On Wednesday, 20 June 2018 16:03:58 MSK Mikko Perttunen wrote:
> Here we are checking for the buffer length, not an offset for writing
> to, so using > is correct. The current code incorrectly rejects a
> command buffer ending at the memory buffer's end.
>
> Signed-off-by: Mikko Perttunen <mperttunen@xxxxxxxxxx>
> ---
> drivers/gpu/drm/tegra/drm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
> index 776c1513e582..a2bd5876c633 100644
> --- a/drivers/gpu/drm/tegra/drm.c
> +++ b/drivers/gpu/drm/tegra/drm.c
> @@ -398,7 +398,7 @@ int tegra_drm_submit(struct tegra_drm_context *context,
> * unaligned offset is malformed and cause commands stream
> * corruption on the buffer address relocation.
> */
> - if (offset & 3 || offset >= obj->gem.size) {
> + if (offset & 3 || offset > obj->gem.size) {
> err = -EINVAL;
> goto fail;
> }
Reviewed-by: Dmitry Osipenko <digetx@xxxxxxxxx>
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