1 files changed, 10 insertions, 6 deletions

diff --git a/src/core/ngx_connection.c b/src/core/ngx_connection.c
index 88fefcea2..ba07c63e8 100644
--- a/src/core/ngx_connection.c
+++ b/src/core/ngx_connection.c
@@ -1034,6 +1034,10 @@ ngx_close_listening_sockets(ngx_cycle_t *cycle)
     ls = cycle->listening.elts;
     for (i = 0; i < cycle->listening.nelts; i++) {
 
+        if (ls[i].quic) {
+            continue;
+        }
+
         c = ls[i].connection;
 
         if (c) {
@@ -1179,11 +1183,6 @@ ngx_close_connection(ngx_connection_t *c)
     ngx_uint_t    log_error, level;
     ngx_socket_t  fd;
 
-    if (c->fd == (ngx_socket_t) -1) {
-        ngx_log_error(NGX_LOG_ALERT, c->log, 0, "connection already closed");
-        return;
-    }
-
     if (c->read->timer_set) {
         ngx_del_timer(c->read);
     }
@@ -1192,7 +1191,7 @@ ngx_close_connection(ngx_connection_t *c)
         ngx_del_timer(c->write);
     }
 
-    if (!c->shared) {
+    if (!c->shared && c->fd != (ngx_socket_t) -1) {
         if (ngx_del_conn) {
             ngx_del_conn(c, NGX_CLOSE_EVENT);
 
@@ -1224,6 +1223,11 @@ ngx_close_connection(ngx_connection_t *c)
 
     ngx_free_connection(c);
 
+    if (c->fd == (ngx_socket_t) -1) {
+        ngx_log_debug0(NGX_LOG_DEBUG_CORE, c->log, 0, "connection has no fd");
+        return;
+    }
+
     fd = c->fd;
     c->fd = (ngx_socket_t) -1;