[AMD Official Use Only - General]
Can we just add cid 0x140 "UMSCH" to mmhub_client_ids_v3_3 structure ?
-----Original Message-----
From: Yu, Lang <Lang.Yu@xxxxxxx>
Sent: Thursday, March 7, 2024 10:49 AM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Zhang, Yifan <Yifan1.Zhang@xxxxxxx>; Yu, Lang <Lang.Yu@xxxxxxx>
Subject: [PATCH] drm/amdgpu: fix mmhub client id out-of-bounds access
Fixes: aba2be41470a ("drm/amdgpu: add mmhub 3.3.0 support")
Signed-off-by: Lang Yu <Lang.Yu@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/mmhub_v3_3.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v3_3.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v3_3.c
index b3961968c10c..238ea40c2450 100644
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v3_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v3_3.c
@@ -99,16 +99,15 @@ mmhub_v3_3_print_l2_protection_fault_status(struct amdgpu_device *adev,
switch (amdgpu_ip_version(adev, MMHUB_HWIP, 0)) {
case IP_VERSION(3, 3, 0):
case IP_VERSION(3, 3, 1):
- mmhub_cid = mmhub_client_ids_v3_3[cid][rw];
+ mmhub_cid = cid < ARRAY_SIZE(mmhub_client_ids_v3_3) ?
+ mmhub_client_ids_v3_3[cid][rw] :
+ cid == 0x140 ? "UMSCH" : NULL;
break;
default:
mmhub_cid = NULL;
break;
}
- if (!mmhub_cid && cid == 0x140)
- mmhub_cid = "UMSCH";
-
dev_err(adev->dev, "\t Faulty UTCL2 client ID: %s (0x%x)\n",
mmhub_cid ? mmhub_cid : "unknown", cid);
dev_err(adev->dev, "\t MORE_FAULTS: 0x%lx\n",
--
2.25.1
