diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 764cd4950408..58dd8f29734e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -5064,6 +5064,13 @@ static void amdgpu_register_bad_pages_mca_notifier(struct amdgpu_device *adev)
 	 * Use this list instead of mgpu_info to find the amdgpu
 	 * device on which the UMC error was reported.
 	 */
+	if (mce_adev_list.num_gpu >= MAX_GPU_INSTANCE) {
+		dev_warn_ratelimited(adev->dev,
+			"mce_adev_list full, skip notifier registration (max=%d)\n",
+			MAX_GPU_INSTANCE);
+		return;
+	}
+
 	mce_adev_list.devs[mce_adev_list.num_gpu++] = adev;
 
 	/*