linux-kernel - [PATCH 4.17 201/336] media: media-device: fix ioctl function types

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Date:   Wed,  1 Aug 2018 18:48:56 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sami Tolvanen <samitolvanen@...gle.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.17 201/336] media: media-device: fix ioctl function types

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sami Tolvanen <samitolvanen@...gle.com>

[ Upstream commit daa36370b62428cca6d48d1b2530a8419f631c8c ]

This change fixes function types for media device ioctls to avoid
indirect call mismatches with Control-Flow Integrity checking.

Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>
Acked-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@...co.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/media/media-device.c |   21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -54,9 +54,10 @@ static int media_device_close(struct fil
 	return 0;
 }
 
-static int media_device_get_info(struct media_device *dev,
-				 struct media_device_info *info)
+static long media_device_get_info(struct media_device *dev, void *arg)
 {
+	struct media_device_info *info = arg;
+
 	memset(info, 0, sizeof(*info));
 
 	if (dev->driver_name[0])
@@ -93,9 +94,9 @@ static struct media_entity *find_entity(
 	return NULL;
 }
 
-static long media_device_enum_entities(struct media_device *mdev,
-				       struct media_entity_desc *entd)
+static long media_device_enum_entities(struct media_device *mdev, void *arg)
 {
+	struct media_entity_desc *entd = arg;
 	struct media_entity *ent;
 
 	ent = find_entity(mdev, entd->id);
@@ -146,9 +147,9 @@ static void media_device_kpad_to_upad(co
 	upad->flags = kpad->flags;
 }
 
-static long media_device_enum_links(struct media_device *mdev,
-				    struct media_links_enum *links)
+static long media_device_enum_links(struct media_device *mdev, void *arg)
 {
+	struct media_links_enum *links = arg;
 	struct media_entity *entity;
 
 	entity = find_entity(mdev, links->entity);
@@ -195,9 +196,9 @@ static long media_device_enum_links(stru
 	return 0;
 }
 
-static long media_device_setup_link(struct media_device *mdev,
-				    struct media_link_desc *linkd)
+static long media_device_setup_link(struct media_device *mdev, void *arg)
 {
+	struct media_link_desc *linkd = arg;
 	struct media_link *link = NULL;
 	struct media_entity *source;
 	struct media_entity *sink;
@@ -225,9 +226,9 @@ static long media_device_setup_link(stru
 	return __media_entity_setup_link(link, linkd->flags);
 }
 
-static long media_device_get_topology(struct media_device *mdev,
-				      struct media_v2_topology *topo)
+static long media_device_get_topology(struct media_device *mdev, void *arg)
 {
+	struct media_v2_topology *topo = arg;
 	struct media_entity *entity;
 	struct media_interface *intf;
 	struct media_pad *pad;