Re: CVE Request: More perf security fixes

[Andi Kleen <ak () linux jf intel com>]

> 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 () chello 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.

-Andi