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Date: Tue, 9 Jun 2020 12:15:02 -0700
From: Kees Cook <>
To: Alexander Popov <>
Cc: Emese Revfy <>,
	Miguel Ojeda <>,
	Masahiro Yamada <>,
	Michal Marek <>,
	Andrew Morton <>,
	Masahiro Yamada <>,
	Thiago Jung Bauermann <>,
	Luis Chamberlain <>, Jessica Yu <>,
	Sven Schnelle <>,
	Iurii Zaikin <>,
	Catalin Marinas <>,
	Will Deacon <>,
	Vincenzo Frascino <>,
	Thomas Gleixner <>,
	Peter Collingbourne <>,
	Naohiro Aota <>,
	Alexander Monakov <>,
	Mathias Krause <>,
	PaX Team <>,
	Brad Spengler <>,
	Laura Abbott <>,
	Florian Weimer <>,,,,,,,
Subject: Re: [PATCH 0/5] Improvements of the stackleak gcc plugin

On Thu, Jun 04, 2020 at 04:49:52PM +0300, Alexander Popov wrote:
> In this patch series I collected various improvements of the stackleak
> gcc plugin.


> Alexander Popov (5):
>   gcc-plugins/stackleak: Exclude alloca() from the instrumentation logic
>   gcc-plugins/stackleak: Use asm instrumentation to avoid useless
>     register saving

These look like they might need tweaks (noted in their separate

>   gcc-plugins/stackleak: Add 'verbose' plugin parameter
>   gcc-plugins/stackleak: Don't instrument itself

If you wanted to reorder the series and move these first, I could take
these into my tree right away (they're logically separate from the other

>   gcc-plugins/stackleak: Don't instrument vgettimeofday.c in arm64 VDSO

This seems good -- though I'm curious about 32-bit ARM and the other
HAVE_GCC_PLUGINS architectures with vDSOs (which appears to be all of
them except um).

Kees Cook

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