From 8884dd1bbc5ce42cd657ffcbef3a477443468974 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Tue, 25 Nov 2014 18:12:41 +0100 Subject: [PATCH] qcow2.py: Add required padding for header extensions The qcow2 specification requires that the header extension data be padded to round up the extension size to the next multiple of 8 bytes. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Message-id: 1416935562-7760-3-git-send-email-kwolf@redhat.com Signed-off-by: Stefan Hajnoczi Signed-off-by: Kevin Wolf --- tests/qemu-iotests/qcow2.py | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tests/qemu-iotests/qcow2.py b/tests/qemu-iotests/qcow2.py index 2058596..9cc4cf7 100755 --- a/tests/qemu-iotests/qcow2.py +++ b/tests/qemu-iotests/qcow2.py @@ -7,6 +7,10 @@ import string class QcowHeaderExtension: def __init__(self, magic, length, data): + if length % 8 != 0: + padding = 8 - (length % 8) + data += "\0" * padding + self.magic = magic self.length = length self.data = data -- 2.7.4