From b30109df3c7c56cb0d1752fc03f478474c3c190a Mon Sep 17 00:00:00 2001
From: gluk256 <gluk256@gmail.com>
Date: Wed, 13 Feb 2019 03:12:41 +0400
Subject: [PATCH] swarm/pss: mutex lifecycle fixed (#19045)

---
 swarm/pss/protocol.go | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/swarm/pss/protocol.go b/swarm/pss/protocol.go
index 5fcae090e..5f47ee47d 100644
--- a/swarm/pss/protocol.go
+++ b/swarm/pss/protocol.go
@@ -228,6 +228,7 @@ func ToP2pMsg(msg []byte) (p2p.Msg, error) {
 // to link the peer to.
 // The key must exist in the pss store prior to adding the peer.
 func (p *Protocol) AddPeer(peer *p2p.Peer, topic Topic, asymmetric bool, key string) (p2p.MsgReadWriter, error) {
+	var ok bool
 	rw := &PssReadWriter{
 		Pss:   p.Pss,
 		rw:    make(chan p2p.Msg),
@@ -242,19 +243,21 @@ func (p *Protocol) AddPeer(peer *p2p.Peer, topic Topic, asymmetric bool, key str
 	}
 	if asymmetric {
 		p.Pss.pubKeyPoolMu.Lock()
-		if _, ok := p.Pss.pubKeyPool[key]; !ok {
+		_, ok = p.Pss.pubKeyPool[key]
+		p.Pss.pubKeyPoolMu.Unlock()
+		if !ok {
 			return nil, fmt.Errorf("asym key does not exist: %s", key)
 		}
-		p.Pss.pubKeyPoolMu.Unlock()
 		p.RWPoolMu.Lock()
 		p.pubKeyRWPool[key] = rw
 		p.RWPoolMu.Unlock()
 	} else {
 		p.Pss.symKeyPoolMu.Lock()
-		if _, ok := p.Pss.symKeyPool[key]; !ok {
+		_, ok = p.Pss.symKeyPool[key]
+		p.Pss.symKeyPoolMu.Unlock()
+		if !ok {
 			return nil, fmt.Errorf("symkey does not exist: %s", key)
 		}
-		p.Pss.symKeyPoolMu.Unlock()
 		p.RWPoolMu.Lock()
 		p.symKeyRWPool[key] = rw
 		p.RWPoolMu.Unlock()