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

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]

Message-ID: <518905E6.5050502@suse.cz>
Date:	Tue, 07 May 2013 15:47:18 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	"Yann E. MORIN" <yann.morin.1998@...e.fr>
Cc:	Li Zefan <lizefan@...wei.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Weng Meiling <wengmeiling.weng@...wei.com>,
	Libo Chen <clbchenlibo.chen@...wei.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-kbuild@...r.kernel.org, Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH] menuconfig: fix NULL pointer dereference when searching
 a symbol

On 7.5.2013 15:21, Yann E. MORIN wrote:
> Li, All,
> 
> 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").
>>
>> Reported-by: Borislav Petkov <bp@...en8.de>
>> Signed-off-by: Li Zefan <lizefan@...wei.com>
> 
> Reviewed-by: "Yann E. MORIN" <yann.morin.1998@...e.fr>
> 
> Michal, I'll get this in my tree, and will send a pull-request to you
> later (I may have a few other smallish fixes shortly).

It's difficult to apply this to kbuild.git#kconfig, because the bug that
it is fixing is not there. I will send it to Linus by mail.

Michal
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/