[why]
Prevent index-out-of-bounds due to requiring cursor overlay when
plane_count is MAX_SURFACES.
[how]
Bounds check on plane_count when requiring overlay cursor.
Co-developed-by: Melissa Wen <mwen@xxxxxxxxxx>
Signed-off-by: Zaeem Mohamed <zaeem.mohamed@xxxxxxx>
---
amdgpu_dm/amdgpu_dm.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/amdgpu_dm/amdgpu_dm.c b/amdgpu_dm/amdgpu_dm.c
index 97e0a1bbba..964497c613 100644
--- a/amdgpu_dm/amdgpu_dm.c
+++ b/amdgpu_dm/amdgpu_dm.c
@@ -11821,8 +11821,16 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
/* Overlay cusor not subject to native cursor restrictions */
dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
- if (dm_new_crtc_state->cursor_mode == DM_CURSOR_OVERLAY_MODE)
+ if (dm_new_crtc_state->cursor_mode == DM_CURSOR_OVERLAY_MODE) {
+ if (dc->current_state->stream_status->plane_count > MAX_SURFACES) {
+ drm_dbg_driver(crtc->dev,
+ "Can't enable cursor plane with %d planes\n", MAX_SURFACES);
+ ret = -EINVAL;
+ goto fail;
+ }
+
continue;
+ }
/* Check if rotation or scaling is enabled on DCN401 */
if ((drm_plane_mask(crtc->cursor) & new_crtc_state->plane_mask) &&
--
2.34.1
