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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2017-08-30 13:18:04 -0400
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-10-31 13:51:45 -0400
commitb6ee3f0dcf43dc3e8dbbe9be9c4e728c8d52f1ba (patch)
tree4171a3b2634b8238b12188cd55fd629157efaeb6 /drivers/media/platform/ti-vpe/cal.c
parentbce9e317cec9c4ffff3dde1170c0ad70f5e690c8 (diff)
media: v4l: async: Move async subdev notifier operations to a separate structure
The async subdev notifier .bound(), .unbind() and .complete() operations are function pointers stored directly in the v4l2_async_subdev structure. As the structure isn't immutable, this creates a potential security risk as the function pointers are mutable. To fix this, move the function pointers to a new v4l2_async_subdev_operations structure that can be made const in drivers. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/platform/ti-vpe/cal.c')
-rw-r--r--drivers/media/platform/ti-vpe/cal.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c
index 42e383a48ffe..8b586c864524 100644
--- a/drivers/media/platform/ti-vpe/cal.c
+++ b/drivers/media/platform/ti-vpe/cal.c
@@ -1522,6 +1522,11 @@ static int cal_async_complete(struct v4l2_async_notifier *notifier)
return 0;
}
+static const struct v4l2_async_notifier_operations cal_async_ops = {
+ .bound = cal_async_bound,
+ .complete = cal_async_complete,
+};
+
static int cal_complete_ctx(struct cal_ctx *ctx)
{
struct video_device *vfd;
@@ -1736,8 +1741,7 @@ static int of_cal_create_instance(struct cal_ctx *ctx, int inst)
ctx->asd_list[0] = asd;
ctx->notifier.subdevs = ctx->asd_list;
ctx->notifier.num_subdevs = 1;
- ctx->notifier.bound = cal_async_bound;
- ctx->notifier.complete = cal_async_complete;
+ ctx->notifier.ops = &cal_async_ops;
ret = v4l2_async_notifier_register(&ctx->v4l2_dev,
&ctx->notifier);
if (ret) {

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