linux-kernel - Re: [PATCH 0/2] (Was: perf_event_mmap(vma) && !vma->vm

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Message-ID: <20131016205559.GF10651@twins.programming.kicks-ass.net>
Date:	Wed, 16 Oct 2013 22:55:59 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] (Was: perf_event_mmap(vma) && !vma->vm_mm)

On Wed, Oct 16, 2013 at 10:43:48PM +0200, Oleg Nesterov wrote:
> Yes, we can copy the garbage to the userspace. So what? This should not
> matter at all. Exactly because userspace should never used the data after
> the end of string, no?

Security people tell me to _never_ leak anything. I'm not near creative
enough to exploit such a thing; but I am amazed at the techniques I do
read about at times. So its really a better safe than sorry thing.


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