linux-kernel - Re: [PATCH v2 1/2] media: staging/intel-ipu3: Fix memory leak in imu

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Date:   Wed, 17 Mar 2021 14:47:48 +0800
From:   Bingbu Cao <bingbu.cao@...ux.intel.com>
To:     Ricardo Ribalda <ribalda@...omium.org>
Cc:     Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Bingbu Cao <bingbu.cao@...el.com>,
        Tianshu Qiu <tian.shu.qiu@...el.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        devel@...verdev.osuosl.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH v2 1/2] media: staging/intel-ipu3: Fix memory leak in
 imu_fmt


On 3/17/21 1:50 AM, Ricardo Ribalda wrote:
> Hi Bingbu
> 
> Thanks for your review
> 
> On Tue, Mar 16, 2021 at 12:29 PM Bingbu Cao <bingbu.cao@...ux.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.

Oh, I see. I thought you were fixing 1 issue here.
Thanks!

> 
> 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@...r.kernel.org
>>> Fixes: 6d5f26f2e045 ("media: staging/intel-ipu3-v4l: reduce kernel stack usage")
>>> Signed-off-by: Ricardo Ribalda <ribalda@...omium.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
> 
> 
> 

-- 
Best regards,
Bingbu Cao