From 268f2efb480d99cef61bf13330f3a422b41ac932 Mon Sep 17 00:00:00 2001
From: John Sully <john@csquare.ca>
Date: Mon, 11 May 2020 01:02:58 -0400
Subject: [PATCH] Fix crash during RDB save with module events

Former-commit-id: 0f7eac411eccb853d7e50152e2bbd1ee28e6ee53
---
 src/module.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/module.cpp b/src/module.cpp
index 1f07a0e9b..682dc1830 100644
--- a/src/module.cpp
+++ b/src/module.cpp
@@ -7222,6 +7222,8 @@ void moduleFireServerEvent(uint64_t eid, int subid, void *data) {
      * cheap if there are no registered modules. */
     if (listLength(RedisModule_EventListeners) == 0) return;
 
+    aeAcquireLock();
+
     listIter li;
     listNode *ln;
     listRewind(RedisModule_EventListeners,&li);
@@ -7286,6 +7288,8 @@ void moduleFireServerEvent(uint64_t eid, int subid, void *data) {
             moduleFreeContext(&ctx);
         }
     }
+
+    aeReleaseLock();
 }
 
 /* Remove all the listeners for this module: this is used before unloading