improve handling of multi-part/broken zip archives

git-svn: trunk@1760

clamav-devel/ChangeLog

@@ -1,3 +1,8 @@
+Tue Nov 15 21:55:25 CET 2005 (tk)
+---------------------------------
+  * libclamav/zziplib: improve handling of multi-part/broken zip archives
+		       Test files provided by Tomasz Papszun
+
 Tue Nov 15 20:54:27 CET 2005 (tk)
 ---------------------------------
   * clamscan/treewalk.c: --exclude-dir was taking bad arguments when used

clamav-devel/libclamav/zziplib/zzip-zip.c

@@ -387,8 +387,13 @@ __zzip_parse_root_directory(int fd,
                 return ZZIP_DIR_SEEK;
 	    }
             if (io->read(fd, &dirent, sizeof(dirent)) < __sizeof(dirent)) {
-		free(hdr0);
-                return ZZIP_DIR_READ;
+		if(entries != u_entries) {
+		    entries = 0;
+		    break;
+		} else {
+		    free(hdr0);
+		    return ZZIP_DIR_READ;
+		}
 	    }
             d = &dirent;
         }