1 files changed, 2 insertions, 1 deletions
diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc
index 794d20af2f2..4b90209a472 100644
--- a/sql/sql_acl.cc
+++ b/sql/sql_acl.cc
@@ -12132,12 +12132,13 @@ bool acl_authenticate(THD *thd, uint com_change_user_pkt_len)
                                      mpvio.auth_info.authenticated_as);
       if (!acl_proxy_user)
       {
+        mysql_mutex_unlock(&acl_cache->lock);
+
         Host_errors errors;
         errors.m_proxy_user_acl= 1;
         inc_host_errors(mpvio.thd->security_ctx->ip, &errors);
         if (!thd->is_error())
           login_failed_error(thd);
-        mysql_mutex_unlock(&acl_cache->lock);
         DBUG_RETURN(1);
       }
       acl_user= acl_proxy_user->copy(thd->mem_root);