diff mbox series

[5.10,074/289] drm/amd/display: add handling for hdcp2 rx id list validation

Message ID 20210517140307.681809258@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH May 17, 2021, 1:59 p.m. UTC 
From: Dingchen (David) Zhang <dingchen.zhang@amd.com>

[ Upstream commit 4ccf9446b2a3615615045346c97f8a1e2a16568a ]

[why]
the current implementation of hdcp2 rx id list validation does not
have handler/checker for invalid message status, e.g. HMAC, the V
parameter calculated from PSP not matching the V prime from Rx.

[how]
return a generic FAILURE for any message status not SUCCESS or
REVOKED.

Signed-off-by: Dingchen (David) Zhang <dingchen.zhang@amd.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
index 3a367a5968ae..972f2600f967 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
@@ -789,6 +789,8 @@  enum mod_hdcp_status mod_hdcp_hdcp2_validate_rx_id_list(struct mod_hdcp *hdcp)
 			   TA_HDCP2_MSG_AUTHENTICATION_STATUS__RECEIVERID_REVOKED) {
 			hdcp->connection.is_hdcp2_revoked = 1;
 			status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_REVOKED;
+		} else {
+			status = MOD_HDCP_STATUS_HDCP2_VALIDATE_RX_ID_LIST_FAILURE;
 		}
 	}
 	mutex_unlock(&psp->hdcp_context.mutex);