintf(s, data_size - (s-dataptr), ",\n\"XPMEXT %s\"", ext->name);
 #ifdef VOID_SPRINTF
 	s += strlen(ext->name) + 11;
 #endif
@@ -371,13 +418,13 @@ WriteExtensions(dataptr, used_size, ext, num)
 #ifndef VOID_SPRINTF
 	    s +=
 #endif
-	    sprintf(s, ",\n\"%s\"", *line);
+	    snprintf(s, data_size - (s-dataptr), ",\n\"%s\"", *line);
 #ifdef VOID_SPRINTF
 	    s += strlen(*line) + 4;
 #endif
 	}
     }
-    strcpy(s, ",\n\"XPMENDEXT\"");
+    strncpy(s, ",\n\"XPMENDEXT\"", data_size - (s-dataptr)-1);
     *used_size += s - dataptr + 13;
 }
 
@@ -388,6 +435,7 @@ CommentsSize(info)
     int size = 0;
 
     /* 5 = 2 (for "/_*") + 3 (for "*_/\n") */
+    /* wrap possible but *very* unlikely */
     if (info->hints_cmt)
 	size += 5 + strlen(info->hints_cmt);
 
diff --git a/src/CrDatFrI.c b/src/CrDatFrI.c
index 8bec109..37e7f8c 100644
--- a/src/CrDatFrI.c
+++ b/src/CrDatFrI.c
@@ -33,13 +33,16 @@
 \*****************************************************************************/
 /* $XFree86$ */
 
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 #include "XpmI.h"
 
 LFUNC(CreateColors, int, (char **dataptr, unsigned int *data_size,
 			  XpmColor *colors, unsigned int ncolors,
 			  unsigned int cpp));
 
-LFUNC(CreatePixels, void, (char **dataptr, unsigned int width,
+LFUNC(CreatePixels, void, (char **dataptr, unsigned int data_size,
+			   unsigned int width,
 			   unsigned int height, unsigned int cpp,
 			   unsigned int *pixels, XpmColor *colors));
 
@@ -47,7 +50,8 @@ LFUNC(CountExtensions, void, (XpmExtension *ext, unsigned int num,
 			      unsigned int *ext_size,
 			      unsigned int *ext_nlines));
 
-LFUNC(CreateExtensions, void, (char **dataptr, unsigned int offset,
+LFUNC(CreateExtensions, void, (char **dataptr, unsigned int data_size,
+			       unsigned int offset,
 			       XpmExtension *ext, unsigned int num,
 			       unsigned int ext_nlines));
 
@@ -88,10 +92,11 @@ XpmCreateDataFromImage(display, data_return, image, shapeimage, attributes)
 
 #undef RETURN
 #define RETURN(status) \
+do \
 { \
       ErrorStatus = status; \
       goto exit; \
-}
+} while(0)
 
 int
 XpmCreateDataFromXpmImage(data_return, image, info)
@@ -122,11 +127,17 @@ XpmCreateDataFromXpmImage(data_return, image, info)
      * alloc a temporary array of char pointer for the header section which
      * is the hints line + the color table lines
      */
-    header_nlines = 1 + image->ncolors;
+    header_nlines = 1 + image->ncolors; /* this may wrap and/or become 0 */
+
+    /* 2nd check superfluous if we do not need header_nlines any further */
+    if(header_nlines <= image->ncolors ||
+       header_nlines >= UINT_MAX / sizeof(char *))
+    	return(XpmNoMemory);
+
     header_size = sizeof(char *) * header_nlines;
-    if (header_size >= SIZE_MAX / sizeof(char *))
+    if (header_size >= UINT_MAX / sizeof(char *))
 	return (XpmNoMemory);
-    header = (char **) XpmCalloc(header_size, sizeof(char *));
+    header = (char **) XpmCalloc(header_size, sizeof(char *)); /* can we trust image->ncolors */
     if (!header)
 	return (XpmNoMemory);
 
@@ -170,8 +181,22 @@ XpmCreateDataFromXpmImage(data_return, image, info)
 
     /* now we know the size needed, alloc the data and copy the header lines */
     offset = image->width * image->cpp + 1;
-    data_size = header_size + (image->height + ext_nlines) * sizeof(char *)
-	+ image->height * offset + ext_size;
+
+    if(offset <= image->width || offset <= image->cpp)
+	RETURN(XpmNoMemory);
+
+    if( (image->height + ext_nlines) >= UINT_MAX / sizeof(char *))
+	RETURN(XpmNoMemory);
+    data_size = (image->height + ext_nlines) * sizeof(char *);
+
+    if (image->height > UINT_MAX / offset ||
+        image->height * offset > UINT_MAX - data_size)
+	RETURN(XpmNoMemory);
+    data_size += image->height * offset;
+
+    if( (header_size + ext_size) >= (UINT_MAX - data_size) )
+	RETURN(XpmNoMemory);
+    data_size += header_size + ext_size;
 
     data = (char **) XpmMalloc(data_size);
     if (!data)
@@ -179,8 +204,10 @@ XpmCreateDataFromXpmImage(data_return, image, info)
 
     data_nlines = header_nlines + image->height + ext_nlines;
     *data = (char *) (data + data_nlines);
+
+    /* can header have less elements then n suggests? */
     n = image->ncolors;
-    for (l = 0, sptr = data, sptr2 = header; l <= n; l++, sptr++, sptr2++) {
+    for (l = 0, sptr = data, sptr2 = header; l <= n && sptr && sptr2; l++, sptr++, sptr2++) {
 	strcpy(*sptr, *sptr2);
 	*(sptr + 1) = *sptr + strlen(*sptr2) + 1;
     }
@@ -189,12 +216,13 @@ XpmCreateDataFromXpmImage(data_return, image, info)
     data[header_nlines] = (char *) data + header_size
 	+ (image->height + ext_nlines) * sizeof(char *);
 
-    CreatePixels(data + header_nlines, image->width, image->height,
+    CreatePixels(data + header_nlines, data_size-header_nlines, image->width, image->height,
 		 image->cpp, image->data, image->colorTable);
 
     /* print extensions */
     if (extensions)
-	CreateExtensions(data + header_nlines + image->height - 1, offset,
+	CreateExtensions(data + header_nlines + image->height - 1,
+			 data_size - header_nlines - image->height + 1, offset,
 			 info->extensions, info->nextensions,
 			 ext_nlines);
 
