Hi Tiffany, Good catch! But looking through the compat code I noticed that in the single-planar DMABUF case the length field is also never copied. I think it would be much simpler if the length field is just always copied instead of in each multiplanar or singleplanar mmap/userptr/dmabuf case. It will simplify the code and prevent such mistakes in the future. Can you make a v2 that makes that change? Thanks! Hans On 01/14/2016 08:37 AM, Tiffany Lin wrote: > 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@xxxxxxxxxxxx> > --- > 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; > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
