From: David Vrabel <david.vrabel@citrix.com>
To: Juergen Gross <jgross@suse.com>, <linux-kernel@vger.kernel.org>,
<xen-devel@lists.xensource.com>, <konrad.wilk@oracle.com>,
<david.vrabel@citrix.com>, <boris.ostrovsky@oracle.com>
Subject: Re: [Xen-devel] [PATCH V2 1/3] xen: mark pvscsi frontend request consumed only after last read
Date: Fri, 20 Feb 2015 13:52:52 +0000 [thread overview]
Message-ID: <54E73C34.6080901@citrix.com> (raw)
In-Reply-To: <1424156569-13642-2-git-send-email-jgross@suse.com>
On 17/02/15 07:02, Juergen Gross wrote:
> A request in the ring buffer mustn't be read after it has been marked
> as consumed. Otherwise it might already have been reused by the
> frontend without violating the ring protocol.
>
> To avoid inconsistencies in the backend only work on a private copy
> of the request. This will ensure a malicious guest not being able to
> bypass consistency checks of the backend by modifying an active
> request.
Applied to stable/for-linus-3.20 and tagged for stable, thanks.
David
WARNING: multiple messages have this Message-ID (diff)
From: David Vrabel <david.vrabel@citrix.com>
To: Juergen Gross <jgross@suse.com>,
linux-kernel@vger.kernel.org, xen-devel@lists.xensource.com,
konrad.wilk@oracle.com, david.vrabel@citrix.com,
boris.ostrovsky@oracle.com
Subject: Re: [Xen-devel] [PATCH V2 1/3] xen: mark pvscsi frontend request consumed only after last read
Date: Fri, 20 Feb 2015 13:52:52 +0000 [thread overview]
Message-ID: <54E73C34.6080901@citrix.com> (raw)
In-Reply-To: <1424156569-13642-2-git-send-email-jgross@suse.com>
On 17/02/15 07:02, Juergen Gross wrote:
> A request in the ring buffer mustn't be read after it has been marked
> as consumed. Otherwise it might already have been reused by the
> frontend without violating the ring protocol.
>
> To avoid inconsistencies in the backend only work on a private copy
> of the request. This will ensure a malicious guest not being able to
> bypass consistency checks of the backend by modifying an active
> request.
Applied to stable/for-linus-3.20 and tagged for stable, thanks.
David
next prev parent reply other threads:[~2015-02-20 13:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-17 7:02 [PATCH V2 0/3] xen: pvscsi: avoid race, support suspend/resume Juergen Gross
2015-02-17 7:02 ` [PATCH V2 1/3] xen: mark pvscsi frontend request consumed only after last read Juergen Gross
2015-02-20 13:52 ` David Vrabel [this message]
2015-02-20 13:52 ` [Xen-devel] " David Vrabel
2015-02-17 7:02 ` [PATCH V2 2/3] xen: scsiback: add LUN of restored domain Juergen Gross
2015-02-18 17:02 ` Boris Ostrovsky
2015-02-24 6:06 ` Juergen Gross
2015-02-24 15:12 ` Boris Ostrovsky
2015-03-16 14:49 ` [Xen-devel] " David Vrabel
2015-03-16 14:49 ` David Vrabel
2015-02-17 7:02 ` [PATCH V2 3/3] xen: support suspend/resume in pvscsi frontend Juergen Gross
2015-03-16 14:50 ` [Xen-devel] " David Vrabel
2015-03-16 14:50 ` David Vrabel
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