From 54c4b09f87d6069735eb62d436fc596ee2966d81 Mon Sep 17 00:00:00 2001
From: Conner Fromknecht <conner@lightning.engineering>
Date: Mon, 30 Jul 2018 18:30:19 -0700
Subject: [PATCH] discovery/gossiper: copy bolt key to prevent panic

Corrects an instance that holds a reference to a boltdb
byte slice after returning from the transaction. This
can cause panics under certain conditions, which is
avoided by creating a copy of the key.
---
 discovery/gossiper.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/discovery/gossiper.go b/discovery/gossiper.go
index a7b70ba5..dd94f58a 100644
--- a/discovery/gossiper.go
+++ b/discovery/gossiper.go
@@ -796,7 +796,13 @@ func (d *AuthenticatedGossiper) resendAnnounceSignatures() error {
 			if err != nil {
 				return err
 			}
-			t := msgTuple{peer, msg, k}
+
+			// Make a copy of the database key corresponding to
+			// these AnnounceSignatures.
+			dbKey := make([]byte, len(k))
+			copy(dbKey, k)
+
+			t := msgTuple{peer, msg, dbKey}
 
 			// Add the message to the slice, such that we can
 			// resend it after the database transaction is over.