From 7005d07fa80a9399a6d8b195c283e6dbaf79f564 Mon Sep 17 00:00:00 2001
From: Jeff Zvier <zvier20@gmail.com>
Date: Tue, 18 Aug 2020 20:23:49 +0800
Subject: [PATCH] recover use graphLock when mount a layer

Signed-off-by: Jeff Zvier <zvier20@gmail.com>
---
 store.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/store.go b/store.go
index 937bf8c3a6..2a34c84ccc 100644
--- a/store.go
+++ b/store.go
@@ -2630,6 +2630,9 @@ func (s *store) mount(id string, options drivers.MountOpts) (string, error) {
 	if err != nil {
 		return "", err
 	}
+
+	s.graphLock.Lock()
+	defer s.graphLock.Unlock()
 	rlstore.Lock()
 	defer rlstore.Unlock()
 	if modified, err := rlstore.Modified(); modified || err != nil {