linux-kernel - Re: [PATCH] menuconfig: fix NULL pointer dereference when searching a symbol

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Message-ID: <20130507104455.GB7633@pd.tnic>
Date:	Tue, 7 May 2013 12:44:55 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Li Zefan <lizefan@...wei.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Marek <mmarek@...e.cz>,
	Weng Meiling <wengmeiling.weng@...wei.com>,
	Libo Chen <clbchenlibo.chen@...wei.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] menuconfig: fix NULL pointer dereference when searching
 a symbol

On Tue, May 07, 2013 at 10:40:59AM +0800, Li Zefan wrote:
> Searching PPC_EFIKA results segmentation fault, and it's because
> get_symbol_prop() returns NULL.
> 
> In this case CONFIG_PPC_EFIKA is defined in arch/powerpc/platforms/
> 52xx/Kconfig, so it won't be parsed if ARCH!=PPC, but menuconfig
> knows this symbol when it parses sound/soc/fsl/Kconfig:
> 
> config SND_MPC52xx_SOC_EFIKA
>         tristate "SoC AC97 Audio support for bbplan Efika and STAC9766"
>         depends on PPC_EFIKA
> 
> This bug was introduced by commit bcdedcc1afd6 ("menuconfig: print more
> info for symbol without prompts").

Yep, it works.

> Reported-by: Borislav Petkov <bp@...en8.de>

	..-and-tested-by: ...

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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