Commit 9c52f495 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu/mmhub4.2.0: add bounds checking for cid 



The value should never exceed the array size as those
are the only values the hardware is expected to return,
but add checks anyway.

Reviewed-by: default avatarBenjamin Cheng <benjamin.cheng@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
(cherry picked from commit dea5f235)
Cc: stable@vger.kernel.org
parent 3cdd4058

drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c

+2 −1
Original line number Diff line number Diff line
@@ -688,7 +688,8 @@ mmhub_v4_2_0_print_l2_protection_fault_status(struct amdgpu_device *adev, 
		status);

	switch (amdgpu_ip_version(adev, MMHUB_HWIP, 0)) {

	case IP_VERSION(4, 2, 0):

		mmhub_cid = mmhub_client_ids_v4_2_0[cid][rw];

		mmhub_cid = cid < ARRAY_SIZE(mmhub_client_ids_v4_2_0) ?

			mmhub_client_ids_v4_2_0[cid][rw] : NULL;

		break;

	default:

		mmhub_cid = NULL;