Re: [dpdk-dev] [dpdk-stable] [PATCH v3 1/2] eal: fix memory leak when removing event_cb

[wangyunjian <wangyunjian@huawei.com>]

> -----Original Message-----
> From: David Marchand [mailto:david.marchand@redhat.com]
> Sent: Friday, July 3, 2020 3:23 PM
> To: wangyunjian <wangyunjian@huawei.com>
> Cc: dev <dev@dpdk.org>; Jeff Guo <jia.guo@intel.com>; Lilijun (Jerry)
> <jerry.lilijun@huawei.com>; xudingke <xudingke@huawei.com>; dpdk stable
> <stable@dpdk.org>
> Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v3 1/2] eal: fix memory leak when
> removing event_cb
> 
> On Thu, Jul 2, 2020 at 1:47 PM wangyunjian <wangyunjian@huawei.com>
> wrote:
> >
> > From: Yunjian Wang <wangyunjian@huawei.com>
> >
> > The event_cb->dev_name is not freed when freeing event_cb, and this
> > causes a memory leak.
> >
> > Fixes: a753e53d517b ("eal: add device event monitor framework")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> > ---
> >  lib/librte_eal/common/eal_common_dev.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/lib/librte_eal/common/eal_common_dev.c
> > b/lib/librte_eal/common/eal_common_dev.c
> > index 9e4f09d..4cfdb80 100644
> > --- a/lib/librte_eal/common/eal_common_dev.c
> > +++ b/lib/librte_eal/common/eal_common_dev.c
> > @@ -526,6 +526,8 @@ static int cmp_dev_name(const struct rte_device
> *dev, const void *_name)
> >                  */
> >                 if (event_cb->active == 0) {
> >                         TAILQ_REMOVE(&dev_event_cbs, event_cb,
> next);
> > +                       if (event_cb->dev_name)
> > +                               free(event_cb->dev_name);
> 
> No need for the check, free handles a NULL pointer just fine.

Thanks for your suggestion, will send the v4 later.

> 
> Please, could you update your series/patches status in patchwork?
> I am a bit lost at what is superseded or not.

My mistake, please discard them.
https://patchwork.dpdk.org/patch/70824/
https://patchwork.dpdk.org/patch/70825/
https://patchwork.dpdk.org/patch/70826/
https://patchwork.dpdk.org/patch/72452/
https://patchwork.dpdk.org/patch/72825/
https://patchwork.dpdk.org/patch/72826/

Thanks,
Yunjian

> 
> 
> Thanks.
> 
> --
> David Marchand