4.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hans Verkuil <hansverk@xxxxxxxxx>
commit 273caa260035c03d89ad63d72d8cd3d9e5c5e3f1 upstream.
If the device is of type VFL_TYPE_SUBDEV then vdev->ioctl_ops
is NULL so the 'if (!ops->vidioc_query_ext_ctrl)' check would crash.
Add a test for !ops to the condition.
All sub-devices that have controls will use the control framework,
so they do not have an equivalent to ops->vidioc_query_ext_ctrl.
Returning false if ops is NULL is the correct thing to do here.
Fixes: b8c601e8af ("v4l2-compat-ioctl32.c: fix ctrl_is_pointer")
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Reported-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -770,7 +770,7 @@ static inline bool ctrl_is_pointer(struc
return ctrl && ctrl->is_ptr;
}
- if (!ops->vidioc_query_ext_ctrl)
+ if (!ops || !ops->vidioc_query_ext_ctrl)
return false;
return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&