Re: [Nbd] [PATCH] nbd: don't leak nbd_config
- To: Ilya Dryomov <idryomov@...17...>
- Cc: Jens Axboe <axboe@...2204...>, Josef Bacik <jbacik@...2204...>, linux-block@...25..., nbd-general@lists.sourceforge.net, Josef Bacik <josef@...2877...>
- Subject: Re: [Nbd] [PATCH] nbd: don't leak nbd_config
- From: Josef Bacik <josef@...2877...>
- Date: Tue, 23 May 2017 10:30:29 -0400
- Message-id: <20170523143029.GA3915@...2930...>
- In-reply-to: <CAOi1vP-MEe6deZzwHt1btXALrDshwcxM79ZrG0uaGd1wRV_xWA@...18...>
- References: <1495535911-29036-1-git-send-email-idryomov@...17...> <20170523141445.GA1568@...2930...> <8e9d481e-462e-c3f7-8c35-d80f87d1de9a@...2204...> <CAOi1vP-MEe6deZzwHt1btXALrDshwcxM79ZrG0uaGd1wRV_xWA@...18...>
On Tue, May 23, 2017 at 04:27:56PM +0200, Ilya Dryomov wrote:
> On Tue, May 23, 2017 at 4:16 PM, Jens Axboe <axboe@...2204...> wrote:
> > On 05/23/2017 08:14 AM, Josef Bacik wrote:
> >> On Tue, May 23, 2017 at 12:38:31PM +0200, Ilya Dryomov wrote:
> >>> nbd_config is allocated in nbd_alloc_config(), but never freed.
> >>>
> >>> Fixes: 5ea8d10802ec ("nbd: separate out the config information")
> >>> Signed-off-by: Ilya Dryomov <idryomov@...17...>
> >>> ---
> >>> drivers/block/nbd.c | 1 +
> >>> 1 file changed, 1 insertion(+)
> >>>
> >>
> >> Oops, thanks Ilya
> >>
> >> Reviewed-by: Josef Bacik <jbacik@...2204...>
> >
> > Since config is referenced, why isn't this done in nbd_config_put()
> > instead?
>
> Josef's 5ea8d10802ec added that nbd->config = NULL to nbd_reset(), so
> I followed his lead. It could be done nbd_config_put() -- nbd_reset()
> call in nbd_dev_add() looks like a no-op to me. Josef?
>
Yeah it used to be called more, but when I moved the config to be ref counted it
lost it's old uses and I just didn't notice enough to delete it. Just fold that
into nbd_config_put() and call it a day. Thanks,
Josef
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