@@ -225,23 +253,34 @@ CreateColors(dataptr, data_size, colors, ncolors, cpp)
     char *s, *s2;
     char **defaults;
 
+    /* can ncolors be trusted here? */
     for (a = 0; a < ncolors; a++, colors++, dataptr++) {
 
 	defaults = (char **) colors;
+	if(sizeof(buf) <= cpp)
+	    return(XpmNoMemory);
 	strncpy(buf, *defaults++, cpp);
 	s = buf + cpp;
 
+	if(sizeof(buf) <= (s-buf))
+		return XpmNoMemory;
+
 	for (key = 1; key <= NKEYS; key++, defaults++) {
 	    if ((s2 = *defaults)) {
 #ifndef VOID_SPRINTF
 		s +=
 #endif
-		sprintf(s, "\t%s %s", xpmColorKeys[key - 1], s2);
+		/* assume C99 compliance */
+			snprintf(s, sizeof(buf)-(s-buf), "\t%s %s", xpmColorKeys[key - 1], s2);
 #ifdef VOID_SPRINTF
 		s += strlen(s);
 #endif
+		/* does s point out-of-bounds? */
+		if(sizeof(buf) < (s-buf))
+			return XpmNoMemory;
 	    }
 	}
+	/* what about using strdup()? */
 	l = s - buf + 1;
 	s = (char *) XpmMalloc(l);
 	if (!s)
@@ -253,8 +292,9 @@ CreateColors(dataptr, data_size, colors, ncolors, cpp)
 }
 
 static void
-CreatePixels(dataptr, width, height, cpp, pixels, colors)
+CreatePixels(dataptr, data_size, width, height, cpp, pixels, colors)
     char **dataptr;
+    unsigned int data_size;
     unsigned int width;
     unsigned int height;
     unsigned int cpp;
@@ -264,21 +304,38 @@ CreatePixels(dataptr, width, height, cpp, pixels, colors)
     char *s;
     unsigned int x, y, h, offset;
 
+    if(height <= 1)
+    	return;
+
     h = height - 1;
+
     offset = width * cpp + 1;
+
+    if(offset <= width || offset <= cpp)
+    	return;
+
+    /* why trust h? */
     for (y = 0; y < h; y++, dataptr++) {
 	s = *dataptr;
+	/* why trust width? */
 	for (x = 0; x < width; x++, pixels++) {
-	    strncpy(s, colors[*pixels].string, cpp);
+	    if(cpp > (data_size - (s - *dataptr)))
+	    	return;
+	    strncpy(s, colors[*pixels].string, cpp); /* why trust pixel? */
 	    s += cpp;
 	}
 	*s = '\0';
+	if(offset > data_size)
+		return;
 	*(dataptr + 1) = *dataptr + offset;
     }
     /* duplicate some code to avoid a test in the loop */
     s = *dataptr;
+    /* why trust width? */
     for (x = 0; x < width; x++, pixels++) {
-	strncpy(s, colors[*pixels].string, cpp);
+	if(cpp > data_size - (s - *dataptr))
+	    	return;
+	strncpy(s, colors[*pixels].string, cpp); /* why should we trust *pixel? */
 	s += cpp;
     }
     *s = '\0';
@@ -311,8 +368,9 @@ CountExtensions(ext, num, ext_size, ext_nlines)
 }
 
 static void
-CreateExtensions(dataptr, offset, ext, num, ext_nlines)
+CreateExtensions(dataptr, data_size, offset, ext, num, ext_nlines)
     char **dataptr;
+    unsigned int data_size;
     unsigned int offset;
     XpmExtension *ext;
     unsigned int num;
@@ -325,12 +383,12 @@ CreateExtensions(dataptr, offset, ext, num, ext_nlines)
     dataptr++;
     a = 0;
     for (x = 0; x < num; x++, ext++) {
-	sprintf(*dataptr, "XPMEXT %s", ext->name);
+	snprintf(*dataptr, data_size, "XPMEXT %s", ext->name);
 	a++;
 	if (a < ext_nlines)
 	    *(dataptr + 1) = *dataptr + strlen(ext->name) + 8;
 	dataptr++;
-	b = ext->nlines;
+	b = ext->nlines; /* can we trust these values? */
 	for (y = 0, line = ext->lines; y < b; y++, line++) {
 	    strcpy(*dataptr, *line);
 	    a++;
diff --git a/src/RdFToBuf.c b/src/RdFToBuf.c
index 898a9fc..f6ad75d 100644
--- a/src/RdFToBuf.c
+++ b/src/RdFToBuf.c
@@ -37,6 +37,8 @@
  * HeDu (hedu@cul-ipn.uni-kiel.de) 4/94
  */
 
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 #include "XpmI.h"
 #include <sys/stat.h>
 #if !defined(FOR_MSW) && !defined(WIN32)
@@ -58,7 +60,8 @@ XpmReadFileToBuffer(filename, buffer_return)
     char *filename;
     char **buffer_return;
 {
-    int fd, fcheck, len;
+    int fd, fcheck;
+    off_t len;
     char *ptr;
     struct stat stats;
     FILE *fp;
@@ -82,7 +85,7 @@ XpmReadFileToBuffer(filename, buffer_return)
 	close(fd);
 	return XpmOpenFailed;
     }
-    len = (int) stats.st_size;
+    len = stats.st_size;
     ptr = (char *) XpmMalloc(len + 1);
     if (!ptr) {
 	fclose(fp);
diff --git a/src/RdFToI.c b/src/RdFToI.c
index d1242c4..3450263 100644
--- a/src/RdFToI.c
+++ b/src/RdFToI.c
@@ -33,6 +33,8 @@
 \*****************************************************************************/
 /* $XFree86$ */
 
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 #include "XpmI.h"
 #include <sys/stat.h>
 #if !defined(NO_ZPIPE) && defined(WIN32)
@@ -123,6 +125,12 @@ XpmReadFileToXpmImage(filename, image, info)
 /*
  * open the given file to be read as an xpmData which is returned.
  */
+#ifndef NO_ZPIPE
+	FILE *s_popen(char *cmd, const char *type);
+#else
+#	define s_popen popen
+#endif
+
 static int
 OpenReadFile(filename, mdata)
     char *filename;
@@ -141,17 +149,21 @@ OpenReadFile(filename, mdata)
 	mdata->type = XPMFILE;
     } else {
 #ifndef NO_ZPIPE
-	int len = strlen(filename);
+	size_t len = strlen(filename);
+
+	if(len == 0                        ||
+	   filename[len-1] == '/')
+		return(XpmOpenFailed);
 	if ((len > 2) && !strcmp(".Z", filename + (len - 2))) {
 	    mdata->type = XPMPIPE;
-	    sprintf(buf, "uncompress -c \"%s\"", filename);
-	    if (!(mdata->stream.file = popen(buf, "r")))
+	    snprintf(buf, sizeof(buf), "uncompress -c \"%s\"", filename);
+	    if (!(mdata->stream.file = s_popen(buf, "r")))
 		return (XpmOpenFailed);
 
