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Message-ID: <20130605082302.GR8923@twins.programming.kicks-ass.net>
Date: Wed, 5 Jun 2013 10:23:02 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Andi Kleen <ak@...ux.jf.intel.com>
Cc: Marcus Meissner <meissner@...e.de>,
OSS Security List <oss-security@...ts.openwall.com>,
eranian@...gle.com, security@...nel.org
Subject: Re: CVE Request: More perf security fixes
On Tue, Jun 04, 2013 at 10:59:33AM -0700, Andi Kleen wrote:
> > 3. Information leak (??) via perf LBR filter
>
> Leak + crash actually.
>
> >
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6e15eb3ba6c0249c9e8c783517d131b47db995ca
> >
> > commit 6e15eb3ba6c0249c9e8c783517d131b47db995ca
> > Author: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> > Date: Fri May 3 14:11:24 2013 +0200
> >
> > perf/x86/intel/lbr: Fix LBR filter
> >
> > The LBR 'from' adddress is under full userspace control; ensure
> > we validate it before reading from it.
>
> This patch is known broken and causes additional crashes.
> There's no updated patch for that so far.
And yet there's no crash report in my inbox.. how kind you you andi.
And I know you don't agree with the patch, but since you're too lazy to
provide a better one I didn't think you minded _that_ much :-)
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