linux-kernel - Re: [PATCH v2] x86/dumpstack: Fix misleading instruction pointer error message

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Message-ID: <20201103175237.GD4111@zn.tnic>
Date:   Tue, 3 Nov 2020 18:52:37 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Oleg Nesterov <oleg@...hat.com>
Cc:     Mark Mossberg <mark.mossberg@...il.com>, tglx@...utronix.de,
        mingo@...hat.com, x86@...nel.org, linux-kernel@...r.kernel.org,
        hpa@...or.com, jannh@...gle.com, kyin@...hat.com
Subject: Re: [PATCH v2] x86/dumpstack: Fix misleading instruction pointer
 error message

On Tue, Nov 03, 2020 at 06:47:44PM +0100, Oleg Nesterov wrote:
> > I'm thinking this should not use the atomic variant if it can get called
> > in !atomic context too.
> 
> For what?

I'm thinking copy_code() should not use copy_from_user_nmi() if former
can be called in non-atomic context too.

-- 
Regards/Gruss,
    Boris.

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