Hi Johan

Thank you for the patch

BR

Fabien

On 10/10/2019 3:13 PM, Johan Hovold wrote:

If a process is interrupted while accessing the video device and the device lock is contended, release() could return early and fail to free related resources.

Note that the return value of the v4l2 release file operation is ignored.

Fixes: 28ffeebbb7bd ("[media] bdisp: 2D blitter driver using v4l2 mem2mem framework") Cc: stable stable@vger.kernel.org # 4.2 Cc: Fabien Dessenne fabien.dessenne@st.com Cc: Hans Verkuil hans.verkuil@cisco.com Cc: Mauro Carvalho Chehab mchehab@osg.samsung.com Signed-off-by: Johan Hovold johan@kernel.org

Reviewed-by: Fabien Dessenne fabien.dessenne@st.com

---

drivers/media/platform/sti/bdisp/bdisp-v4l2.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/media/platform/sti/bdisp/bdisp-v4l2.c b/drivers/media/platform/sti/bdisp/bdisp-v4l2.c index e90f1ba30574..675b5f2b4c2e 100644 --- a/drivers/media/platform/sti/bdisp/bdisp-v4l2.c +++ b/drivers/media/platform/sti/bdisp/bdisp-v4l2.c @@ -651,8 +651,7 @@ static int bdisp_release(struct file *file) dev_dbg(bdisp->dev, "%s\n", __func__);

• if (mutex_lock_interruptible(&bdisp->lock))

• return -ERESTARTSYS;
  

• mutex_lock(&bdisp->lock);

v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);