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

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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.




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