From 49f0b0d99d70fa4e895b939a320c29df28a34fff Mon Sep 17 00:00:00 2001
From: Roman Arutyunyan <arut@nginx.com>
Date: Tue, 17 Nov 2020 21:12:36 +0000
Subject: [PATCH] HTTP/3: finalize chunked response body chain with NULL.

Unfinalized chain could result in segfault.  The problem was introduced in
ef83990f0e25.

Patch by Andrey Kolyshkin.
---
 src/http/modules/ngx_http_chunked_filter_module.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/http/modules/ngx_http_chunked_filter_module.c b/src/http/modules/ngx_http_chunked_filter_module.c
index 371559e2f..138369815 100644
--- a/src/http/modules/ngx_http_chunked_filter_module.c
+++ b/src/http/modules/ngx_http_chunked_filter_module.c
@@ -216,6 +216,9 @@ ngx_http_chunked_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
             cl->buf->last_buf = 0;
 
             *ll = tl;
+
+        } else {
+            *ll = NULL;
         }
 
     } else