From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Keir Fraser <keir@xen.org>,
Ian Campbell <Ian.Campbell@citrix.com>, Tim Deegan <tim@xen.org>,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
Xen-devel <xen-devel@lists.xen.org>,
Jan Beulich <JBeulich@suse.com>
Subject: Re: [PATCH 0/3] per_cpu() fixes
Date: Thu, 3 Oct 2013 18:55:25 +0100 [thread overview]
Message-ID: <524DAF8D.7050003@citrix.com> (raw)
In-Reply-To: <1380188966-26665-1-git-send-email-andrew.cooper3@citrix.com>
On 26/09/13 10:49, Andrew Cooper wrote:
> This patch series is two independent but related changes to the use of
> per_cpu() with offline pcpus.
>
> The first patch is a fix for use of get_cpu_idle_time() whereby toolstack
> hypercalls could cause an effective NULL structure dereference.
>
> The second patch is a forward looking fix to try and prevent similar issues in
> the future. It causes uses of per_cpu() against an offline pcpu to cause a
> #GF rather than to try and dereference a very low address.
>
> The third patch is debugging code to demonstrate the effects of patch 2.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
> CC: Keir Fraser <keir@xen.org>
> CC: Jan Beulich <JBeulich@suse.com>
> CC: Tim Deegan <tim@xen.org>
> CC: Ian Campbell <Ian.Campbell@citrix.com>
> CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
>
Ping? Any thoughts at all?
~Andrew
next prev parent reply other threads:[~2013-10-03 17:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-26 9:49 [PATCH 0/3] per_cpu() fixes Andrew Cooper
2013-09-26 9:49 ` [PATCH 1/3] x86/idle: Fix get_cpu_idle_time()'s interaction with offline pcpus Andrew Cooper
2013-09-26 9:49 ` [PATCH 2/3] x86/percpu: Force INVALID_PERCPU_AREA into the non-canonical address region Andrew Cooper
2013-09-26 10:04 ` Andrew Cooper
2013-09-26 9:49 ` [PATCH 3/3] DO NOT APPLY - debugging code for gpf when accessing invalid per_cpu() data Andrew Cooper
2013-10-03 17:55 ` Andrew Cooper [this message]
2013-10-03 19:52 ` [PATCH 0/3] per_cpu() fixes Keir Fraser
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