From: Vincent Hanquez <vincent.hanquez@eu.citrix.com>
To: Olaf Hering <olaf@aepfle.de>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: [PATCH] xenstored: allow guests to reintroduce themselves
Date: Tue, 9 Aug 2011 11:08:13 +0100 [thread overview]
Message-ID: <4E41070D.8020009@eu.citrix.com> (raw)
In-Reply-To: <edb96c34f4a638e8ba97.1312202316@probook.site>
On 08/01/2011 01:38 PM, Olaf Hering wrote:
> # HG changeset patch
> # User Olaf Hering<olaf@aepfle.de>
> # Date 1312202176 -7200
> # Node ID edb96c34f4a638e8ba97933b6bd76ff72836353e
> # Parent 0f36c2eec2e1576b4db6538b5f22d625587c1a15
> xenstored: allow guests to reintroduce themselves
>
> During kexec all old watches have to be removed, otherwise the new
> kernel will receive unexpected events. Allow a guest to introduce itself
> and cleanup all of its watches.
What about security wise ?
Guest userspace suddenly becomes able to do this operation (and DoS themself)
where they used to be limited to normal read/write/.. operations.
Also you're changing the C xenstored behavior without changing
the OCaml one.
--
Vincent
next prev parent reply other threads:[~2011-08-09 10:08 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-01 12:38 [PATCH] xenstored: allow guests to reintroduce themselves Olaf Hering
2011-08-09 8:59 ` Ian Campbell
2011-08-09 9:17 ` Olaf Hering
2011-08-09 9:25 ` Ian Campbell
2011-08-09 9:34 ` Olaf Hering
2011-08-09 10:08 ` Vincent Hanquez [this message]
2011-08-09 10:14 ` Keir Fraser
2011-08-09 10:50 ` Vincent Hanquez
2011-08-09 11:00 ` Keir Fraser
2011-08-09 11:18 ` Vincent Hanquez
2011-08-09 11:31 ` Keir Fraser
2011-08-09 12:33 ` Vincent Hanquez
2011-08-09 11:07 ` Vincent Hanquez
2011-08-09 10:49 ` Olaf Hering
2011-08-09 16:34 ` Ian Jackson
2011-08-09 16:38 ` Ian Jackson
2011-08-09 16:49 ` Ian Jackson
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