From 486f01353905629a1d03b4231e7062e13d80804d Mon Sep 17 00:00:00 2001
From: Steven Allen <steven@stebalien.com>
Date: Thu, 6 Jun 2019 15:42:03 -0700
Subject: [PATCH] pin: fix concurrent map access race

Not sure why this didn't show up sooner.

fixes #6418
---
 pin/pin.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pin/pin.go b/pin/pin.go
index 8df21ee1ce3..48a16f84e5e 100644
--- a/pin/pin.go
+++ b/pin/pin.go
@@ -498,11 +498,17 @@ func LoadPinner(d ds.Datastore, dserv, internal ipld.DAGService) (Pinner, error)
 
 // DirectKeys returns a slice containing the directly pinned keys
 func (p *pinner) DirectKeys() []cid.Cid {
+	p.lock.RLock()
+	defer p.lock.RUnlock()
+
 	return p.directPin.Keys()
 }
 
 // RecursiveKeys returns a slice containing the recursively pinned keys
 func (p *pinner) RecursiveKeys() []cid.Cid {
+	p.lock.RLock()
+	defer p.lock.RUnlock()
+
 	return p.recursePin.Keys()
 }