 	} else if ((len > 3) && !strcmp(".gz", filename + (len - 3))) {
 	    mdata->type = XPMPIPE;
-	    sprintf(buf, "gunzip -qc \"%s\"", filename);
-	    if (!(mdata->stream.file = popen(buf, "r")))
+	    snprintf(buf, sizeof(buf), "gunzip -qc \"%s\"", filename);
+	    if (!(mdata->stream.file = s_popen(buf, "r")))
 		return (XpmOpenFailed);
 
 	} else {
@@ -159,19 +171,19 @@ OpenReadFile(filename, mdata)
 	    if (!(compressfile = (char *) XpmMalloc(len + 4)))
 		return (XpmNoMemory);
 
-	    sprintf(compressfile, "%s.Z", filename);
+	    snprintf(compressfile, len+4, "%s.Z", filename);
 	    if (!stat(compressfile, &status)) {
-		sprintf(buf, "uncompress -c \"%s\"", compressfile);
-		if (!(mdata->stream.file = popen(buf, "r"))) {
+		snprintf(buf, sizeof(buf), "uncompress -c \"%s\"", compressfile);
+		if (!(mdata->stream.file = s_popen(buf, "r"))) {
 		    XpmFree(compressfile);
 		    return (XpmOpenFailed);
 		}
 		mdata->type = XPMPIPE;
 	    } else {
-		sprintf(compressfile, "%s.gz", filename);
+		snprintf(compressfile, len+4, "%s.gz", filename);
 		if (!stat(compressfile, &status)) {
-		    sprintf(buf, "gunzip -c \"%s\"", compressfile);
-		    if (!(mdata->stream.file = popen(buf, "r"))) {
+		    snprintf(buf, sizeof(buf), "gunzip -c \"%s\"", compressfile);
+		    if (!(mdata->stream.file = s_popen(buf, "r"))) {
 			XpmFree(compressfile);
 			return (XpmOpenFailed);
 		    }
@@ -217,7 +229,7 @@ xpmDataClose(mdata)
 	break;
 #ifndef NO_ZPIPE
     case XPMPIPE:
-	pclose(mdata->stream.file);
+	fclose(mdata->stream.file);
 	break;
 #endif
     }
diff --git a/src/WrFFrBuf.c b/src/WrFFrBuf.c
index 3ed6685..a206b5c 100644
--- a/src/WrFFrBuf.c
+++ b/src/WrFFrBuf.c
@@ -32,6 +32,8 @@
 *  Developed by Arnaud Le Hors                                                *
 \*****************************************************************************/
 
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 #include "XpmI.h"
 
 int
@@ -49,7 +51,7 @@ XpmWriteFileFromBuffer(filename, buffer)
     fcheck = fwrite(buffer, len, 1, fp);
     fclose(fp);
     if (fcheck != 1)
-	return XpmOpenFailed;
+	return XpmOpenFailed; /* maybe use a better return value */
 
     return XpmSuccess;
 }
diff --git a/src/WrFFrI.c b/src/WrFFrI.c
index 5ef5814..e5c9b4b 100644
--- a/src/WrFFrI.c
+++ b/src/WrFFrI.c
@@ -38,6 +38,8 @@
  * Lorens Younes (d93-hyo@nada.kth.se) 4/96
  */
 
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 #include "XpmI.h"
 #if !defined(NO_ZPIPE) && defined(WIN32)
 # define popen _popen
@@ -98,7 +100,7 @@ XpmWriteFileFromXpmImage(filename, image, info)
     XpmInfo *info;
 {
     xpmData mdata;
-    char *name, *dot, *s, new_name[BUFSIZ];
+    char *name, *dot, *s, new_name[BUFSIZ] = {0};
     int ErrorStatus;
 
     /* open file to write */
@@ -121,7 +123,8 @@ XpmWriteFileFromXpmImage(filename, image, info)
 #endif
 	/* let's try to make a valid C syntax name */
 	if (index(name, '.')) {
-	    strcpy(new_name, name);
+	    strncpy(new_name, name, sizeof(new_name));
+	    new_name[sizeof(new_name)-1] = 0;
 	    /* change '.' to '_' */
 	    name = s = new_name;
 	    while ((dot = index(s, '.'))) {
@@ -131,7 +134,8 @@ XpmWriteFileFromXpmImage(filename, image, info)
 	}
 	if (index(name, '-')) {
 	    if (name != new_name) {
-		strcpy(new_name, name);
+		strncpy(new_name, name, sizeof(new_name));
+		new_name[sizeof(new_name)-1] = 0;
 		name = new_name;
 	    }
 	    /* change '-' to '_' */
@@ -248,7 +252,7 @@ WritePixels(file, width, height, cpp, pixels, colors)
     unsigned int x, y, h;
 
     h = height - 1;
-    if (cpp != 0 && width >= (SIZE_MAX - 3)/cpp) 
+    if (cpp != 0 && width >= (UINT_MAX - 3)/cpp)
 	return XpmNoMemory;    
     p = buf = (char *) XpmMalloc(width * cpp + 3);
     if (!buf)
@@ -300,6 +304,11 @@ WriteExtensions(file, ext, num)
 /*
  * open the given file to be written as an xpmData which is returned
  */
+#ifndef NO_ZPIPE
+	FILE *s_popen(char *cmd, const char *type);
+#else
+#	define s_popen popen
+#endif
 static int
 OpenWriteFile(filename, mdata)
     char *filename;
@@ -315,16 +324,23 @@ OpenWriteFile(filename, mdata)
 	mdata->type = XPMFILE;
     } else {
 #ifndef NO_ZPIPE
-	int len = strlen(filename);
+	size_t len = strlen(filename);
+
+	if(len == 0                        ||
+	   filename[0] == '/'              ||
+	   strstr(filename, "../") != NULL ||
+	   filename[len-1] == '/')
+		return(XpmOpenFailed);
+
 	if (len > 2 && !strcmp(".Z", filename + (len - 2))) {
-	    sprintf(buf, "compress > \"%s\"", filename);
-	    if (!(mdata->stream.file = popen(buf, "w")))
+	    snprintf(buf, sizeof(buf), "compress > \"%s\"", filename);
+	    if (!(mdata->stream.file = s_popen(buf, "w")))
 		return (XpmOpenFailed);
 
