layers: Add VUID 06561, 06562

Check for valid descriptor set layout handles at CreatePipelineLayout
time.

layers/parameter_validation_utils.cpp

@@ -1604,6 +1604,20 @@ bool StatelessValidation::manual_PreCallValidateCreatePipelineLayout(VkDevice de
                          pCreateInfo->setLayoutCount, device_limits.maxBoundDescriptorSets);
     }
 
+    const bool has_independent_sets = (pCreateInfo->flags & VK_PIPELINE_LAYOUT_CREATE_INDEPENDENT_SETS_BIT_EXT) != 0;
+    const bool graphics_pipeline_library = IsExtEnabled(device_extensions.vk_ext_graphics_pipeline_library);
+    const char *const valid_dsl_vuid = (!graphics_pipeline_library)
+                                           ? "VUID-VkPipelineLayoutCreateInfo-pSetLayouts-06561"
+                                           : ((!has_independent_sets) ? "VUID-VkPipelineLayoutCreateInfo-flags-06562" : nullptr);
+    if (valid_dsl_vuid) {
+        for (uint32_t i = 0; i < pCreateInfo->setLayoutCount; ++i) {
+            if (!pCreateInfo->pSetLayouts[i]) {
+                skip |=
+                    LogError(device, valid_dsl_vuid, "vkCreatePipelineLayout(): pSetLayouts[%" PRIu32 "] is VK_NULL_HANDLE.", i);
+            }
+        }
+    }
+
     // Validate Push Constant ranges
     for (uint32_t i = 0; i < pCreateInfo->pushConstantRangeCount; ++i) {
         const uint32_t offset = pCreateInfo->pPushConstantRanges[i].offset;