loolwsd: alertAllUsersOfDocument must be called while holding lock

Change-Id: I266a61402973c9418eb293d2f66601d00be76754
Reviewed-on: https://gerrit.libreoffice.org/30675
Reviewed-by: Ashod Nakashian <ashnakash@gmail.com>
Tested-by: Ashod Nakashian <ashnakash@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/loolwsd/LOOLWSD.cpp b/loolwsd/LOOLWSD.cpp
index 6334a2cb3..39a32391c 100644
--- a/loolwsd/LOOLWSD.cpp
+++ b/loolwsd/LOOLWSD.cpp
@@ -2123,6 +2123,7 @@ void alertAllUsers(const std::string& cmd, const std::string& kind)
 
     for (auto& brokerIt : DocBrokers)
     {
+        auto lock = brokerIt.second->getLock();
         brokerIt.second->alertAllUsersOfDocument(cmd, kind);
     }
 }