[p2p] Try to fix P2P memory issue (#3795)

* [p2p] Fix context leak in resolveMultiAddr

* [p2p] upgrade go-libp2p-kad-dht to v0.12.1

* [p2p] Upgrade entire libp2p stack

go.mod

@@ -30,12 +30,12 @@ require (
 	github.com/hashicorp/golang-lru v0.5.4
 	github.com/ipfs/go-ds-badger v0.2.4
 	github.com/json-iterator/go v1.1.10
-	github.com/libp2p/go-libp2p v0.14.0
+	github.com/libp2p/go-libp2p v0.14.2
 	github.com/libp2p/go-libp2p-core v0.8.5
 	github.com/libp2p/go-libp2p-crypto v0.1.0
 	github.com/libp2p/go-libp2p-discovery v0.5.0
-	github.com/libp2p/go-libp2p-kad-dht v0.11.1
-	github.com/libp2p/go-libp2p-pubsub v0.4.0
+	github.com/libp2p/go-libp2p-kad-dht v0.12.1
+	github.com/libp2p/go-libp2p-pubsub v0.4.1
 	github.com/multiformats/go-multiaddr v0.3.1
 	github.com/multiformats/go-multiaddr-dns v0.3.1
 	github.com/natefinch/lumberjack v2.0.0+incompatible

p2p/types/peerAddr.go

@@ -86,7 +86,8 @@ func resolveMultiAddrString(addrStr string) ([]libp2p_peer.AddrInfo, error) {
 
 func resolveMultiAddr(raw ma.Multiaddr) ([]ma.Multiaddr, error) {
 	if madns.Matches(raw) {
-		ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
+		ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+		defer cancel()
 		mas, err := madns.Resolve(ctx, raw)
 		if err != nil {
 			return nil, err