From 9c52f49545478aa47769378cd0b53c5005d6a846 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 4 Mar 2026 17:26:17 -0500 Subject: [PATCH] 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: Benjamin Cheng Signed-off-by: Alex Deucher (cherry picked from commit dea5f235baf3786bfd4fd920b03c19285fdc3d9f) Cc: stable@vger.kernel.org --- drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c index a72770e3d0e9..2532ca80f735 100644 --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c @@ -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;