linux-kernel - Re: AVX register corruption from signal delivery

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Message-ID: <20191126221328.GH31379@zn.tnic>
Date:   Tue, 26 Nov 2019 23:13:53 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Barret Rhoden <brho@...gle.com>, austin@...gle.com
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Rik van Riel <riel@...riel.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>
Subject: Re: AVX register corruption from signal delivery

On Tue, Nov 26, 2019 at 04:23:40PM -0500, Barret Rhoden wrote:
> Thanks; config attached.  I've been able to recreate it in QEMU with at
> least 2 cores.

Yap, I can too, in my VM.

Btw, would you guys like to submit that reproducer test program

https://bugzilla.kernel.org/attachment.cgi?id=286073

into the kernel selftests pile here:

tools/testing/selftests/x86/

?

It needs proper cleanup to fit kernel coding style but it could be a
good start for collecting interesting FPU test cases...

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette