GP-0: Guard the buffer truncation with Reason.EXECUTE_DECODE

Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/exec/BytesPcodeExecutorStateSpace.java

@@ -185,6 +185,11 @@ public class BytesPcodeExecutorStateSpace<B> {
 			}
 		}
 
+		/**
+		 * The decoder will buffer ahead, so give it as much as we can, but no more than is actually
+		 * initialized. If it's a (non-decode) read, give it everything, but invoke the warning.
+		 */
+		if (reason == Reason.EXECUTE_DECODE) {
 			Iterator<ULongSpan> it =
 				uninitialized.complement(ULongSpan.extent(offset, size)).iterator();
 			if (it.hasNext()) {
@@ -193,6 +198,7 @@ public class BytesPcodeExecutorStateSpace<B> {
 					return readBytes(offset, (int) init.length(), reason);
 				}
 			}
+		}
 
 		if (reason == Reason.EXECUTE_READ) {
 			warnUninit(uninitialized);