linux-kernel - Re: [kernel-hardening] [PATCH v3 1/3] x86/fpu: don't let userspace set bogus xcomp

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Date:   Thu, 21 Sep 2017 15:59:08 -0400
From:   Rik van Riel <riel@...hat.com>
To:     Eric Biggers <ebiggers3@...il.com>, x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Ingo Molnar <mingo@...nel.org>, Kevin Hao <haokexin@...il.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Wanpeng Li <wanpeng.li@...mail.com>,
        Yu-cheng Yu <yu-cheng.yu@...el.com>,
        Michael Halcrow <mhalcrow@...gle.com>,
        Eric Biggers <ebiggers@...gle.com>, stable@...r.kernel.org
Subject: Re: [kernel-hardening] [PATCH v3 1/3] x86/fpu: don't let userspace
 set bogus xcomp_bv

On Thu, 2017-09-21 at 11:52 -0700, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@...gle.com>
> 
> Fix the bug by checking that the user-supplied value of xcomp_bv is 0
> in
> the uncompacted case, and returning an error otherwise.
> 
Reviewed-by: Rik van Riel <riel@...hat.com>

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