 	    mdata->type = XPMPIPE;
 	} else if (len > 3 && !strcmp(".gz", filename + (len - 3))) {
-	    sprintf(buf, "gzip -q > \"%s\"", filename);
-	    if (!(mdata->stream.file = popen(buf, "w")))
+	    snprintf(buf, sizeof(buf), "gzip -q > \"%s\"", filename);
+	    if (!(mdata->stream.file = s_popen(buf, "w")))
 		return (XpmOpenFailed);
 
 	    mdata->type = XPMPIPE;
@@ -355,7 +371,7 @@ xpmDataClose(mdata)
 	break;
 #ifndef NO_ZPIPE
     case XPMPIPE:
-	pclose(mdata->stream.file);
+	fclose(mdata->stream.file);
 	break;
 #endif
     }
diff --git a/src/XpmI.h b/src/XpmI.h
index 5c5b900..70844ac 100644
--- a/src/XpmI.h
+++ b/src/XpmI.h
@@ -49,8 +49,10 @@
  * lets try to solve include files
  */
 
+#include <sys/types.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <limits.h>
 /* stdio.h doesn't declare popen on a Sequent DYNIX OS */
 #ifdef sequent
 extern FILE *popen();
diff --git a/src/create.c b/src/create.c
index 8710c18..a1e274d 100644
--- a/src/create.c
+++ b/src/create.c
@@ -45,6 +45,8 @@
  * Lorens Younes (d93-hyo@nada.kth.se) 4/96
  */
 
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 #include "XpmI.h"
 #include <ctype.h>
 
@@ -586,7 +588,7 @@ CreateColors(display, attributes, colors, ncolors, image_pixels, mask_pixels,
 	     */
 	} else {
 #endif
-	    int i;
+	    unsigned int i;
 
 #ifndef AMIGA
 	    ncols = visual->map_entries;
@@ -746,12 +748,14 @@ FreeColors(display, colormap, pixels, n, closure)
 
 
 /* function call in case of error */
+
 #undef RETURN
 #define RETURN(status) \
+do \
 { \
       ErrorStatus = status; \
       goto error; \
-}
+} while(0)
 
 int
 XpmCreateImageFromXpmImage(display, image,
@@ -817,7 +821,7 @@ XpmCreateImageFromXpmImage(display, image,
 
     ErrorStatus = XpmSuccess;
 
-    if (image->ncolors >= SIZE_MAX / sizeof(Pixel)) 
+    if (image->ncolors >= UINT_MAX / sizeof(Pixel)) 
 	return (XpmNoMemory);
 
     /* malloc pixels index tables */
@@ -992,9 +996,13 @@ CreateXImage(display, visual, depth, format, width, height, image_return)
 	return (XpmNoMemory);
 
 #if !defined(FOR_MSW) && !defined(AMIGA)
-    if (height != 0 && (*image_return)->bytes_per_line >= SIZE_MAX / height)
+    if (height != 0 && (*image_return)->bytes_per_line >= INT_MAX / height) {
+	XDestroyImage(*image_return);
 	return XpmNoMemory;
+    }
     /* now that bytes_per_line must have been set properly alloc data */
+    if((*image_return)->bytes_per_line == 0 ||  height == 0)
+    	return XpmNoMemory;
     (*image_return)->data =
 	(char *) XpmMalloc((*image_return)->bytes_per_line * height);
 
@@ -1023,7 +1031,7 @@ CreateXImage(display, visual, depth, format, width, height, image_return)
 LFUNC(_putbits, void, (register char *src, int dstoffset,
 		       register int numbits, register char *dst));
 
-LFUNC(_XReverse_Bytes, int, (register unsigned char *bpt, register int nb));
+LFUNC(_XReverse_Bytes, int, (register unsigned char *bpt, register unsigned int nb));
 
 static unsigned char Const _reverse_byte[0x100] = {
     0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
@@ -1063,12 +1071,12 @@ static unsigned char Const _reverse_byte[0x100] = {
 static int
 _XReverse_Bytes(bpt, nb)
     register unsigned char *bpt;
-    register int nb;
+    register unsigned int nb;
 {
     do {
 	*bpt = _reverse_byte[*bpt];
 	bpt++;
-    } while (--nb > 0);
+    } while (--nb > 0); /* is nb user-controled? */
     return 0;
 }
 
@@ -1207,7 +1215,7 @@ PutImagePixels(image, width, height, pixelindex, pixels)
     register char *src;
     register char *dst;
     register unsigned int *iptr;
-    register int x, y, i;
+    register unsigned int x, y, i;
     register char *data;
     Pixel pixel, px;
     int nbytes, depth, ibu, ibpp;
@@ -1217,8 +1225,8 @@ PutImagePixels(image, width, height, pixelindex, pixels)
     depth = image->depth;
     if (depth == 1) {
 	ibu = image->bitmap_unit;
-	for (y = 0; y < height; y++)
-	    for (x = 0; x < width; x++, iptr++) {
+	for (y = 0; y < height; y++) /* how can we trust height */
+	    for (x = 0; x < width; x++, iptr++) { /* how can we trust width */
 		pixel = pixels[*iptr];
 		for (i = 0, px = pixel; i < sizeof(unsigned long);
 		     i++, px >>= 8)
@@ -1293,12 +1301,12 @@ PutImagePixels32(image, width, height, pixelindex, pixels)
 {
     unsigned char *data;
     unsigned int *iptr;
-    int y;
+    unsigned int y;
     Pixel pixel;
 
 #ifdef WITHOUT_SPEEDUPS
 
-    int x;
+    unsigned int x;
     unsigned char *addr;
 
     data = (unsigned char *) image->data;
@@ -1335,7 +1343,7 @@ PutImagePixels32(image, width, height, pixelindex, pixels)
 
