drivers/media/video/v4l2-compat-ioctl32.c: Check the return value of copy_to_user

Commit Message

Thiago Farina Dec. 21, 2010, 1:18 a.m. UTC

None

Patch

diff --git a/drivers/media/video/v4l2-compat-ioctl32.c b/drivers/media/video/v4l2-compat-ioctl32.c
index e30e8df..55825ec 100644
--- a/drivers/media/video/v4l2-compat-ioctl32.c
+++ b/drivers/media/video/v4l2-compat-ioctl32.c
@@ -206,7 +206,9 @@  static struct video_code __user *get_microcode32(struct video_code32 *kp)
 	 * user address is invalid, the native ioctl will do
 	 * the error handling for us
 	 */
-	(void) copy_to_user(up->loadwhat, kp->loadwhat, sizeof(up->loadwhat));
+	if (copy_to_user(up->loadwhat, kp->loadwhat, sizeof(up->loadwhat)))
+		return NULL;
+
 	(void) put_user(kp->datasize, &up->datasize);
 	(void) put_user(compat_ptr(kp->data), &up->data);
 	return up;