linux-kernel - Re: [PATCH -next] cred: add missing return error code when set_cred

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Date:   Fri, 28 May 2021 13:40:57 +0200
From:   Alexey Gladkov <legion@...nel.org>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Yang Yingliang <yangyingliang@...wei.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] cred: add missing return error code when
 set_cred_ucounts() failed

On Thu, May 27, 2021 at 11:10:27AM -0500, Eric W. Biederman wrote:
> Alexey Gladkov <legion@...nel.org> writes:
> 
> > On Wed, May 26, 2021 at 05:10:43PM -0500, Eric W. Biederman wrote:
> >> Yang Yingliang <yangyingliang@...wei.com> writes:
> >> 
> >> > If set_cred_ucounts() failed, we need return the error code.
> >> 
> >> Alex how does this look to you?
> >> 
> >> This is showing up now as I have finally dropped the code in linux-next
> >> and other people are looking at it.
> >> 
> >> At a quick fix looks correct to me.
> >
> > Yes, this is the right fix. I miss it.
> 
> 
> Can I have your Acked-by or Reviewed-by.
> Thank you.

Yes.

Reviewed-by: Alexey Gladkov <legion@...nel.org>
Acked-by: Alexey Gladkov <legion@...nel.org>

> >> > Fixes: 905ae01c4ae2 ("Add a reference to ucounts for each cred")
> >> > Reported-by: Hulk Robot <hulkci@...wei.com>
> >> > Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
> >> > ---
> >> >  kernel/cred.c | 3 ++-
> >> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >> >
> >> > diff --git a/kernel/cred.c b/kernel/cred.c
> >> > index db7c46bf36e5..e6fd2b3fc31f 100644
> >> > --- a/kernel/cred.c
> >> > +++ b/kernel/cred.c
> >> > @@ -372,7 +372,8 @@ int copy_creds(struct task_struct *p, unsigned long clone_flags)
> >> >  		ret = create_user_ns(new);
> >> >  		if (ret < 0)
> >> >  			goto error_put;
> >> > -		if (set_cred_ucounts(new) < 0)
> >> > +		ret = set_cred_ucounts(new);
> >> > +		if (ret < 0)
> >> >  			goto error_put;
> >> >  	}
> >> 
> 
> Eric
> 

-- 
Rgrds, legion