graphdriver: Fix RefCounter memory leak

Signed-off-by: WANG Chao <chao.wang@ucloud.cn> Upstream-commit: 9015a05606a9bb80f0d8d2e3d43b0b682ca53db4 Component: engine
2018-02-09 10:26:06 +08:00
parent fd90b16ff5
commit f74751654b
1 changed files with 3 additions and 0 deletions
@@ -54,6 +54,9 @@ func (c *RefCounter) incdec(path string, infoOp func(minfo *minfo)) int {
 	}
 	infoOp(m)
 	count := m.count
+	if count <= 0 {
+		delete(c.counts, path)
+	}
 	c.mu.Unlock()
 	return count
 }