Re: [PATCH v2 3/5] arm64: vdso: Don't use gcc plugins for building vgettimeofday.c

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Subject: Re: [PATCH v2 3/5] arm64: vdso: Don't use gcc plugins for building vgettimeofday.c
From: Kees Cook <keescook@xxxxxxxxxxxx>
Date: Wed, 24 Jun 2020 07:46:17 -0700
Cc: Jann Horn <jannh@xxxxxxxxxx>, Emese Revfy <re.emese@xxxxxxxxx>, Miguel Ojeda <miguel.ojeda.sandonis@xxxxxxxxx>, Masahiro Yamada <masahiroy@xxxxxxxxxx>, Michal Marek <michal.lkml@xxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>, Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxx>, Luis Chamberlain <mcgrof@xxxxxxxxxx>, Jessica Yu <jeyu@xxxxxxxxxx>, Sven Schnelle <svens@xxxxxxxxxxxxxx>, Iurii Zaikin <yzaikin@xxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Vincenzo Frascino <vincenzo.frascino@xxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Peter Collingbourne <pcc@xxxxxxxxxx>, Naohiro Aota <naohiro.aota@xxxxxxx>, Alexander Monakov <amonakov@xxxxxxxxx>, Mathias Krause <minipli@xxxxxxxxxxxxxx>, PaX Team <pageexec@xxxxxxxxxxx>, Brad Spengler <spender@xxxxxxxxxxxxxx>, Laura Abbott <labbott@xxxxxxxxxx>, Florian Weimer <fweimer@xxxxxxxxxx>, kernel-hardening@xxxxxxxxxxxxxxxxxx, linux-kbuild@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, gcc@xxxxxxxxxxx, notify@xxxxxxxxxx
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In-reply-to: <20200624123330.83226-4-alex.popov@linux.com>
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On Wed, Jun 24, 2020 at 03:33:28PM +0300, Alexander Popov wrote:
> Don't use gcc plugins for building arch/arm64/kernel/vdso/vgettimeofday.c
> to avoid unneeded instrumentation.
> 
> Signed-off-by: Alexander Popov <alex.popov@xxxxxxxxx>

It looks like Will has taken this already, but:

Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>

-- 
Kees Cook

References:
- [PATCH v2 0/5] Improvements of the stackleak gcc plugin
  - From: Alexander Popov
- [PATCH v2 3/5] arm64: vdso: Don't use gcc plugins for building vgettimeofday.c
  - From: Alexander Popov

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