 #else  /* WITHOUT_SPEEDUPS */
 
-    int bpl = image->bytes_per_line;
+    unsigned int bpl = image->bytes_per_line;
     unsigned char *data_ptr, *max_data;
 
     data = (unsigned char *) image->data;
@@ -1403,11 +1411,11 @@ PutImagePixels16(image, width, height, pixelindex, pixels)
 {
     unsigned char *data;
     unsigned int *iptr;
-    int y;
+    unsigned int y;
 
 #ifdef WITHOUT_SPEEDUPS
 
-    int x;
+    unsigned int x;
     unsigned char *addr;
 
     data = (unsigned char *) image->data;
@@ -1431,7 +1439,7 @@ PutImagePixels16(image, width, height, pixelindex, pixels)
 
     Pixel pixel;
 
-    int bpl = image->bytes_per_line;
+    unsigned int bpl = image->bytes_per_line;
     unsigned char *data_ptr, *max_data;
 
     data = (unsigned char *) image->data;
@@ -1484,11 +1492,11 @@ PutImagePixels8(image, width, height, pixelindex, pixels)
 {
     char *data;
     unsigned int *iptr;
-    int y;
+    unsigned int y;
 
 #ifdef WITHOUT_SPEEDUPS
 
-    int x;
+    unsigned int x;
 
     data = image->data;
     iptr = pixelindex;
@@ -1498,7 +1506,7 @@ PutImagePixels8(image, width, height, pixelindex, pixels)
 
 #else  /* WITHOUT_SPEEDUPS */
 
-    int bpl = image->bytes_per_line;
+    unsigned int bpl = image->bytes_per_line;
     char *data_ptr, *max_data;
 
     data = image->data;
@@ -1533,12 +1541,12 @@ PutImagePixels1(image, width, height, pixelindex, pixels)
 	PutImagePixels(image, width, height, pixelindex, pixels);
     else {
 	unsigned int *iptr;
-	int y;
+	unsigned int y;
 	char *data;
 
 #ifdef WITHOUT_SPEEDUPS
 
-	int x;
+	unsigned int x;
 
 	data = image->data;
 	iptr = pixelindex;
@@ -1761,6 +1769,9 @@ PutPixel1(ximage, x, y, pixel)
     Pixel px;
     int nbytes;
 
+    if(x < 0 || y < 0)
+    	return 0;
+
     for (i=0, px=pixel; i<sizeof(unsigned long); i++, px>>=8)
 	((unsigned char *)&pixel)[i] = px;
     src = &ximage->data[XYINDEX(x, y, ximage)];
@@ -1791,7 +1802,10 @@ PutPixel(ximage, x, y, pixel)
     register char *dst;
     register int i;
     Pixel px;
-    int nbytes, ibpp;
+    unsigned int nbytes, ibpp;
+
+    if(x < 0 || y < 0)
+    	return 0;
 
     ibpp = ximage->bits_per_pixel;
     if (ximage->depth == 4)
@@ -1825,6 +1839,9 @@ PutPixel32(ximage, x, y, pixel)
 {
     unsigned char *addr;
 
+    if(x < 0 || y < 0)
+    	return 0;
+
     addr = &((unsigned char *)ximage->data) [ZINDEX32(x, y, ximage)];
     *((unsigned long *)addr) = pixel;
     return 1;
@@ -1840,6 +1857,9 @@ PutPixel32MSB(ximage, x, y, pixel)
 {
     unsigned char *addr;
 
+    if(x < 0 || y < 0)
+    	return 0;
+
     addr = &((unsigned char *)ximage->data) [ZINDEX32(x, y, ximage)];
     addr[0] = pixel >> 24;
     addr[1] = pixel >> 16;
@@ -1857,6 +1877,9 @@ PutPixel32LSB(ximage, x, y, pixel)
 {
     unsigned char *addr;
 
+    if(x < 0 || y < 0)
+    	return 0;
+
     addr = &((unsigned char *)ximage->data) [ZINDEX32(x, y, ximage)];
     addr[3] = pixel >> 24;
     addr[2] = pixel >> 16;
@@ -1874,6 +1897,9 @@ PutPixel16MSB(ximage, x, y, pixel)
 {
     unsigned char *addr;
     
+    if(x < 0 || y < 0)
+    	return 0;
+
     addr = &((unsigned char *)ximage->data) [ZINDEX16(x, y, ximage)];
     addr[0] = pixel >> 8;
     addr[1] = pixel;
@@ -1889,6 +1915,9 @@ PutPixel16LSB(ximage, x, y, pixel)
 {
     unsigned char *addr;
     
+    if(x < 0 || y < 0)
+    	return 0;
+
     addr = &((unsigned char *)ximage->data) [ZINDEX16(x, y, ximage)];
     addr[1] = pixel >> 8;
     addr[0] = pixel;
@@ -1902,6 +1931,9 @@ PutPixel8(ximage, x, y, pixel)
     int y;
     unsigned long pixel;
 {
+    if(x < 0 || y < 0)
+    	return 0;
+
     ximage->data[ZINDEX8(x, y, ximage)] = pixel;
     return 1;
 }
@@ -1913,6 +1945,9 @@ PutPixel1MSB(ximage, x, y, pixel)
     int y;
     unsigned long pixel;
 {
+    if(x < 0 || y < 0)
+    	return 0;
+
     if (pixel & 1)
 	ximage->data[ZINDEX1(x, y, ximage)] |= 0x80 >> (x & 7);
     else
@@ -1927,6 +1962,9 @@ PutPixel1LSB(ximage, x, y, pixel)
     int y;
     unsigned long pixel;
 {
+    if(x < 0 || y < 0)
+    	return 0;
+
     if (pixel & 1)
 	ximage->data[ZINDEX1(x, y, ximage)] |= 1 << (x & 7);
     else
@@ -2061,8 +2099,8 @@ xpmParseDataAndCreate(display, data, image_return, shapeimage_return,
 	xpmGetCmt(data, &colors_cmt);
 
     /* malloc pixels index tables */
-    if (ncolors >= SIZE_MAX / sizeof(Pixel)) 
-	return XpmNoMemory;
+    if (ncolors >= UINT_MAX / sizeof(Pixel)) 
+	RETURN(XpmNoMemory);
 
     image_pixels = (Pixel *) XpmMalloc(sizeof(Pixel) * ncolors);
     if (!image_pixels)
@@ -2174,7 +2212,7 @@ xpmParseDataAndCreate(display, data, image_return, shapeimage_return,
      * free the hastable
      */
     if (ErrorStatus != XpmSuccess)
-	RETURN(ErrorStatus)
+	RETURN(ErrorStatus);
     else if (USE_HASHTABLE)
 	xpmHashTableFree(&hashtable);
 
