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References: <20210315123406.1523607-1-ribalda@chromium.org> <34c90095-bcbf-5530-786a-e709cc493fa9@linux.intel.com>
In-Reply-To: <34c90095-bcbf-5530-786a-e709cc493fa9@linux.intel.com>
From:   Ricardo Ribalda <ribalda@chromium.org>
Date:   Tue, 16 Mar 2021 18:50:20 +0100
Message-ID: <CANiDSCvMvYVN0+zN3du2pJfGLPJ_f7Ees2YrfybJgUDmBjq2jQ@mail.gmail.com>
Subject: Re: [PATCH v2 1/2] media: staging/intel-ipu3: Fix memory leak in imu_fmt
To:     Bingbu Cao <bingbu.cao@linux.intel.com>
Cc:     Sakari Ailus <sakari.ailus@linux.intel.com>,
        Bingbu Cao <bingbu.cao@intel.com>,
        Tianshu Qiu <tian.shu.qiu@intel.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Linux Media Mailing List <linux-media@vger.kernel.org>,
        devel@driverdev.osuosl.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        stable@vger.kernel.org
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Hi Bingbu

Thanks for your review

On Tue, Mar 16, 2021 at 12:29 PM Bingbu Cao <bingbu.cao@linux.intel.com> wrote:
>
> Hi, Ricardo
>
> Thanks for your patch.
> It looks fine for me, do you mind squash 2 patchsets into 1 commit?

Are you sure? There are two different issues that we are solving.

Best regards!

>
> On 3/15/21 8:34 PM, Ricardo Ribalda wrote:
> > We are losing the reference to an allocated memory if try. Change the
> > order of the check to avoid that.
> >
> > Cc: stable@vger.kernel.org
> > Fixes: 6d5f26f2e045 ("media: staging/intel-ipu3-v4l: reduce kernel stack usage")
> > Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
> > ---
> >  drivers/staging/media/ipu3/ipu3-v4l2.c | 11 +++++++----
> >  1 file changed, 7 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/staging/media/ipu3/ipu3-v4l2.c b/drivers/staging/media/ipu3/ipu3-v4l2.c
> > index 60aa02eb7d2a..35a74d99322f 100644
> > --- a/drivers/staging/media/ipu3/ipu3-v4l2.c
> > +++ b/drivers/staging/media/ipu3/ipu3-v4l2.c
> > @@ -693,6 +693,13 @@ static int imgu_fmt(struct imgu_device *imgu, unsigned int pipe, int node,
> >               if (inode == IMGU_NODE_STAT_3A || inode == IMGU_NODE_PARAMS)
> >                       continue;
> >
> > +             /* CSS expects some format on OUT queue */
> > +             if (i != IPU3_CSS_QUEUE_OUT &&
> > +                 !imgu_pipe->nodes[inode].enabled) {
> > +                     fmts[i] = NULL;
> > +                     continue;
> > +             }
> > +
> >               if (try) {
> >                       fmts[i] = kmemdup(&imgu_pipe->nodes[inode].vdev_fmt.fmt.pix_mp,
> >                                         sizeof(struct v4l2_pix_format_mplane),
> > @@ -705,10 +712,6 @@ static int imgu_fmt(struct imgu_device *imgu, unsigned int pipe, int node,
> >                       fmts[i] = &imgu_pipe->nodes[inode].vdev_fmt.fmt.pix_mp;
> >               }
> >
> > -             /* CSS expects some format on OUT queue */
> > -             if (i != IPU3_CSS_QUEUE_OUT &&
> > -                 !imgu_pipe->nodes[inode].enabled)
> > -                     fmts[i] = NULL;
> >       }
> >
> >       if (!try) {
> >
>
> --
> Best regards,
> Bingbu Cao


-- 
Ricardo Ribalda