client: take lock in handle_conf_change

Fixes: #14365
Signed-off-by: John Spray <john.spray@redhat.com>

diff --git a/src/client/Client.cc b/src/client/Client.cc
index 5dc60c23d4c9c5f29f491ec4c90e1189f6c8cbe9..a4a01a80b3a68bcf42c3df5c9d920d06d2f26f07 100644 (file)
--- a/src/client/Client.cc
+++ b/src/client/Client.cc
@@ -12233,6 +12233,8 @@ const char** Client::get_tracked_conf_keys() const
 void Client::handle_conf_change(const struct md_config_t *conf,
                                const std::set <std::string> &changed)
 {
+  Mutex::Locker lock(client_lock);
+
   if (changed.count("client_cache_size") ||
       changed.count("client_cache_mid")) {
     lru.lru_set_max(cct->_conf->client_cache_size);