Merge pull request #4549 from liubin/fix/4419-set-status-if-wait-process-failed

shim: set a non-zero return code if the wait process call failed.

src/runtime/pkg/containerd-shim-v2/wait.go

@@ -53,6 +53,11 @@ func wait(ctx context.Context, s *service, c *container, execID string) (int32,
 			"container": c.id,
 			"pid":       processID,
 		}).Error("Wait for process failed")
+
+		// set return code if wait failed
+		if ret == 0 {
+			ret = exitCode255
+		}
 	}
 
 	timeStamp := time.Now()