From: Sergey Kandaurov <pluknet@nginx.com>
Date: Tue, 1 Jun 2021 08:41:38 +0000 (+0300)
Subject: HTTP/3: fixed parsing encoder insertions with empty header value.
X-Git-Tag: release-1.25.0~4^2~320
X-Git-Url: http://git.kaiwu.me/postgresql/log/contrib/postgres_fdw/postgres_fdw.c?a=commitdiff_plain;h=1f85c660cb3e94b60a0f2ec8495f72a43cddb378;p=nginx.git

HTTP/3: fixed parsing encoder insertions with empty header value.

When starting processing a new encoder instruction, the header state is not
memzero'ed because generally it's burdensome.  If the header value is empty,
this resulted in inserting a stale value left from the previous instruction.

Based on a patch by Zhiyong Sun.
---

diff --git a/src/http/v3/ngx_http_v3_parse.c b/src/http/v3/ngx_http_v3_parse.c
index fcb39b209..40366e665 100644
--- a/src/http/v3/ngx_http_v3_parse.c
+++ b/src/http/v3/ngx_http_v3_parse.c
@@ -1366,6 +1366,7 @@ ngx_http_v3_parse_header_inr(ngx_connection_t *c,
 
         st->literal.length = st->pint.value;
         if (st->literal.length == 0) {
+            st->value.len = 0;
             goto done;
         }
 
@@ -1470,6 +1471,7 @@ ngx_http_v3_parse_header_iwnr(ngx_connection_t *c,
 
         st->literal.length = st->pint.value;
         if (st->literal.length == 0) {
+            st->value.len = 0;
             goto done;
         }