daemon: allow tmpfs to trump over VOLUME(s)

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

integration-cli/docker_cli_run_unix_test.go

@@ -829,6 +829,23 @@ func (s *DockerSuite) TestRunTmpfsMounts(c *check.C) {
 	}
 }
 
+func (s *DockerSuite) TestRunTmpfsMountsOverrideImageVolumes(c *check.C) {
+	name := "img-with-volumes"
+	_, err := buildImage(
+		name,
+		`
+    FROM busybox
+    VOLUME /run
+    RUN touch /run/stuff
+    `,
+		true)
+	if err != nil {
+		c.Fatal(err)
+	}
+	out, _ := dockerCmd(c, "run", "--tmpfs", "/run", name, "ls", "/run")
+	c.Assert(out, checker.Not(checker.Contains), "stuff")
+}
+
 // Test case for #22420
 func (s *DockerSuite) TestRunTmpfsMountsWithOptions(c *check.C) {
 	testRequires(c, DaemonIsLinux)