linux-kernel - Re: [PATCH] x86/build: Disable CET instrumentation in the kernel for 32-bit too

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Message-ID: <20210208181259.hwmnoldx627jhvlm@treble>
Date:   Mon, 8 Feb 2021 12:12:59 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Borislav Petkov <bp@...e.de>
Cc:     AC <achirvasub@...il.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Marco Elver <elver@...gle.com>, Arnd Bergmann <arnd@...db.de>,
        linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com, nborisov@...e.com,
        seth.forshee@...onical.com, yamada.masahiro@...ionext.com
Subject: Re: [PATCH] x86/build: Disable CET instrumentation in the kernel for
 32-bit too

On Mon, Feb 08, 2021 at 05:25:43PM +0100, Borislav Petkov wrote:
> On Mon, Feb 08, 2021 at 10:19:33AM -0500, AC wrote:
> > That did fix it, thank you!
> 
> Thanks!
> 
> ---
> From: Borislav Petkov <bp@...e.de>
> Date: Mon, 8 Feb 2021 16:43:30 +0100
> Subject: [PATCH] x86/build: Disable CET instrumentation in the kernel for 32-bit too
> 
> Commit
> 
>   20bf2b378729 ("x86/build: Disable CET instrumentation in the kernel")
> 
> disabled CET instrumentation which gets added by default by the Ubuntu
> gcc9 and 10 by default, but did that only for 64-bit builds. It would
> still fail when building a 32-bit target. So disable CET for all x86
> builds.
> 
> Fixes: 20bf2b378729 ("x86/build: Disable CET instrumentation in the kernel")
> Reported-by: AC <achirvasub@...il.com>
> Signed-off-by: Borislav Petkov <bp@...e.de>
> Tested-by: AC <achirvasub@...il.com>
> Link: https://lkml.kernel.org/r/YCCIgMHkzh/xT4ex@arch-chirva.localdomain

Acked-by: Josh Poimboeuf <jpoimboe@...hat.com>

-- 
Josh