linux-kernel - Re: [patch 5/8] x86/fpu: Sanitize xstateregs

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Message-ID: <b9074b29-bc0e-6717-78c2-8b08fd008dbc@kernel.org>
Date:   Thu, 3 Jun 2021 10:24:33 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Dave Hansen <dave.hansen@...ux.intel.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Yu-cheng Yu <yu-cheng.yu@...el.com>
Subject: Re: [patch 5/8] x86/fpu: Sanitize xstateregs_set()

On 6/2/21 2:55 AM, Thomas Gleixner wrote:
> That's just wrong. The caller supplied invalid data or has a problem with
> unmapped memory, so there is absolutely no justification to wreckage the
> target.
> 

"Wreckage" is a delightful word, but it likes to be a noun.  One can
wreak the target, wreak havoc upon the target, annihilate the target, or
turn the target's state into system-destroying wreckage :)

--Andy