@@ -2366,11 +2404,11 @@ if (cidx[f]) XpmFree(cidx[f]);}
 
 	    /* array of pointers malloced by need */
 	    unsigned short *cidx[256];
-	    int char1;
+	    unsigned int char1;
 
 	    bzero((char *)cidx, 256 * sizeof(unsigned short *)); /* init */
 	    for (a = 0; a < ncolors; a++) {
-		char1 = colorTable[a].string[0];
+		char1 = (unsigned char) colorTable[a].string[0];
 		if (cidx[char1] == NULL) { /* get new memory */
 		    cidx[char1] = (unsigned short *)
 			XpmCalloc(256, sizeof(unsigned short));
diff --git a/src/data.c b/src/data.c
index ccd98ed..cfd1007 100644
--- a/src/data.c
+++ b/src/data.c
@@ -33,6 +33,8 @@
 \*****************************************************************************/
 /* $XFree86: xc/extras/Xpm/lib/data.c,v 1.3 2001/10/28 03:32:10 tsi Exp $ */
 
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 #ifndef CXPMPROG
 #if 0
 /* Official version number */
@@ -262,7 +264,7 @@ xpmNextWord(data, buf, buflen)
 	}
 	Ungetc(data, c, file);
     }
-    return (n);
+    return (n); /* this returns bytes read + 1 */
 }
 
 /*
@@ -375,8 +377,9 @@ xpmGetCmt(data, cmt)
 {
     if (!data->type)
 	*cmt = NULL;
-    else if (data->CommentLength != 0 && data->CommentLength < SIZE_MAX - 1) {
-	*cmt = (char *) XpmMalloc(data->CommentLength + 1);
+    else if (data->CommentLength != 0 && data->CommentLength < UINT_MAX - 1) {
+	if( (*cmt = (char *) XpmMalloc(data->CommentLength + 1)) == NULL)
+		return XpmNoMemory;
 	strncpy(*cmt, data->Comment, data->CommentLength);
 	(*cmt)[data->CommentLength] = '\0';
 	data->CommentLength = 0;
@@ -400,7 +403,7 @@ int
 xpmParseHeader(data)
     xpmData *data;
 {
-    char buf[BUFSIZ];
+    char buf[BUFSIZ+1] = {0};
     int l, n = 0;
 
     if (data->type) {
diff --git a/src/hashtab.c b/src/hashtab.c
index f07cb6d..f5a71dd 100644
--- a/src/hashtab.c
+++ b/src/hashtab.c
@@ -138,13 +138,13 @@ HashTableGrows(table)
     unsigned int size = table->size;
     xpmHashAtom *t, *p;
     int i;
-    int oldSize = size;
+    unsigned int oldSize = size;
 
     t = atomTable;
     HASH_TABLE_GROWS
 	table->size = size;
     table->limit = size / 3;
-    if (size >= SIZE_MAX / sizeof(*atomTable)) 
+    if (size >= UINT_MAX / sizeof(*atomTable)) 
 	return (XpmNoMemory);
     atomTable = (xpmHashAtom *) XpmMalloc(size * sizeof(*atomTable));
     if (!atomTable)
@@ -206,7 +206,7 @@ xpmHashTableInit(table)
     table->size = INITIAL_HASH_SIZE;
     table->limit = table->size / 3;
     table->used = 0;
-    if (table->size >= SIZE_MAX / sizeof(*atomTable))
+    if (table->size >= UINT_MAX / sizeof(*atomTable))
 	return (XpmNoMemory);
     atomTable = (xpmHashAtom *) XpmMalloc(table->size * sizeof(*atomTable));
     if (!atomTable)
diff --git a/src/misc.c b/src/misc.c
index 7a9ecb5..ce80d54 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -44,7 +44,7 @@ xpmstrdup(s1)
     char *s1;
 {
     char *s2;
-    int l = strlen(s1) + 1;
+    size_t l = strlen(s1) + 1;
 
     if (s2 = (char *) XpmMalloc(l))
 	strcpy(s2, s1);
diff --git a/src/parse.c b/src/parse.c
index d46333b..73ed6b2 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -41,26 +41,28 @@
  * HeDu (hedu@cul-ipn.uni-kiel.de) 4/94
  */
 
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 #include "XpmI.h"
 #include <ctype.h>
 #include <string.h>
 
 #ifdef HAS_STRLCAT
-# define STRLCAT(dst, src, dstsize) { \
+# define STRLCAT(dst, src, dstsize) do { \
   	if (strlcat(dst, src, dstsize) >= (dstsize)) \
-	    return (XpmFileInvalid); }
-# define STRLCPY(dst, src, dstsize) { \
+	    return (XpmFileInvalid); } while(0)
+# define STRLCPY(dst, src, dstsize) do { \
   	if (strlcpy(dst, src, dstsize) >= (dstsize)) \
-	    return (XpmFileInvalid); }
+	    return (XpmFileInvalid); } while(0)
 #else
-# define STRLCAT(dst, src, dstsize) { \
+# define STRLCAT(dst, src, dstsize) do { \
 	if ((strlen(dst) + strlen(src)) < (dstsize)) \
  	    strcat(dst, src); \
-	else return (XpmFileInvalid); }
-# define STRLCPY(dst, src, dstsize) { \
+	else return (XpmFileInvalid); } while(0)
+# define STRLCPY(dst, src, dstsize) do { \
 	if (strlen(src) < (dstsize)) \
  	    strcpy(dst, src); \
-	else return (XpmFileInvalid); }
+	else return (XpmFileInvalid); } while(0)
 #endif
 
 LFUNC(ParsePixels, int, (xpmData *data, unsigned int width,
@@ -205,7 +207,7 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
     char **defaults;
     int ErrorStatus;
 
