From: Sergey Kandaurov <pluknet@nginx.com>
Date: Mon, 16 Oct 2017 10:13:25 +0000 (+0300)
Subject: Postpone filter: handled ngx_http_postpone_filter_add() failures.
X-Git-Tag: release-1.13.7~8
X-Git-Url: http://www.kaiwu.me/postgresql/commit/?a=commitdiff_plain;h=fdbf551602c3cca974d722ab36caeb191a19746c;p=nginx.git

Postpone filter: handled ngx_http_postpone_filter_add() failures.

In particular, if ngx_http_postpone_filter_add() fails in ngx_chain_add_copy(),
the output chain of the postponed request was left in an invalid state.
---

diff --git a/src/http/ngx_http_postpone_filter_module.c b/src/http/ngx_http_postpone_filter_module.c
index e893b8364..55f2698c5 100644
--- a/src/http/ngx_http_postpone_filter_module.c
+++ b/src/http/ngx_http_postpone_filter_module.c
@@ -63,7 +63,10 @@ ngx_http_postpone_filter(ngx_http_request_t *r, ngx_chain_t *in)
     if (r != c->data) {
 
         if (in) {
-            ngx_http_postpone_filter_add(r, in);
+            if (ngx_http_postpone_filter_add(r, in) != NGX_OK) {
+                return NGX_ERROR;
+            }
+
             return NGX_OK;
         }
 
@@ -86,7 +89,9 @@ ngx_http_postpone_filter(ngx_http_request_t *r, ngx_chain_t *in)
     }
 
     if (in) {
-        ngx_http_postpone_filter_add(r, in);
+        if (ngx_http_postpone_filter_add(r, in) != NGX_OK) {
+            return NGX_ERROR;
+        }
     }
 
     do {