Fix UB bug in extensions/cl_khr_command_buffer/command_buffer_event_s…

…ync.cpp

RunCombufWaitForSecQueueCombuf() is launching two clEnqueueFillBuffer commands
on two separate queues, however both had the same buffer argument, and there
was no synchronization between the commands. Fixed the test to use separate
buffers for the two command queues.

test_conformance/extensions/cl_khr_command_buffer/command_buffer_event_sync.cpp

@@ -108,6 +108,7 @@ struct CommandBufferEventSync : public BasicCommandBufferTest
         // due to possible out-of-order command queue it is necessary to create
         // separate set of kernel args for below cases
         if (event_mode == EventMode::RET_COMBUF_WAIT_FOR_SEC_COMBUF
+            || event_mode == EventMode::RET_WAIT_FOR_SEC_QUEUE_EVENT
             || event_mode == EventMode::RET_CLWAITFOREVENTS)
         {
             // setup arguments for secondary kernel
@@ -570,12 +571,12 @@ struct CommandBufferEventSync : public BasicCommandBufferTest
         test_error(error, "clCreateCommandBufferKHR failed");
 
         // record secondary command buffer
-        error = RecordCommandBuffer(command_buffer_sec, kernel);
+        error = RecordCommandBuffer(command_buffer_sec, kernel_sec);
         test_error(error, "RecordCommandBuffer failed");
 
         // process secondary queue
         error =
-            clEnqueueFillBuffer(queue_sec, in_mem, &pattern_pri, sizeof(cl_int),
+            clEnqueueFillBuffer(queue_sec, in_mem_sec, &pattern_pri, sizeof(cl_int),
                                 0, data_size(), 0, nullptr, nullptr);
         test_error(error, "clEnqueueFillBuffer failed");