From: Eric Blake <eblake@redhat.com>
To: Max Reitz <mreitz@redhat.com>, qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 1/4] qcow2: Move reading nb_snapshots in qcow2_open
Date: Tue, 19 Nov 2013 13:46:32 -0700 [thread overview]
Message-ID: <528BCE28.7070206@redhat.com> (raw)
In-Reply-To: <1384697924-16918-2-git-send-email-mreitz@redhat.com>
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On 11/17/2013 07:18 AM, Max Reitz wrote:
> Any goto fail between having read nb_snapshots (returning a non-zero
> value) and allocating s->snapshots (through qcow2_read_snapshots())
> results in qcow2_free_snapshots() being called, dereferencing
> s->snapshots which is still NULL.
>
> Fix this by moving the reading of nb_snapshots right before the call to
> qcow2_read_snapshots().
>
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
> block/qcow2.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
Are you intending this series as a bug fix for 1.7?
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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next prev parent reply other threads:[~2013-11-19 20:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-17 14:18 [Qemu-devel] [PATCH 0/4] qcow2: Fixes for invalid images Max Reitz
2013-11-17 14:18 ` [Qemu-devel] [PATCH 1/4] qcow2: Move reading nb_snapshots in qcow2_open Max Reitz
2013-11-19 20:46 ` Eric Blake [this message]
2013-11-17 14:18 ` [Qemu-devel] [PATCH 2/4] qcow2-refcount: Sanitize refcount table size Max Reitz
2013-11-19 20:47 ` Eric Blake
2013-11-17 14:18 ` [Qemu-devel] [PATCH 3/4] qcow2: " Max Reitz
2013-11-19 20:48 ` Eric Blake
2013-11-17 14:18 ` [Qemu-devel] [PATCH 4/4] qcow2: Check validity of backing file name length Max Reitz
2013-11-19 20:49 ` Eric Blake
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