ntfsresize: fix segfault during fsck if $Bitmap was larger than expected

ChangeLog

@@ -141,6 +141,8 @@ xx/xx/2005 - 2.0.0-WIP
 	  the volume is tried to be opened read-write.  (Szaka)
 	- Move back from BitKeeper to CVS on SF.net and fix executable
 	  permissions that got lost during the move.  (Anton)
+	- ntfsresize: fix segfault during filesystem check if NTFS $Bitmap file
+	  size was larger than it should have been.  (Szaka)
 
 04/09/2004 - 1.9.4 - Urgent bug fixes.
 

ntfsprogs/ntfsresize.c

@@ -873,6 +873,11 @@ static void compare_bitmaps(ntfs_volume *vol, struct bitmap *a)
 			break;
 		}
 
+		if (a->size < pos + count)
+			err_exit("$Bitmap file size is larger than "
+				 "expected (%lld+ versus %lld)\n",
+				 pos + count, a->size);
+
 		for (i = 0; i < count; i++, pos++) {
 			s64 cl;  /* current cluster */