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Subject: media: uvcvideo: Avoid returning invalid controls
Author:  Ricardo Ribalda <[email protected]>
Date:    Wed Dec 1 06:22:18 2021 +0100

If the memory where ctrl_found is placed has the value of uvc_ctrl and
__uvc_find_control does not find the control we will return an invalid
index.

Fixes: 6350d6a4ed487 ("media: uvcvideo: Set error_idx during ctrl_commit 
errors")
Signed-off-by: Ricardo Ribalda <[email protected]>
Signed-off-by: Laurent Pinchart <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

 drivers/media/usb/uvc/uvc_ctrl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

---

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 9a25d6029255..b4f6edf968bc 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -1639,7 +1639,7 @@ static int uvc_ctrl_find_ctrl_idx(struct uvc_entity 
*entity,
                                  struct uvc_control *uvc_control)
 {
        struct uvc_control_mapping *mapping = NULL;
-       struct uvc_control *ctrl_found;
+       struct uvc_control *ctrl_found = NULL;
        unsigned int i;
 
        if (!entity)

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