-    if (ncolors >= SIZE_MAX / sizeof(XpmColor))
+    if (ncolors >= UINT_MAX / sizeof(XpmColor))
 	return (XpmNoMemory);
     colorTable = (XpmColor *) XpmCalloc(ncolors, sizeof(XpmColor));
     if (!colorTable)
@@ -218,7 +220,7 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
 	    /*
 	     * read pixel value
 	     */
-	    if (cpp >= SIZE_MAX - 1) {
+	    if (cpp >= UINT_MAX - 1) {
 		xpmFreeColorTable(colorTable, ncolors);
 		return (XpmNoMemory);
 	    }
@@ -277,9 +279,9 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
 			return (XpmFileInvalid);
 		    }
 		    if (!lastwaskey)
-			STRLCAT(curbuf, " ", sizeof(curbuf)); /* append space */
+			STRLCAT(curbuf, " ", sizeof(curbuf));/* append space */
 		    buf[l] = '\0';
-		    STRLCAT(curbuf, buf, sizeof(curbuf));/* append buf */
+		    STRLCAT(curbuf, buf, sizeof(curbuf)); /* append buf */
 		    lastwaskey = 0;
 		}
 	    }
@@ -287,7 +289,7 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
 		xpmFreeColorTable(colorTable, ncolors);
 		return (XpmFileInvalid);
 	    }
-	    len = strlen(curbuf) + 1;
+	    len = strlen(curbuf) + 1; /* integer overflow just theoretically possible */
 	    s = defaults[curkey] = (char *) XpmMalloc(len);
 	    if (!s) {
 		xpmFreeColorTable(colorTable, ncolors);
@@ -306,7 +308,7 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
 	    /*
 	     * read pixel value
 	     */
-	    if (cpp >= SIZE_MAX - 1) {
+	    if (cpp >= UINT_MAX - 1) {
 		xpmFreeColorTable(colorTable, ncolors);
 		return (XpmNoMemory);
 	    }
@@ -351,7 +353,7 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
 	    memcpy(s, curbuf, len);
 	    color->c_color = s;
 	    *curbuf = '\0';		/* reset curbuf */
-	    if (a < ncolors - 1)
+	    if (a < ncolors - 1)	/* can we trust ncolors -> leave data's bounds */
 		xpmNextString(data);	/* get to the next string */
 	}
     }
@@ -370,11 +372,11 @@ ParsePixels(data, width, height, ncolors, cpp, colorTable, hashtable, pixels)
     xpmHashTable *hashtable;
     unsigned int **pixels;
 {
-    unsigned int *iptr, *iptr2;
+    unsigned int *iptr, *iptr2 = NULL; /* found by Egbert Eich */
     unsigned int a, x, y;
 
-    if ((height > 0 && width >= SIZE_MAX / height) ||
-	width * height >= SIZE_MAX / sizeof(unsigned int)) 
+    if ((height > 0 && width >= UINT_MAX / height) ||
+	width * height >= UINT_MAX / sizeof(unsigned int)) 
 	return XpmNoMemory;
 #ifndef FOR_MSW
     iptr2 = (unsigned int *) XpmMalloc(sizeof(unsigned int) * width * height);
@@ -399,8 +401,10 @@ ParsePixels(data, width, height, ncolors, cpp, colorTable, hashtable, pixels)
 	{
 	    unsigned short colidx[256];
 
-	    if (ncolors > 256)
+	    if (ncolors > 256) {
+		XpmFree(iptr2); /* found by Egbert Eich */
 		return (XpmFileInvalid);
+	    }
 
 	    bzero((char *)colidx, 256 * sizeof(short));
 	    for (a = 0; a < ncolors; a++)
@@ -427,16 +431,20 @@ ParsePixels(data, width, height, ncolors, cpp, colorTable, hashtable, pixels)
 	{
 
 /* free all allocated pointers at all exits */
-#define FREE_CIDX {int f; for (f = 0; f < 256; f++) \
-if (cidx[f]) XpmFree(cidx[f]);}
+#define FREE_CIDX \
+do \
+{ \
+	int f; for (f = 0; f < 256; f++) \
+	if (cidx[f]) XpmFree(cidx[f]); \
+} while(0)
 
 	    /* array of pointers malloced by need */
 	    unsigned short *cidx[256];
-	    int char1;
+	    unsigned int char1;
 
 	    bzero((char *)cidx, 256 * sizeof(unsigned short *)); /* init */
 	    for (a = 0; a < ncolors; a++) {
-		char1 = colorTable[a].string[0];
+		char1 = (unsigned char) colorTable[a].string[0];
 		if (cidx[char1] == NULL) { /* get new memory */
 		    cidx[char1] = (unsigned short *)
 			XpmCalloc(256, sizeof(unsigned short));
@@ -480,8 +488,10 @@ if (cidx[f]) XpmFree(cidx[f]);}
 	    char *s;
 	    char buf[BUFSIZ];
 
-	    if (cpp >= sizeof(buf))
+	    if (cpp >= sizeof(buf)) {
+		XpmFree(iptr2); /* found by Egbert Eich */
 		return (XpmFileInvalid);
+	    }
 
 	    buf[cpp] = '\0';
 	    if (USE_HASHTABLE) {
@@ -491,7 +501,7 @@ if (cidx[f]) XpmFree(cidx[f]);}
 		    xpmNextString(data);
 		    for (x = 0; x < width; x++, iptr++) {
 			for (a = 0, s = buf; a < cpp; a++, s++)
-			    *s = xpmGetC(data);
+			    *s = xpmGetC(data); /* int assigned to char, not a problem here */
 			slot = xpmHashSlot(hashtable, buf);
 			if (!*slot) {	/* no color matches */
 			    XpmFree(iptr2);
@@ -505,7 +515,7 @@ if (cidx[f]) XpmFree(cidx[f]);}
 		    xpmNextString(data);
 		    for (x = 0; x < width; x++, iptr++) {
 			for (a = 0, s = buf; a < cpp; a++, s++)
-			    *s = xpmGetC(data);
+			    *s = xpmGetC(data); /* int assigned to char, not a problem here */
 			for (a = 0; a < ncolors; a++)
 			    if (!strcmp(colorTable[a].string, buf))
 				break;
@@ -560,7 +570,7 @@ xpmParseExtensions(data, extensions, nextensions)
     while (!notstart && notend) {
 	/* there starts an extension */
 	ext = (XpmExtension *)
-	    XpmRealloc(exts, (num + 1) * sizeof(XpmExtension));
+	    XpmRealloc(exts, (num + 1) * sizeof(XpmExtension)); /* can the loop be forced to iterate often enough to make "(num + 1) * sizeof(XpmExtension)" wrapping? */
 	if (!ext) {
 	    XpmFree(string);
 	    XpmFreeExtensions(exts, num);
@@ -597,7 +607,7 @@ xpmParseExtensions(data, extensions, nextensions)
 	while ((notstart = strncmp("XPMEXT", string, 6))
 	       && (notend = strncmp("XPMENDEXT", string, 9))) {
 	    sp = (char **)
-		XpmRealloc(ext->lines, (nlines + 1) * sizeof(char *));
+		XpmRealloc(ext->lines, (nlines + 1) * sizeof(char *)); /* can we iterate enough for a wrapping? */
 	    if (!sp) {
 		XpmFree(string);
 		ext->nlines = nlines;
@@ -637,9 +647,9 @@ xpmParseExtensions(data, extensions, nextensions)
 /* function call in case of error */
 #undef RETURN
 #define RETURN(status) \
-{ \
+do { \
       goto error; \
-}
+} while(0)
 
