From: Li Zefan <lizefan@huawei.com>
Date: Tue, 7 May 2013 13:56:54 +0000 (+0200)
Subject: menuconfig: fix NULL pointer dereference when searching a symbol
X-Git-Tag: 1.9.9~28
X-Git-Url: https://jxself.org/git/?a=commitdiff_plain;h=e5ef38a8fa9ef524c3ef061083ce35d1529e5ea0;hp=e5ef38a8fa9ef524c3ef061083ce35d1529e5ea0;p=carl9170fw.git

menuconfig: fix NULL pointer dereference when searching a symbol

Searching for PPC_EFIKA results in a 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-and-tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Li Zefan <lizefan@huawei.com>
Tested-by: Libo Chen <libo.chen@huawei.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
---