Don't call into AttributeAccessInterface for attributes that don't ex…

…ist.

In particular, writes already had this check, but we need it for reads.

Fixes project-chip#10389

src/app/tests/suites/TestCluster.yaml

@@ -2033,3 +2033,10 @@ tests:
       attribute: "nullable_char_string"
       response:
           value: ""
+
+    - label: "Read nonexistent attribute."
+      endpoint: 200
+      command: "readAttribute"
+      attribute: "list_int8u"
+      response:
+          error: 1

src/app/util/ember-compatibility-functions.cpp

@@ -210,6 +210,28 @@ bool ServerClusterCommandExists(const ConcreteCommandPath & aCommandPath)
     return emberAfContainsServer(aCommandPath.mEndpointId, aCommandPath.mClusterId);
 }
 
+namespace {
+CHIP_ERROR SendFailureStatus(const ConcreteAttributePath & aPath, AttributeReportIB::Builder & aAttributeReport,
+                             Protocols::InteractionModel::Status aStatus, const TLV::TLVWriter & aReportCheckpoint)
+{
+    aAttributeReport.Rollback(aReportCheckpoint);
+    AttributeStatusIB::Builder attributeStatusIBBuilder = aAttributeReport.CreateAttributeStatus();
+    AttributePathIB::Builder attributePathIBBuilder     = attributeStatusIBBuilder.CreatePath();
+    attributePathIBBuilder.Endpoint(aPath.mEndpointId)
+        .Cluster(aPath.mClusterId)
+        .Attribute(aPath.mAttributeId)
+        .EndOfAttributePathIB();
+    ReturnErrorOnFailure(attributePathIBBuilder.GetError());
+    StatusIB::Builder statusIBBuilder = attributeStatusIBBuilder.CreateErrorStatus();
+    statusIBBuilder.EncodeStatusIB(StatusIB(aStatus));
+    ReturnErrorOnFailure(statusIBBuilder.GetError());
+    attributeStatusIBBuilder.EndOfAttributeStatusIB();
+    ReturnErrorOnFailure(attributeStatusIBBuilder.GetError());
+    return CHIP_NO_ERROR;
+}
+
+} // anonymous namespace
+
 CHIP_ERROR ReadSingleClusterData(FabricIndex aAccessingFabricIndex, const ConcreteReadAttributePath & aPath,
                                  AttributeReportIB::Builder & aAttributeReport)
 {
@@ -234,6 +256,16 @@ CHIP_ERROR ReadSingleClusterData(FabricIndex aAccessingFabricIndex, const Concre
     AttributeAccessInterface * attrOverride = findAttributeAccessOverride(aPath.mEndpointId, aPath.mClusterId);
     if (attrOverride != nullptr)
     {
+        const EmberAfAttributeMetadata * attributeMetadata =
+            emberAfLocateAttributeMetadata(aPath.mEndpointId, aPath.mClusterId, aPath.mAttributeId, CLUSTER_MASK_SERVER, 0);
+
+        if (attributeMetadata == nullptr)
+        {
+            // This attribute (or even this cluster) is not actually supported
+            // on this endpoint.
+            return SendFailureStatus(aPath, aAttributeReport, Protocols::InteractionModel::Status::UnsupportedAttribute, backup);
+        }
+
         // TODO: We should probably clone the writer and convert failures here
         // into status responses, unless our caller already does that.
         writer = attributeDataIBBuilder.GetWriter();
@@ -433,19 +465,7 @@ CHIP_ERROR ReadSingleClusterData(FabricIndex aAccessingFabricIndex, const Concre
     }
     else
     {
-        aAttributeReport.Rollback(backup);
-        attributeStatusIBBuilder = aAttributeReport.CreateAttributeStatus();
-        attributePathIBBuilder   = attributeStatusIBBuilder.CreatePath();
-        attributePathIBBuilder.Endpoint(aPath.mEndpointId)
-            .Cluster(aPath.mClusterId)
-            .Attribute(aPath.mAttributeId)
-            .EndOfAttributePathIB();
-        ReturnErrorOnFailure(attributePathIBBuilder.GetError());
-        StatusIB::Builder statusIBBuilder = attributeStatusIBBuilder.CreateErrorStatus();
-        statusIBBuilder.EncodeStatusIB(StatusIB(imStatus));
-        ReturnErrorOnFailure(statusIBBuilder.GetError());
-        attributeStatusIBBuilder.EndOfAttributeStatusIB();
-        ReturnErrorOnFailure(attributeStatusIBBuilder.GetError());
+        ReturnErrorOnFailure(SendFailureStatus(aPath, aAttributeReport, imStatus, backup));
     }
     return CHIP_NO_ERROR;
 }

src/app/zap-templates/common/ClusterTestGeneration.js

@@ -199,6 +199,7 @@ function setDefaultResponse(test)
   setDefault(test[kResponseName], kConstraintsName, defaultResponseConstraints);
 
   const hasResponseValue              = 'value' in test[kResponseName];
+  const hasResponseError              = 'error' in test[kResponseName];
   const hasResponseConstraints        = 'constraints' in test[kResponseName] && Object.keys(test[kResponseName].constraints).length;
   const hasResponseValueOrConstraints = hasResponseValue || hasResponseConstraints;
 
@@ -233,10 +234,10 @@ function setDefaultResponse(test)
     return;
   }
 
-  if (!hasResponseValueOrConstraints) {
+  if (!hasResponseValueOrConstraints && !hasResponseError) {
     console.log(test);
     console.log(test[kResponseName]);
-    const errorStr = 'Test does not have a "value" or a "constraints" defined.';
+    const errorStr = 'Test does not have a "value" or a "constraints" defined and is not expecting an error.';
     throwError(test, errorStr);
   }