 /*
  * This function parses an Xpm file or data and store the found informations
diff --git a/src/scan.c b/src/scan.c
index 230c7e6..69c987b 100644
--- a/src/scan.c
+++ b/src/scan.c
@@ -43,6 +43,8 @@
  * Lorens Younes (d93-hyo@nada.kth.se) 4/96
  */
 
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
 #include "XpmI.h"
 
 #define MAXPRINTABLE 92			/* number of printable ascii chars
@@ -172,10 +174,10 @@ storeMaskPixel(pixel, pmap, index_return)
 /* function call in case of error */
 #undef RETURN
 #define RETURN(status) \
-{ \
+do { \
       ErrorStatus = status; \
       goto error; \
-}
+} while(0)
 
 /*
  * This function scans the given image and stores the found informations in
@@ -233,15 +235,15 @@ XpmCreateXpmImageFromImage(display, image, shapeimage,
     else
 	cpp = 0;
 
-    if ((height > 0 && width >= SIZE_MAX / height) ||
-	width * height >= SIZE_MAX / sizeof(unsigned int))
+    if ((height > 0 && width >= UINT_MAX / height) ||
+	width * height >= UINT_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)) 
+    if (pmap.size >= UINT_MAX / sizeof(Pixel)) 
 	RETURN(XpmNoMemory);
 
     pmap.pixels = (Pixel *) XpmMalloc(sizeof(Pixel) * pmap.size);
@@ -308,7 +310,7 @@ XpmCreateXpmImageFromImage(display, image, shapeimage,
      * get rgb values and a string of char, and possibly a name for each
      * color
      */
-    if (pmap.ncolors >= SIZE_MAX / sizeof(XpmColor))
+    if (pmap.ncolors >= UINT_MAX / sizeof(XpmColor))
 	RETURN(XpmNoMemory);
     colorTable = (XpmColor *) XpmCalloc(pmap.ncolors, sizeof(XpmColor));
     if (!colorTable)
@@ -368,7 +370,7 @@ ScanTransparentColor(color, cpp, attributes)
 
     /* first get a character string */
     a = 0;
-    if (cpp >= SIZE_MAX - 1)
+    if (cpp >= UINT_MAX - 1)
 	return (XpmNoMemory);
     if (!(s = color->string = (char *) XpmMalloc(cpp + 1)))
 	return (XpmNoMemory);
@@ -461,7 +463,7 @@ ScanOtherColors(display, colors, ncolors, pixels, mask, cpp, attributes)
     }
 
     /* first get character strings and rgb values */
-    if (ncolors >= SIZE_MAX / sizeof(XColor) || cpp >= SIZE_MAX - 1)
+    if (ncolors >= UINT_MAX / sizeof(XColor) || cpp >= UINT_MAX - 1)
 	return (XpmNoMemory);
     xcolors = (XColor *) XpmMalloc(sizeof(XColor) * ncolors);
     if (!xcolors)
@@ -619,7 +621,7 @@ GetImagePixels(image, width, height, pmap)
     char *dst;
     unsigned int *iptr;
     char *data;
-    int x, y, i;
+    unsigned int x, y, i;
     int bits, depth, ibu, ibpp, offset;
     unsigned long lbt;
     Pixel pixel, px;
@@ -721,7 +723,7 @@ GetImagePixels32(image, width, height, pmap)
     unsigned char *addr;
     unsigned char *data;
     unsigned int *iptr;
-    int x, y;
+    unsigned int x, y;
     unsigned long lbt;
     Pixel pixel;
     int depth;
@@ -786,7 +788,7 @@ GetImagePixels16(image, width, height, pmap)
     unsigned char *addr;
     unsigned char *data;
     unsigned int *iptr;
-    int x, y;
+    unsigned int x, y;
     unsigned long lbt;
     Pixel pixel;
     int depth;
@@ -831,7 +833,7 @@ GetImagePixels8(image, width, height, pmap)
 {
     unsigned int *iptr;
     unsigned char *data;
-    int x, y;
+    unsigned int x, y;
     unsigned long lbt;
     Pixel pixel;
     int depth;
@@ -864,7 +866,7 @@ GetImagePixels1(image, width, height, pmap, storeFunc)
     storeFuncPtr storeFunc;
 {
     unsigned int *iptr;
-    int x, y;
+    unsigned int x, y;
     char *data;
     Pixel pixel;
     int xoff, yoff, offset, bpl;
@@ -900,11 +902,11 @@ GetImagePixels1(image, width, height, pmap, storeFunc)
 # else /* AMIGA */
 
 #define CLEAN_UP(status) \
-{\
+do {\
     if (pixels) XpmFree (pixels);\
     if (tmp_img) FreeXImage (tmp_img);\
     return (status);\
-}
+} while(0)
 
 static int
 AGetImagePixels (
@@ -925,7 +927,7 @@ AGetImagePixels (
     
     tmp_img = AllocXImage ((((width+15)>>4)<<4), 1, image->rp->BitMap->Depth);
     if (tmp_img == NULL)
-	CLEAN_UP (XpmNoMemory)
+	CLEAN_UP (XpmNoMemory);
     
     iptr = pmap->pixelindex;
     for (y = 0; y < height; ++y)
@@ -934,11 +936,11 @@ AGetImagePixels (
 	for (x = 0; x < width; ++x, ++iptr)
 	{
 	    if ((*storeFunc) (pixels[x], pmap, iptr))
-		CLEAN_UP (XpmNoMemory)
+		CLEAN_UP (XpmNoMemory);
 	}
     }
     
-    CLEAN_UP (XpmSuccess)
+    CLEAN_UP (XpmSuccess);
 }
 
 #undef CLEAN_UP