diff mbox

[V2] drm/amdgpu: avoid out of bounds access on array interrupt_status_offsets

Message ID 20160920154931.22801-1-colin.king@canonical.com (mailing list archive)
State New, archived
Headers show

Commit Message

Colin King Sept. 20, 2016, 3:49 p.m. UTC
From: Colin Ian King <colin.king@canonical.com>

The check for an out of bound index into array interrupt_status_offsets
is off-by-one. Fix this and also don't compared to a hard coded array
size but use adev->mode_info.num_hpd instead.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Alex Deucher Sept. 20, 2016, 3:51 p.m. UTC | #1
On Tue, Sep 20, 2016 at 11:49 AM, Colin King <colin.king@canonical.com> wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> The check for an out of bound index into array interrupt_status_offsets
> is off-by-one. Fix this and also don't compared to a hard coded array
> size but use adev->mode_info.num_hpd instead.
>
> Signed-off-by: Colin Ian King <colin.king@canonical.com>

Applied!  thanks,

Alex

> ---
>  drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
> index d3512f3..4ce4c1a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
> @@ -2782,7 +2782,7 @@ static int dce_v6_0_hpd_irq(struct amdgpu_device *adev,
>         uint32_t disp_int, mask, int_control, tmp;
>         unsigned hpd;
>
> -       if (entry->src_data > 6) {
> +       if (entry->src_data >= adev->mode_info.num_hpd) {
>                 DRM_DEBUG("Unhandled interrupt: %d %d\n", entry->src_id, entry->src_data);
>                 return 0;
>         }
> --
> 2.9.3
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
diff mbox

Patch

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
index d3512f3..4ce4c1a 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
@@ -2782,7 +2782,7 @@  static int dce_v6_0_hpd_irq(struct amdgpu_device *adev,
 	uint32_t disp_int, mask, int_control, tmp;
 	unsigned hpd;
 
-	if (entry->src_data > 6) {
+	if (entry->src_data >= adev->mode_info.num_hpd) {
 		DRM_DEBUG("Unhandled interrupt: %d %d\n", entry->src_id, entry->src_data);
 		return 0;
 	}