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From: "Jan Beulich" <jbeulich@suse.com>
To: Ian.Campbell@citrix.com, xen-devel@lists.xen.org
Cc: Ian.Jackson@eu.citrix.com, wei.liu2@citrix.com
Subject: Re: [PATCH] libxc: x86: ensure that the initial mapping fits into the guest's memory
Date: Mon, 07 Jan 2013 07:00:22 +0000	[thread overview]
Message-ID: <50EA72860200007800092647@nat28.tlf.novell.com> (raw)
In-Reply-To: <1357318360.14291.93.camel@zakaz.uk.xensource.com>

>>> Ian Campbell <Ian.Campbell@citrix.com> 01/04/13 5:53 PM >>>
>libxc: x86: ensure that the initial mapping fits into the guest's memory
>
>In particular we need to check that adding 512KB of slack and
>rounding up to a 4MB boundary do not overflow the guest's memory
>allocation. Otherwise we run off the end of the p2m when building the
>guest's initial page tables and populate them with garbage.

Sadly our testing found this to cause SLE11 SP2 PV guests to not start
anymore (in its 4.1.x backported incarnation). I didn't get around yet to
check whether in the (apparently trivial) backport I overlooked something;
will do as soon as I get to the office.

Jan

  reply	other threads:[~2013-01-07  7:00 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <E1Tr9he-0007fM-NC@xenbits.xen.org>
2013-01-04 16:52 ` [PATCH] libxc: x86: ensure that the initial mapping fits into the guest's memory Ian Campbell
2013-01-07  7:00   ` Jan Beulich [this message]
2013-01-07 10:35   ` Jan Beulich
2013-01-07 10:37     ` Ian Campbell
2013-01-07 11:05       ` Jan Beulich
2013-01-07 11:39         ` Ian Campbell
2013-01-07 13:37           ` [PATCH V2] " Ian Campbell
2013-01-07 10:21 ` Security support for debug=y builds (Was Re: Xen Security Advisory 37 (CVE-2013-0154) - Hypervisor crash due to incorrect ASSERT (debug build only)) Ian Campbell
2013-01-07 11:08   ` Keir Fraser
2013-01-07 11:21     ` Andrew Cooper
2013-01-07 11:36       ` Ian Campbell
2013-01-07 12:58         ` James Bulpin
2013-01-07 16:22           ` Keir Fraser
2013-02-08 11:25         ` Ian Campbell
2013-02-08 11:29           ` Ian Campbell
2013-02-08 11:29         ` Ian Campbell
2013-02-08 11:40           ` Jan Beulich
2013-02-08 11:47             ` Ian Campbell
2013-01-07 11:09   ` Jan Beulich

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