[PATCH] media: v4l2-compat-ioctl32: fix missing length copy in put_v4l2_buffer32

[Tiffany Lin]

In v4l2-compliance utility, test QUERYBUF required correct length
value to go through each planar to check planar's length in multi-planar

Signed-off-by: Tiffany Lin <tiffany.lin at mediatek.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index 327e83a..5ba932a 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -521,6 +521,9 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 		if (num_planes == 0)
 			return 0;
 
+		if (put_user(kp->length, &up->length))
+			return -EFAULT;
+
 		uplane = (__force struct v4l2_plane __user *)kp->m.planes;
 		if (get_user(p, &up->m.planes))
 			return -EFAULT;
-- 
1.7.9.5