Squashfs: add missing check in zlib_wrapper

On file system corruption zlib can return Z_STREAM_OK with input buffers remaining, which will not be released. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
mariux64 · Jan 13, 2011 · e7ee11f · e7ee11f
1 parent 170cf02
commit e7ee11f
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/fs/squashfs/zlib_wrapper.c b/fs/squashfs/zlib_wrapper.c
@@ -127,6 +127,11 @@ static int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer,
 		goto release_mutex;
 	}
 
+	if (k < b) {
+		ERROR("zlib_uncompress error, data remaining\n");
+		goto release_mutex;
+	}
+
 	length = stream->total_out;
 	mutex_unlock(&msblk->read_data_mutex);
 	return length;