linux-kernel - Re: [PATCH v2] powerpc: Remove inaccessible CMDLINE default

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

Date:   Thu, 11 Jun 2020 07:46:32 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>,
        mpe@...erman.id.au, benh@...nel.crashing.org, paulus@...ba.org,
        christophe.leroy@....fr
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] powerpc: Remove inaccessible CMDLINE default



Le 11/06/2020 à 05:41, Chris Packham a écrit :
> Since commit cbe46bd4f510 ("powerpc: remove CONFIG_CMDLINE #ifdef mess")
> CONFIG_CMDLINE has always had a value regardless of CONFIG_CMDLINE_BOOL.
> 
> For example:
> 
>   $ make ARCH=powerpc defconfig
>   $ cat .config
>   # CONFIG_CMDLINE_BOOL is not set
>   CONFIG_CMDLINE=""
> 
> When enabling CONFIG_CMDLINE_BOOL this value is kept making the 'default
> "..." if CONFIG_CMDLINE_BOOL' ineffective.
> 
>   $ ./scripts/config --enable CONFIG_CMDLINE_BOOL
>   $ cat .config
>   CONFIG_CMDLINE_BOOL=y
>   CONFIG_CMDLINE=""
> 
> Remove CONFIG_CMDLINE_BOOL and the inaccessible default.

You also have to remove all CONFIG_CMDLINE_BOOL from the defconfigs

Christophe

> 
> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
> Reviewed-by: Christophe Leroy <christophe.leroy@....fr>
> ---
> It took me a while to get round to sending a v2, for a refresher v1 can be found here:
> 
> http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20190802050232.22978-1-chris.packham@alliedtelesis.co.nz/
> 
> Changes in v2:
> - Rebase on top of Linus's tree
> - Fix some typos in commit message
> - Add review from Christophe
> - Remove CONFIG_CMDLINE_BOOL
> 
>   arch/powerpc/Kconfig | 6 +-----
>   1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 9fa23eb320ff..51abc59c3334 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -859,12 +859,8 @@ config PPC_DENORMALISATION
>   	  Add support for handling denormalisation of single precision
>   	  values.  Useful for bare metal only.  If unsure say Y here.
>   
> -config CMDLINE_BOOL
> -	bool "Default bootloader kernel arguments"
> -
>   config CMDLINE
> -	string "Initial kernel command string" if CMDLINE_BOOL
> -	default "console=ttyS0,9600 console=tty0 root=/dev/sda2" if CMDLINE_BOOL
> +	string "Initial kernel command string"
>   	default ""
>   	help
>   	  On some platforms, there is currently no way for the boot loader to
>