Re: [PATCH] hfsplus: fix NULL dereference in hfsplus_lookup()

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On Tue, Aug 21, 2018 at 04:05:25PM -0700, Andrew Morton wrote:
> On Thu, 12 Jul 2018 15:55:33 -0700 Viacheslav Dubeyko <slava@xxxxxxxxxxx> wrote:
> 
> > On Thu, 2018-07-12 at 18:53 -0300, Ernesto A. Fernández wrote:
> > > Check that the hidden directory is not NULL before using it, instead of
> > > after.
> > > 
> > > Reported-by: Wen Xu <wen.xu@xxxxxxxxxx>
> > > Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez@xxxxxxxxx>
> > > ---
> > 
> > It's really hard to understand this simple patch. I believe it makes
> > sense to rework the patch slightly with the goal to make it more clear.
> > Also, it will be great to add a short comment in the code to explain
> > what's wrong.

I don't think it's reasonable to expect a comment explaining why we can't
dereference NULL.

> > I think it makes sense to split this long check condition on something
> > more clear, simple and elegant.

The long check condition may not be ideal, but there's a lot of code in
the module that could use style improvements. I don't think that should be
a priority right now, with plenty of serious bugs left to fix.

> 
> No response, causing this patch to be stuck in limbo land?

I believe I sent a second version of this patch.


Ernest



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