linux-kernel - RE: [PATCH] execve: argument list space enlargement

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Date: Fri, 5 Jan 2024 12:02:08 +0000
From: David Laight <David.Laight@...LAB.COM>
To: "'alexs@...nel.org'" <alexs@...nel.org>, Eric Biederman
	<ebiederm@...ssion.com>, Kees Cook <keescook@...omium.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
CC: Alex Shi <alexsshi@...cent.com>, "curlinhuang@...cent.com"
	<curlinhuang@...cent.com>
Subject: RE: [PATCH] execve: argument list space enlargement

From: alexs@...nel.org
> Sent: 03 January 2024 13:07
> 
> From: Alex Shi <alexsshi@...cent.com>
> 
> Wechat using too long gcc parameters, then get a strace complain:
>   execve(...) = -1 E2BIG (Argument list too long)
> Have to increase the parameter space for this, stack has enough
> space for this enlargement.

They should fix their build so that it doesn't explode.
It'll probably speed up the compiles as well since the
very long argv[] almost certainly comes from a lot of -I dir
options and they slow down the compile.

if they are -Dvar[=val] then '-include file' can be used instead.

	David

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