nginx 0.4.14 *) Feature: the "proxy_pass_error_message" directive in IMAP/POP3 proxy. *) Feature: now configure detects system PCRE library on FreeBSD, Linux, and NetBSD. *) Bugfix: ngx_http_perl_module did not work with perl built with the threads support; bug appeared in 0.3.38. *) Bugfix: ngx_http_perl_module did not work if perl was called recursively. *) Bugfix: nginx ignored a host name in an request line. *) Bugfix: a worker process may got caught in an endless loop, if a FastCGI server sent too many data to the stderr. *) Bugfix: the $upstream_response_time variable may be negative if the system time was changed backward. *) Bugfix: the "Auth-Login-Attempt" parameter was not sent to IMAP/POP3 proxy authentication server when POP3 was used. *) Bugfix: a segmentation fault might occur if connect to IMAP/POP3 proxy authentication server failed.

--- a/src/event/ngx_event_pipe.c
+++ b/src/event/ngx_event_pipe.c
@@ -295,6 +295,7 @@ ngx_event_pipe_read_upstream(ngx_event_p
 
         p->read_length += n;
         cl = chain;
+        p->free_raw_bufs = NULL;
 
         while (cl && n > 0) {
 
@@ -322,7 +323,12 @@ ngx_event_pipe_read_upstream(ngx_event_p
             }
         }
 
-        p->free_raw_bufs = cl;
+        if (cl) {
+            for (ln = cl; ln->next; ln = ln->next) { /* void */ }
+
+            ln->next = p->free_raw_bufs;
+            p->free_raw_bufs = cl;
+        }
     }
 
 #if (NGX_DEBUG)