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 <[email protected]>
Signed-off-by: Li Zefan <[email protected]>
Tested-by: Libo Chen <[email protected]>
Reviewed-by: "Yann E. MORIN" <[email protected]>
Signed-off-by: Michal Marek <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions