Re: [PATCH] befs: fix return value check in befs_iget()

[Dan Carpenter]

On Wed, Oct 30, 2013 at 10:52:38AM -0700, Kees Cook wrote:
> On Mon, Oct 28, 2013 at 7:00 PM, Wei Yongjun <weiyj.lk@xxxxxxxxx> wrote:
> > From: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
> >
> > In case of error, the function iget_locked() returns NULL pointer
> > not ERR_PTR(). The IS_ERR() test in the return value check should
> > be replaced with NULL test.
> >
> > Signed-off-by: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
> 
> Good catch, thanks!
> 
> Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
> 
> As an aside, Dan, how hard would this kind of mismatch be to detect
> with smatch?

It already does, but you need the cross function database set up.

regards,
dan carpenter

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