$NetBSD: patch-ab,v 1.6 2004/12/10 09:30:42 salo Exp $

--- Imlib/load.c.orig	2004-09-21 02:23:20.000000000 +0200
+++ Imlib/load.c	2004-12-10 09:58:18.000000000 +0100
@@ -4,6 +4,8 @@
 #include "Imlib_private.h"
 #include <setjmp.h>
 
+#define G_MAXINT ((int) 0x7fffffff)
+
 /*      Split the ID - damages input    */
 
 static char        *
@@ -41,13 +43,17 @@
 
 /*
  *     Make sure we don't wrap on our memory allocations
+ *     we check G_MAXINT/4 because rend.c malloc's w * h * bpp
+ *     + 3 is safety margin
  */
 
 void * _imlib_malloc_image(unsigned int w, unsigned int h)
 {
-       if( w > 32767 || h > 32767)
+       if (w <= 0 || w > 32767 ||
+           h <= 0 || h > 32767 ||
+           h >= (G_MAXINT/4 - 1) / w)
                return NULL;
-       return malloc(w * h * 3);
+       return malloc(w * h * 3 + 3);
 }
 
 #ifdef HAVE_LIBJPEG
@@ -254,7 +260,8 @@
   png_read_image(png_ptr, lines);
   png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
   ptr = data;
-  if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+  if (color_type == PNG_COLOR_TYPE_GRAY
+      || color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
     {
       for (y = 0; y < *h; y++)
 	{
@@ -279,6 +286,7 @@
 	    }
 	}
     }
+#if 0
   else if (color_type == PNG_COLOR_TYPE_GRAY)
     {
       for (y = 0; y < *h; y++)
@@ -294,6 +302,7 @@
 	    }
 	}
     }
+#endif
   else
     {
       for (y = 0; y < *h; y++)
@@ -360,7 +369,9 @@
   npix = ww * hh;
   *w = (int)ww;
   *h = (int)hh;
-  if(ww > 32767 || hh > 32767)
+  if (ww <= 0 || ww > 32767 ||
+      hh <= 0 || hh > 32767 ||
+      hh >= (G_MAXINT/sizeof(uint32)) / ww)
     {
        TIFFClose(tif);
        return NULL;
@@ -463,7 +474,7 @@
 	    }
 	  *w = gif->Image.Width;
 	  *h = gif->Image.Height;
-	  if (*h > 32767 || *w > 32767)
+	  if (*h <= 0 || *h > 32767 || *w <= 0 || *w > 32767)
 	    {
 	       return NULL;
 	    }
@@ -1000,7 +1011,12 @@
   comment = 0;
   quote = 0;
   context = 0;
+  memset(lookup, 0, sizeof(lookup));
+
   line = malloc(lsz);
+  if (!line)
+    return NULL;
+
   while (!done)
     {
       pc = c;
@@ -1029,25 +1045,25 @@
 		{
 		  /* Header */
 		  sscanf(line, "%i %i %i %i", w, h, &ncolors, &cpp);
-                  if (ncolors > 32766)
+                  if (ncolors <= 0 || ncolors > 32766)
 		    {
 		      fprintf(stderr, "IMLIB ERROR: XPM files wth colors > 32766 not supported\n");
 		      free(line);
 		      return NULL;
 		    }
-		  if (cpp > 5)
+		  if (cpp <= 0 || cpp > 5)
 		    {
 		      fprintf(stderr, "IMLIB ERROR: XPM files with characters per pixel > 5 not supported\n");
 		      free(line);
 		      return NULL;
 		    }
-		  if (*w > 32767)
+		  if (*w <= 0 || *w > 32767)
 		    {
 		      fprintf(stderr, "IMLIB ERROR: Image width > 32767 pixels for file\n");
 		      free(line);
 		      return NULL;
 		    }
-		  if (*h > 32767)
+		  if (*h <= 0 || *h > 32767)
 		    {
 		      fprintf(stderr, "IMLIB ERROR: Image height > 32767 pixels for file\n");
 		      free(line);
@@ -1080,11 +1096,13 @@
 		    {
 		      int                 slen;
 		      int                 hascolor, iscolor;
+		      int                 space;
 
 		      iscolor = 0;
 		      hascolor = 0;
 		      tok[0] = 0;
 		      col[0] = 0;
+		      space = sizeof(col) - 1;
 		      s[0] = 0;
 		      len = strlen(line);
 		      strncpy(cmap[j].str, line, cpp);
@@ -1107,10 +1125,10 @@
 				{
 				  if (k >= len)
 				    {
-				      if (col[0])
-					strcat(col, " ");
-                                      if (strlen(col) + strlen(s) < sizeof(col))
-					strcat(col, s);
+				      if (col[0] && space > 0)
+					strcat(col, " "), space -= 1;
+                                      if (slen <= space)
+					strcat(col, s), space -= slen;
 				    }
 				  if (col[0])
 				    {
@@ -1140,14 +1158,17 @@
 					    }
 					}
 				    }
+				  if (slen < sizeof(tok));
 				  strcpy(tok, s);
 				  col[0] = 0;
+				  space = sizeof(col) - 1;
 				}
 			      else
 				{
-				  if (col[0])
-				    strcat(col, " ");
-				  strcat(col, s);
+				  if (col[0] && space > 0)
+				    strcat(col, " "), space -=1;
+				  if (slen <= space)
+				    strcat(col, s), space -= slen;
 				}
 			    }
 			}
@@ -1376,12 +1397,12 @@
 	  sscanf(s, "%i %i", w, h);
 	  a = *w;
 	  b = *h;
-	  if (a > 32767)
+	  if (a <= 0 || a > 32767)
 	    {
 	      fprintf(stderr, "IMLIB ERROR: Image width > 32767 pixels for file\n");
 	      return NULL;
 	    }
-	  if (b > 32767)
+	  if (b <= 0 || b > 32767)
 	    {
 	      fprintf(stderr, "IMLIB ERROR: Image height > 32767 pixels for file\n");
 	      return NULL;