From cdbdbbd8423ab96c89c034d879b16b1a931eb38a Mon Sep 17 00:00:00 2001
From: Ruslan Ermilov <ru@nginx.com>
Date: Thu, 16 Nov 2017 13:20:47 +0300
Subject: [PATCH] Xslt: fixed parameters parsing (ticket #1416).

If parameters were specified in xslt_stylesheet without variables,
any request except the first would cause an internal server error.
---
 src/http/modules/ngx_http_xslt_filter_module.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/http/modules/ngx_http_xslt_filter_module.c b/src/http/modules/ngx_http_xslt_filter_module.c
index fae5895508..ea7ce2a5c9 100644
--- a/src/http/modules/ngx_http_xslt_filter_module.c
+++ b/src/http/modules/ngx_http_xslt_filter_module.c
@@ -686,8 +686,19 @@ ngx_http_xslt_params(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx,
          * specified in xslt_stylesheet directives
          */
 
-        p = string.data;
-        last = string.data + string.len;
+        if (param[i].value.lengths) {
+            p = string.data;
+
+        } else {
+            p = ngx_pnalloc(r->pool, string.len + 1);
+            if (p == NULL) {
+                return NGX_ERROR;
+            }
+
+            ngx_memcpy(p, string.data, string.len + 1);
+        }
+
+        last = p + string.len;
 
         while (p && *p) {