From: Wayne Lin wayne.lin@amd.com

[ Upstream commit ad28d7c3d989fc5689581664653879d664da76f0 ]

[Why & How] It actually exposes '6' types in enum dmub_notification_type. Not 5. Using smaller number to create array dmub_callback & dmub_thread_offload has potential to access item out of array bound. Fix it.

Reviewed-by: Jerry Zuo jerry.zuo@amd.com Acked-by: Zaeem Mohamed zaeem.mohamed@amd.com Signed-off-by: Wayne Lin wayne.lin@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

Cherry-pick from 9f404b0bc2df3880758fb3c3bc7496f596f347d7 CVE-2024-46871

Signed-off-by: Guocai He guocai.he.cn@windriver.com --- This commit is backporting 9f404b0bc2df3880758fb3c3bc7496f596f347d7 to the branch linux-5.15.y to solve the CVE-2024-46871. Please merge this commit to linux-5.15.y.

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h index f9c3e5a41713..3102ade85b55 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -48,7 +48,7 @@

#define AMDGPU_DM_MAX_NUM_EDP 2

-#define AMDGPU_DMUB_NOTIFICATION_MAX 5 +#define AMDGPU_DMUB_NOTIFICATION_MAX 6 /* #include "include/amdgpu_dal_power_if.h" #include "amdgpu_dm_irq.h"