linux-kernel - Re: kernel command line from u-boot

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <Pine.LNX.4.64.0808071050280.9798@vixen.sonytel.be>
Date:	Thu, 7 Aug 2008 10:54:36 +0200 (CEST)
From:	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
To:	Amol Lad <amol.lad@...il.com>
cc:	linux-embedded <linux-embedded@...r.kernel.org>,
	Linux Kernel Development <linux-kernel@...r.kernel.org>
Subject: Re: kernel command line from u-boot

On Thu, 7 Aug 2008, Amol Lad wrote:
> It seems that there is a small problem when kernel parses the command
> line passed by u-boot.

It doesn't seem to be specific to u-boot...

> For example, when I add "board=myboard boardid=1" in the command line
> and register handler in kernel as __setup("board", board_setup), then
> the board_setup function is called twice : once with argument
> "myboard" and second time with argument "d=1". So kernel is calling
                                           ^^^
Wow, when init/main.c:obsolete_checksetup() matches the `board' part,
it ignores the next character (`i'), assuming this is `=', and passes
the remainder (`d=1').

> handler registered for param "board" for "boardid" also. Is this ok ?

I don't think this is OK.

Probably nobody noticed as this part of the code takes care of the
`obsolete-style' parameters. `module_param' is the new way.

With kind regards,

Geert Uytterhoeven
Software Architect

Sony Techsoft Centre Europe
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium

Phone:    +32 (0)2 700 8453
Fax:      +32 (0)2 700 8622
E-mail:   Geert.Uytterhoeven@...ycom.com
Internet: http://www.sony-europe.com/

A division of Sony Europe (Belgium) N.V.
VAT BE 0413.825.160 · RPR Brussels
Fortis 293-0376800-10 GEBA-BE-BB