linux-kernel - Re: [for-stable-4.19 PATCH v2 0/2] Backport patches to fix KASAN+LKDTM with recent clang on ARM64

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Message-ID: <YFXVBXuXRkug2Esi@kroah.com>
Date:   Sat, 20 Mar 2021 11:57:09 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Nicolas Boichat <drinkcat@...omium.org>
Cc:     stable@...r.kernel.org, groeck@...omium.org,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        Arnd Bergmann <arnd@...db.de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christopher Li <sparse@...isli.org>,
        Daniel Axtens <dja@...ens.net>,
        Kees Cook <keescook@...omium.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Michal Marek <michal.lkml@...kovi.net>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Paul Mackerras <paulus@...ba.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        clang-built-linux@...glegroups.com, linux-arch@...r.kernel.org,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-sparse@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [for-stable-4.19 PATCH v2 0/2] Backport patches to fix
 KASAN+LKDTM with recent clang on ARM64

On Sat, Mar 20, 2021 at 12:16:24PM +0800, Nicolas Boichat wrote:
> Backport 2 patches that are required to make KASAN+LKDTM work
> with recent clang (patch 2/2 has a complete description).
> Tested on our chromeos-4.19 branch.
> Also compile tested on x86-64 and arm64 with gcc this time
> around.
> 
> Patch 1/2 adds a guard around noinstr that matches upstream,
> to prevent a build issue, and has some minor context conflicts.
> Patch 2/2 is a clean backport.
> 
> These patches have been merged to 5.4 stable already. We might
> need to backport to older stable branches, but this is what I
> could test for now.

Ok, trying this again, let's see what breaks :)

thanks,

greg k-h