linux-kernel - Re: [PATCH v2 0/5] Improvements of the stackleak gcc plugin

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Date:   Wed, 24 Jun 2020 14:54:49 +0100
From:   Will Deacon <will@...nel.org>
To:     Iurii Zaikin <yzaikin@...gle.com>, PaX Team <pageexec@...email.hu>,
        Mathias Krause <minipli@...glemail.com>, x86@...nel.org,
        Sven Schnelle <svens@...ckframe.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Florian Weimer <fweimer@...hat.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        linux-kernel@...r.kernel.org,
        Michal Marek <michal.lkml@...kovi.net>,
        Catalin Marinas <catalin.marinas@....com>,
        Emese Revfy <re.emese@...il.com>,
        kernel-hardening@...ts.openwall.com,
        Laura Abbott <labbott@...hat.com>,
        Brad Spengler <spender@...ecurity.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jessica Yu <jeyu@...nel.org>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Kees Cook <keescook@...omium.org>,
        linux-kbuild@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Peter Collingbourne <pcc@...gle.com>,
        Naohiro Aota <naohiro.aota@....com>,
        Alexander Monakov <amonakov@...ras.ru>,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Alexander Popov <alex.popov@...ux.com>, gcc@....gnu.org,
        Jann Horn <jannh@...gle.com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     kernel-team@...roid.com, Will Deacon <will@...nel.org>,
        notify@...nel.org
Subject: Re: [PATCH v2 0/5] Improvements of the stackleak gcc plugin

On Wed, 24 Jun 2020 15:33:25 +0300, Alexander Popov wrote:
> This is the v2 of the patch series with various improvements of the
> stackleak gcc plugin.
> 
> The first three patches disable unneeded gcc plugin instrumentation for
> some files.
> 
> The fourth patch is the main improvement. It eliminates an unwanted
> side-effect of kernel code instrumentation performed by stackleak gcc
> plugin. This patch is a deep reengineering of the idea described on
> grsecurity blog:
>   https://grsecurity.net/resolving_an_unfortunate_stackleak_interaction
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64: vdso: Don't use gcc plugins for building vgettimeofday.c
      https://git.kernel.org/arm64/c/e56404e8e475

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev