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xen-devel
Re: [Xen-devel][PATCH]ioemu:fix up error when using qemu-img-xen to crea
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To: |
"Daniel P. Berrange" <berrange@xxxxxxxxxx> |
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Subject: |
Re: [Xen-devel][PATCH]ioemu:fix up error when using qemu-img-xen to create img |
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From: |
Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> |
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Date: |
Tue, 5 May 2009 18:19:52 +0100 |
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Cc: |
"Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Li, Xin" <xin.li@xxxxxxxxx>, "Zhang, Yang" <yang.zhang@xxxxxxxxx> |
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Tue, 05 May 2009 10:20:20 -0700 |
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Daniel P. Berrange writes ("Re: [Xen-devel][PATCH]ioemu:fix up error when using
qemu-img-xen to create img"):
> On Tue, May 05, 2009 at 03:17:34PM +0100, Ian Jackson wrote:
> > Upstream qemu have fixed this problem in a half-hearted way and
> > evidently their qemu-img is still vulnerable. We have changed the
> > format-determination code in block.c so that any attempt to autodetect
> > a format never returns `raw'; that means that any vulnerable code
> > anywhere is instantly fixed although it may break some existing usages
> > in cases where we haven't properly plumbed through a specification of
> > the image format.
>
> Wasn't the upstream change to add a '-F baseimage_format' enough to
> allow the flaw to be avoided when creating new images ? Or are you
> attempting to prevent the issue, even when -F is not used ?
Yes, upstream have introduced -F but only in the main branch, and not
the stable branch we're basing Xen 3.4 on. So yes, this problem will
go away when I pull after the Xen 3.4 release.
Ian.
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