linux-kernel - Re: [patch 6/8] cifs: use kzfree()

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Date:	Mon, 16 Feb 2009 13:02:18 -0600
From:	Steve French <smfrench@...il.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 6/8] cifs: use kzfree()

Looks fine to me:

Acked-by: Steve French <sfrench@...ibm.com>

On Mon, Feb 16, 2009 at 9:33 AM, Johannes Weiner <hannes@...xchg.org> wrote:
>
> On Mon, Feb 16, 2009 at 05:13:30PM +0200, Pekka Enberg wrote:
> > Hi Johannes,
> >
> > On Mon, Feb 16, 2009 at 4:29 PM, Johannes Weiner <hannes@...xchg.org> wrote:
> > > @@ -2433,11 +2433,8 @@ mount_fail_check:
> > >  out:
> > >        /* zero out password before freeing */
> > >        if (volume_info) {
> > > -               if (volume_info->password != NULL) {
> > > -                       memset(volume_info->password, 0,
> > > -                               strlen(volume_info->password));
> > > -                       kfree(volume_info->password);
> > > -               }
> > > +               if (volume_info->password != NULL)
> > > +                       kzfree(volume_info->password);
> >
> > The NULL check here is unnecessary.
> >
> > >                kfree(volume_info->UNC);
> > >                kfree(volume_info->prepath);
> > >                kfree(volume_info);
> > > --- a/fs/cifs/misc.c
> > > +++ b/fs/cifs/misc.c
> > > @@ -97,10 +97,8 @@ sesInfoFree(struct cifsSesInfo *buf_to_f
> > >        kfree(buf_to_free->serverOS);
> > >        kfree(buf_to_free->serverDomain);
> > >        kfree(buf_to_free->serverNOS);
> > > -       if (buf_to_free->password) {
> > > -               memset(buf_to_free->password, 0, strlen(buf_to_free->password));
> > > -               kfree(buf_to_free->password);
> > > -       }
> > > +       if (buf_to_free->password)
> > > +               kzfree(buf_to_free->password);
> >
> > And here.
>
> Thanks, Pekka!
>
> Here is the delta to fold into the above:
>
> [ btw, do these require an extra SOB?  If so:
>  Signed-off-by: Johannes Weiner <hannes@...xchg.org>
>
>  And for http://lkml.org/lkml/2009/2/16/184:
>  Signed-off-by: Johannes Weiner <hannes@...xchg.org> ]
>
> --- a/fs/cifs/connect.c
> +++ b/fs/cifs/connect.c
> @@ -2433,8 +2433,7 @@ mount_fail_check:
>  out:
>        /* zero out password before freeing */
>        if (volume_info) {
> -               if (volume_info->password != NULL)
> -                       kzfree(volume_info->password);
> +               kzfree(volume_info->password);
>                kfree(volume_info->UNC);
>                kfree(volume_info->prepath);
>                kfree(volume_info);
> --- a/fs/cifs/misc.c
> +++ b/fs/cifs/misc.c
> @@ -97,8 +97,7 @@ sesInfoFree(struct cifsSesInfo *buf_to_f
>        kfree(buf_to_free->serverOS);
>        kfree(buf_to_free->serverDomain);
>        kfree(buf_to_free->serverNOS);
> -       if (buf_to_free->password)
> -               kzfree(buf_to_free->password);
> +       kzfree(buf_to_free->password);
>        kfree(buf_to_free->domainName);
>        kfree(buf_to_free);
>  }
> @@ -130,8 +129,7 @@ tconInfoFree(struct cifsTconInfo *buf_to
>        }
>        atomic_dec(&tconInfoAllocCount);
>        kfree(buf_to_free->nativeFileSystem);
> -       if (buf_to_free->password)
> -               kzfree(buf_to_free->password);
> +       kzfree(buf_to_free->password);
>        kfree(buf_to_free);
>  }
>



--
Thanks,

Steve
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