Re: [PATCH] kconfig: Avoid buffer underrun in choice input

From: Sam Ravnborg
Date: Sat Apr 23 2011 - 14:04:57 EST


On Sat, Apr 23, 2011 at 06:42:56PM +0100, Ben Hutchings wrote:
> commit 40aee729b350672c2550640622416a855e27938f ('kconfig: fix default
> value for choice input') fixed some cases where kconfig would select
> the wrong option from a choice with a single valid option and thus
> enter an infinite loop.
>
> However, this broke the test for user input of the form 'N?', because
> when kconfig selects the single valid option the input is zero-length
> and the test will read the byte before the input buffer. If this
> happens to contain '?' (as it will in a mips build on Debian unstable
> today) then kconfig again enters an infinite loop.
>
> Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxx [2.6.17+]
> ---
> Roman has failed to respond to this after 5 weeks and one reminder, so
> please take it directly.

No-one has heard from Roman Zippel in several years.
I have suggested Michal Marek to take over the maintainer
role - as he in practice is the kconfig maintainer.

Sam
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