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drm/amdgpu/mmhub2.0: 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 e064cef4b53552602bb6ac90399c18f662f3cacd)
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher
2026-03-04 17:22:43 -05:00
parent 39f44f54af
commit 0b26edac4a
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c
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@@ -154,14 +154,17 @@ mmhub_v2_0_print_l2_protection_fault_status(struct amdgpu_device *adev,
switch (amdgpu_ip_version(adev, MMHUB_HWIP, 0)) {
case IP_VERSION(2, 0, 0):
case IP_VERSION(2, 0, 2):
mmhub_cid = mmhub_client_ids_navi1x[cid][rw];
mmhub_cid = cid < ARRAY_SIZE(mmhub_client_ids_navi1x) ?
mmhub_client_ids_navi1x[cid][rw] : NULL;
break;
case IP_VERSION(2, 1, 0):
case IP_VERSION(2, 1, 1):
mmhub_cid = mmhub_client_ids_sienna_cichlid[cid][rw];
mmhub_cid = cid < ARRAY_SIZE(mmhub_client_ids_sienna_cichlid) ?
mmhub_client_ids_sienna_cichlid[cid][rw] : NULL;
break;
case IP_VERSION(2, 1, 2):
mmhub_cid = mmhub_client_ids_beige_goby[cid][rw];
mmhub_cid = cid < ARRAY_SIZE(mmhub_client_ids_beige_goby) ?
mmhub_client_ids_beige_goby[cid][rw] : NULL;
break;
default:
mmhub_cid = NULL;