Hi Tiffany,
Thank you for the patch.
On Friday 15 January 2016 17:13:36 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 buffer type
>
> Signed-off-by: Tiffany Lin <tiffany.lin@xxxxxxxxxxxx>
> ---
> drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 21 ++++++++++-----------
> 1 file changed, 10 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
> b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c index 327e83a..6181470
> 100644
> --- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
> +++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
> @@ -426,10 +426,10 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp,
> struct v4l2_buffer32 __user &up->timestamp.tv_usec))
> return -EFAULT;
>
> - if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
> - if (get_user(kp->length, &up->length))
> - return -EFAULT;
> + if (get_user(kp->length, &up->length))
> + return -EFAULT;
I'd move this to the first block of get_user() calls at the beginning of the
function.
>
> + if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
> num_planes = kp->length;
> if (num_planes == 0) {
> kp->m.planes = NULL;
> @@ -462,16 +462,14 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp,
> struct v4l2_buffer32 __user } else {
> switch (kp->memory) {
> case V4L2_MEMORY_MMAP:
> - if (get_user(kp->length, &up->length) ||
> - get_user(kp->m.offset, &up->m.offset))
> + if (get_user(kp->m.offset, &up->m.offset))
> return -EFAULT;
> break;
> case V4L2_MEMORY_USERPTR:
> {
> compat_long_t tmp;
>
> - if (get_user(kp->length, &up->length) ||
> - get_user(tmp, &up->m.userptr))
> + if (get_user(tmp, &up->m.userptr))
> return -EFAULT;
>
> kp->m.userptr = (unsigned long)compat_ptr(tmp);
> @@ -516,6 +514,9 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp,
> struct v4l2_buffer32 __user put_user(kp->reserved, &up->reserved))
> return -EFAULT;
>
> + if (put_user(kp->length, &up->length))
> + return -EFAULT;
Same here.
> if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
> num_planes = kp->length;
> if (num_planes == 0)
> @@ -536,13 +537,11 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp,
> struct v4l2_buffer32 __user } else {
> switch (kp->memory) {
> case V4L2_MEMORY_MMAP:
> - if (put_user(kp->length, &up->length) ||
> - put_user(kp->m.offset, &up->m.offset))
> + if (put_user(kp->m.offset, &up->m.offset))
> return -EFAULT;
> break;
> case V4L2_MEMORY_USERPTR:
> - if (put_user(kp->length, &up->length) ||
> - put_user(kp->m.userptr, &up->m.userptr))
> + if (put_user(kp->m.userptr, &up->m.userptr))
> return -EFAULT;
> break;
> case V4L2_MEMORY_OVERLAY:
--
Regards,
Laurent Pinchart
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