linux-kernel - Re: [PATCH v6 48/76] x86/entry/64: Add entry code for #VC handler

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Date:   Tue, 1 Sep 2020 15:29:51 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     x86@...nel.org, Joerg Roedel <jroedel@...e.de>, hpa@...or.com,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Jiri Slaby <jslaby@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Juergen Gross <jgross@...e.com>,
        Kees Cook <keescook@...omium.org>,
        David Rientjes <rientjes@...gle.com>,
        Cfir Cohen <cfir@...gle.com>,
        Erdem Aktas <erdemaktas@...gle.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mike Stunes <mstunes@...are.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Martin Radev <martin.b.radev@...il.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v6 48/76] x86/entry/64: Add entry code for #VC handler

On Mon, Aug 31, 2020 at 01:30:02PM +0200, Borislav Petkov wrote:
> AFAICT, that STACK_TYPE_UNKNOWN gets set only by the plain
> get_stack_info() function - not by the _noinstr() variant so you'd need
> to check the return value of latter...

You are right, it needs to check the return value of
get_stack_info_noinstr() instead of STACK_TYPE_UNKNOWN. Fixed that now.


Regards,

	Joerg