linux-kernel - Re: 5.2-rc0.8: emacs segfaults?! x220, with 32-bit userland

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Message-ID: <20190520231342.GA20835@amd>
Date:   Tue, 21 May 2019 01:13:42 +0200
From:   Pavel Machek <pavel@....cz>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     kernel list <linux-kernel@...r.kernel.org>, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, hpa@...or.com, x86@...nel.org
Subject: Re: 5.2-rc0.8: emacs segfaults?! x220, with 32-bit userland

Hi!

> > emacs segfaults... when I attempt to exit it. And that did not use to
> > be the case. Nothing suspect in the dmesg. Rest of the machine seems
> > to work ok.
> …
> > Ideas welcome...
> 
> I assume that this happens with -rc1, too. Could you please check if
> emacs still segfaults with commit
> 
>   d9c9ce34ed5c8 ("x86/fpu: Fault-in user stack if copy_fpstate_to_sigframe() fails")
> 
> and commit
> 
>   89833fab15d60 ("x86/fpu: Fix __user annotations")
> 
> ?

I don't have reproducible test case :-(. I had two or three failures
so far.

Best regards,

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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