From 75effb4f356a12304ca56707e54eef3328d5f807 Mon Sep 17 00:00:00 2001
From: sproxet <me@sproxet.dev>
Date: Sun, 31 Jul 2022 16:41:03 +0700
Subject: [PATCH] Fix UB in CDKGSessionHandler::SleepBeforePhase.

---
 src/llmq/quorums_dkgsessionhandler.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/llmq/quorums_dkgsessionhandler.cpp b/src/llmq/quorums_dkgsessionhandler.cpp
index e472ac5de0..fe3bde4746 100644
--- a/src/llmq/quorums_dkgsessionhandler.cpp
+++ b/src/llmq/quorums_dkgsessionhandler.cpp
@@ -238,7 +238,8 @@ void CDKGSessionHandler::SleepBeforePhase(QuorumPhase curPhase,
         phaseTime = 0;
     }
 
-    int64_t sleepTime = (int64_t)(phaseTime * curSession->GetMyMemberIndex());
+    int64_t sleepTime = 0;
+    if (curSession->GetMyMemberIndex() != UINT64_MAX) sleepTime = (int64_t)(phaseTime * curSession->GetMyMemberIndex());
     int64_t endTime = GetTimeMillis() + sleepTime;
     while (GetTimeMillis() < endTime) {
         if (stopRequested || ShutdownRequested()) {