From a69ffb5953f3058cb109adcb88f49a42edece5f6 Mon Sep 17 00:00:00 2001
From: Yahor Yuzefovich <yahor@cockroachlabs.com>
Date: Mon, 28 Nov 2022 11:31:01 -0800
Subject: [PATCH] config: acquire write lock when overwriting the map

Previously, by mistake we were acquiring a read lock even though we do
write operations in `PurgeZoneConfigCache`.

Release note: None
---
 pkg/config/system.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkg/config/system.go b/pkg/config/system.go
index 29e256ca9b30..0fc410029746 100644
--- a/pkg/config/system.go
+++ b/pkg/config/system.go
@@ -408,8 +408,8 @@ func (s *SystemConfig) GetZoneConfigForObject(
 // requested. Note, this function is only intended to be called during test
 // execution, such as logic tests.
 func (s *SystemConfig) PurgeZoneConfigCache() {
-	s.mu.RLock()
-	defer s.mu.RUnlock()
+	s.mu.Lock()
+	defer s.mu.Unlock()
 	if len(s.mu.zoneCache) != 0 {
 		s.mu.zoneCache = map[ObjectID]zoneEntry{}
 	}