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

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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: Benjamin Cheng <benjamin.cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit dea5f235baf3786bfd4fd920b03c19285fdc3d9f)
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher
2026-03-04 17:26:17 -05:00
parent 3cdd405831
commit 9c52f49545
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c
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@@ -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;