linux-kernel - Re: [PATCH] init: fix bug where environment vars can't be passed via boot args

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Message-Id: <20120419151746.8c765ea7.akpm@linux-foundation.org>
Date:	Thu, 19 Apr 2012 15:17:46 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Chris Metcalf <cmetcalf@...era.com>
Cc:	Pawel Moll <pawel.moll@....com>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Stanislaw Gruszka <sgruszka@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] init: fix bug where environment vars can't be passed
 via boot args

On Fri, 6 Apr 2012 12:53:50 -0400
Chris Metcalf <cmetcalf@...era.com> wrote:

> Commit 026cee0086f had the side-effect of dropping the '=' from
> the unknown boot arguments that are passed to init as environment
> variables.  This is because parse_args() puts a NUL in the string
> where the '=' was when it passes the "param" and "val" pointers
> to the parsing subfunctions.  Previously, unknown_bootoption() was
> the last parse_args() subfunction to run, and it carefully put back
> the '=' character.  Now ignore_unknown_bootoption() is the last
> one to run, and it wasn't doing the necessary repair, so the
> envp params ended up with the embedded NUL and were no longer
> seen as valid environment variables by init.

This patch has been stuck in your tree for a week or two.  The copy
there is missing Woody's Tested-by and (I suspect) his Reported-by and
Pawel's Acked-by.

And because that patch is already in linux-next, I can't (or rather
don't want to) merge it myself.

It needs to be merged into 3.4.  Please fix up the changelog data and
send it in?

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