Re: [PATCH] 9p: fix: Uninitialized variable p.

[Dominique Martinet <asmadeus@codewreck.org>]

YANG LI wrote on Wed, Dec 30, 2020:
> The pointer p is being used but it isn't being initialized,
> need to assign a NULL to it.

My understanding is p has to be initialized: the only way out of the
while(1) loop below sets it.


I don't mind fixing false positive warnings as it makes maintenance
easier for everyone, but:

 1/ the commit message needs to reflect that and at least name which
tool had a problem with it. I'm tempted to think this case is common
enough that the tool ought to be fixed instead...

 2/ the code needs to work in the p=NULL case if you set it that way
(right now, it doesn't, so in the event the code changes in the future
and there really comes a way to skip initialization this change would
actually hinder bug detection -- it'd need to add a p == NULL check
below, which is going to be useless code, but hopefully compilers will
optimize it away)


Thanks,
-- 
Dominique