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+++ This bug was initially created as a clone of Bug #1129892 +++

Via Bug 1004420, we introduced a few "qcow2 corruption prevention" patches.

But there are some recent upstream follow-ups that apparently should be included as well. This BZ is to track it and analyse which of these fixes should be backported.

Right now I see the following two series:



Date: Thu,  7 Aug 2014 22:47:52 +0200
From: Max Reitz <mreitz>
Subject: [Qemu-devel] [PATCH 0/3] qcow2: Prevent corruption-related crashes

Max Reitz (3):
  qcow2: Catch !*host_offset for data allocation
  iotests: Add test for image header overlap
  block: Catch !bs->drv in bdrv_check()

AND

Date: Wed, 13 Aug 2014 23:01:42 +0200
From: Max Reitz <mreitz>
Subject: [Qemu-devel] [PATCH 0/8] qcow2: Fix image repairing

Max Reitz (8):
  qcow2: Factor out refcount accounting for check
  qcow2: Factor out refcount comparison for check
  qcow2: Fix refcount blocks beyond image end
  qcow2: Do not perform potentially damaging repairs
  qcow2: Rebuild refcount structure during check
  qcow2: Clean up after refcount rebuild
  iotests: Fix test outputs
  iotests: Add test for potentially damaging repairs

Fix included in qemu-kvm-1.5.3-94.el7

According to comment4, set this issue as verified.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2213.html