Fix HDFFV-10591

Description:
    h52gif produced a segfault when a buffer overflow occurred because
    the data size was corrupted and became very large.  This commit added
    a check on the data size against the buffer size to prevent the segfault.
    It also added error reporting to h52gif to display an error message
    instead of silently exiting when the failure occurred.
Platforms tested:
    Linux/64 (jelly)
    SunOS 5.11 (emu)

1 files changed, 22 insertions, 11 deletions

diff --git a/hl/tools/gif2h5/hdf2gif.c b/hl/tools/gif2h5/hdf2gif.c
index e32facb..0e2a898 100644
--- a/hl/tools/gif2h5/hdf2gif.c
+++ b/hl/tools/gif2h5/hdf2gif.c
@@ -149,30 +149,41 @@ int main(int argc , char **argv)
             goto out;
         }
 
-        /* read image */
+        /* get image's information */
         if ( H5IMget_image_info( fid, image_name, &width, &height, &planes, interlace, &npals ) < 0 )
+        {
+            fprintf(stderr , "Unable to get information of the image. Aborting.\n");
             goto out;
+        }
 
-	if (width > IMAGE_WIDTH_MAX || height > IMAGE_HEIGHT_MAX){
-	    fprintf(stderr, "HDF5 image is too large. Limit is %d by %d.\n", IMAGE_WIDTH_MAX, IMAGE_HEIGHT_MAX);
-	    goto out;
-	}
+    	if (width > IMAGE_WIDTH_MAX || height > IMAGE_HEIGHT_MAX)
+        {
+	        fprintf(stderr, "HDF5 image is too large. Limit is %d by %d.\n", IMAGE_WIDTH_MAX, IMAGE_HEIGHT_MAX);
+	        goto out;
+	    }
 
-	/* tool can handle single plane images only. */
-	if (planes > 1){
-	    fprintf(stderr, "Cannot handle multiple planes image\n");
-	    goto out;
-	}
+	    /* tool can handle single plane images only. */
+	    if (planes > 1)
+        {
+	        fprintf(stderr, "Cannot handle multiple planes image\n");
+	        goto out;
+	    }
 
         Image = (GIFBYTE*) malloc( (size_t) width * (size_t) height );
 
         if ( H5IMread_image( fid, image_name, Image ) < 0 )
+        {
+            fprintf(stderr , "Unable to read the image. Aborting.\n");
             goto out;
+        }
 
         if (npals)
         {
             if ( H5IMget_palette_info( fid, image_name, 0, pal_dims ) < 0 )
+            {
+                fprintf(stderr , "Unable to get information of the palette. Aborting.\n");
                 goto out;
+            }
 
             pal = (GIFBYTE*) malloc( (size_t) pal_dims[0] * (size_t) pal_dims[1] );
 
@@ -246,7 +257,7 @@ int main(int argc , char **argv)
             if (j==i)
             {
                 /* wasn't found */
-	      pc2nc[i] = (GIFBYTE)nc;
+	            pc2nc[i] = (GIFBYTE)nc;
                 r1[nc] = Red[i];
                 g1[nc] = Green[i];
                 b1[nc] = Blue[i];