1 files changed, 6 insertions, 0 deletions
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index 799dfc856..01e4da397 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -3512,6 +3512,12 @@ ngx_http_core_server_name(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
         ngx_str_t  err;
         u_char     errstr[NGX_MAX_CONF_ERRSTR];
 
+        if (value[i].len == 1) {
+            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                               "empty regex in server name \"%V\"", &value[i]);
+            return NGX_CONF_ERROR;
+        }
+
         err.len = NGX_MAX_CONF_ERRSTR;
         err.data = errstr;