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

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Message-ID: <20191126202026.csrmjre6vn2nxq7c@linutronix.de>
Date:   Tue, 26 Nov 2019 21:20:26 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Barret Rhoden <brho@...gle.com>
Cc:     "Rik van Riel\"" <riel@...riel.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>
Subject: Re: AVX register corruption from signal delivery

On 2019-11-26 14:49:55 [-0500], Barret Rhoden wrote:
> Hi -
Hi,

> The bug requires the kernel to be built with GCC 9 to trigger.  In
> particular, arch/x86/kernel/fpu/signal.c needs to be built with GCC 9.

I've been pinged already, I will look into this. Please send me a
.config just to be sure. From browsing over the bug CONFIG_PREEMPTION
was required.

> Thanks,
> 
> Barret

Sebastian