Re: [PATCH] ovl: pass an explicit reference of creators creds to callers

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On Thu, Nov 14, 2024 at 12:03:16PM +0100, Amir Goldstein wrote:
> On Thu, Nov 14, 2024 at 11:12 AM Christian Brauner <brauner@xxxxxxxxxx> wrote:
> >
> > On Thu, Nov 14, 2024 at 11:05:36AM +0100, Amir Goldstein wrote:
> > > ovl_setup_cred_for_create() decrements one refcount of new creds and
> > > ovl_revert_creds() in callers decrements the last refcount.
> > >
> > > In preparation to revert_creds_light() back to caller creds, pass an
> > > explicit reference of the creators creds to the callers and drop the
> > > refcount explicitly in the callers after ovl_revert_creds().
> > >
> > > Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
> > > ---
> > >
> > > Miklos, Christian,
> > >
> > > I was chasing a suspect memleak in revert_creds_light() patches.
> > > This fix is unrelated to memleak but I think it is needed for
> > > correctness anyway.
> > >
> > > This applies in the middle of the series after adding the
> > > ovl_revert_creds() helper.
> >
> > I'm going to try and reproduce the kmemleak with your ovl_creds branch
> > as is and then retry with the series applied as is plus one small fix
> > you correctly pointed out.
> 
> Don't bother. The fix that Vinicius sent me was correct.
> I still want to use this patch, so would appreciate a review.

Ah, thanks for letting me know!




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