diff -u -r -p -Naur nginx-1.21.4/src/stream/ngx_stream.h nginx-1.21.4-patched/src/stream/ngx_stream.h
--- nginx-1.21.4/src/stream/ngx_stream.h	2021-11-04 21:27:55.288708527 +0800
+++ nginx-1.21.4-patched/src/stream/ngx_stream.h	2021-11-04 21:28:50.768035209 +0800
@@ -254,6 +254,15 @@ typedef struct {
 } ngx_stream_module_t;
 
 
+typedef struct {
+    ngx_msec_t                       connect_timeout;
+    ngx_msec_t                       timeout;
+} ngx_stream_proxy_ctx_t;
+
+
+#define NGX_STREAM_HAVE_PROXY_TIMEOUT_FIELDS_PATCH 1
+
+
 #define NGX_STREAM_MODULE       0x4d525453     /* "STRM" */
 
 #define NGX_STREAM_MAIN_CONF    0x02000000
@@ -307,6 +316,7 @@ void ngx_stream_finalize_session(ngx_str
 extern ngx_module_t  ngx_stream_module;
 extern ngx_uint_t    ngx_stream_max_module;
 extern ngx_module_t  ngx_stream_core_module;
+extern ngx_module_t  ngx_stream_proxy_module;
 
 
 typedef ngx_int_t (*ngx_stream_filter_pt)(ngx_stream_session_t *s,
diff -u -r -p -Naur nginx-1.21.4/src/stream/ngx_stream_proxy_module.c nginx-1.21.4-patched/src/stream/ngx_stream_proxy_module.c
--- nginx-1.21.4/src/stream/ngx_stream_proxy_module.c	2021-11-04 21:27:55.289708533 +0800
+++ nginx-1.21.4-patched/src/stream/ngx_stream_proxy_module.c	2021-11-04 21:37:03.578936990 +0800
@@ -400,6 +400,7 @@ ngx_stream_proxy_handler(ngx_stream_sess
     ngx_stream_proxy_srv_conf_t      *pscf;
     ngx_stream_upstream_srv_conf_t   *uscf, **uscfp;
     ngx_stream_upstream_main_conf_t  *umcf;
+    ngx_stream_proxy_ctx_t           *pctx;
 
     c = s->connection;
 
@@ -408,6 +409,17 @@ ngx_stream_proxy_handler(ngx_stream_sess
     ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0,
                    "proxy connection handler");
 
+    pctx = ngx_palloc(c->pool, sizeof(ngx_stream_proxy_ctx_t));
+    if (pctx == NULL) {
+        ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
+        return;
+    }
+
+    pctx->connect_timeout = pscf->connect_timeout;
+    pctx->timeout = pscf->timeout;
+
+    ngx_stream_set_ctx(s, pctx, ngx_stream_proxy_module);
+
     u = ngx_pcalloc(c->pool, sizeof(ngx_stream_upstream_t));
     if (u == NULL) {
         ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
@@ -699,6 +711,7 @@ ngx_stream_proxy_connect(ngx_stream_sess
     ngx_connection_t             *c, *pc;
     ngx_stream_upstream_t        *u;
     ngx_stream_proxy_srv_conf_t  *pscf;
+    ngx_stream_proxy_ctx_t       *ctx;
 
     c = s->connection;
 
@@ -706,6 +719,8 @@ ngx_stream_proxy_connect(ngx_stream_sess
 
     pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
 
+    ctx = ngx_stream_get_module_ctx(s, ngx_stream_proxy_module);
+
     u = s->upstream;
 
     u->connected = 0;
@@ -774,7 +789,7 @@ ngx_stream_proxy_connect(ngx_stream_sess
     pc->read->handler = ngx_stream_proxy_connect_handler;
     pc->write->handler = ngx_stream_proxy_connect_handler;
 
-    ngx_add_timer(pc->write, pscf->connect_timeout);
+    ngx_add_timer(pc->write, ctx->connect_timeout);
 }
 
 
@@ -948,8 +963,10 @@ ngx_stream_proxy_send_proxy_protocol(ngx
     ssize_t                       n, size;
     ngx_connection_t             *c, *pc;
     ngx_stream_upstream_t        *u;
-    ngx_stream_proxy_srv_conf_t  *pscf;
     u_char                        buf[NGX_PROXY_PROTOCOL_MAX_HEADER];
+    ngx_stream_proxy_ctx_t       *ctx;
+
+    ctx = ngx_stream_get_module_ctx(s, ngx_stream_proxy_module);
 
     c = s->connection;
 
@@ -976,9 +993,7 @@ ngx_stream_proxy_send_proxy_protocol(ngx
             return NGX_ERROR;
         }
 
-        pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
-
-        ngx_add_timer(pc->write, pscf->timeout);
+        ngx_add_timer(pc->write, ctx->timeout);
 
         pc->write->handler = ngx_stream_proxy_connect_handler;
 
@@ -1053,6 +1068,9 @@ ngx_stream_proxy_ssl_init_connection(ngx
     ngx_connection_t             *pc;
     ngx_stream_upstream_t        *u;
     ngx_stream_proxy_srv_conf_t  *pscf;
+    ngx_stream_proxy_ctx_t       *ctx;
+
+    ctx = ngx_stream_get_module_ctx(s, ngx_stream_proxy_module);
 
     u = s->upstream;
 
@@ -1099,7 +1117,7 @@ ngx_stream_proxy_ssl_init_connection(ngx
     if (rc == NGX_AGAIN) {
 
         if (!pc->write->timer_set) {
-            ngx_add_timer(pc->write, pscf->connect_timeout);
+            ngx_add_timer(pc->write, ctx->connect_timeout);
         }
 
         pc->ssl->handler = ngx_stream_proxy_ssl_handshake;
@@ -1408,6 +1426,7 @@ ngx_stream_proxy_process_connection(ngx_
     ngx_stream_session_t         *s;
     ngx_stream_upstream_t        *u;
     ngx_stream_proxy_srv_conf_t  *pscf;
+    ngx_stream_proxy_ctx_t       *ctx;
 
     c = ev->data;
     s = c->data;
@@ -1419,6 +1438,8 @@ ngx_stream_proxy_process_connection(ngx_
         return;
     }
 
+    ctx = ngx_stream_get_module_ctx(s, ngx_stream_proxy_module);
+
     c = s->connection;
     pc = u->peer.connection;
 
@@ -1438,7 +1459,7 @@ ngx_stream_proxy_process_connection(ngx_
                 }
 
                 if (u->connected && !c->read->delayed && !pc->read->delayed) {
-                    ngx_add_timer(c->write, pscf->timeout);
+                    ngx_add_timer(c->write, ctx->timeout);
                 }
 
                 return;
@@ -1600,6 +1621,9 @@ ngx_stream_proxy_process(ngx_stream_sess
     ngx_log_handler_pt            handler;
     ngx_stream_upstream_t        *u;
     ngx_stream_proxy_srv_conf_t  *pscf;
+    ngx_stream_proxy_ctx_t       *ctx;
+
+    ctx = ngx_stream_get_module_ctx(s, ngx_stream_proxy_module);
 
     u = s->upstream;
 
@@ -1807,7 +1831,7 @@ ngx_stream_proxy_process(ngx_stream_sess
         }
 
         if (!c->read->delayed && !pc->read->delayed) {
-            ngx_add_timer(c->write, pscf->timeout);
+            ngx_add_timer(c->write, ctx->timeout);
 
         } else if (c->write->timer_set) {
             ngx_del_timer(c->write);