[nginx] Realip: fixed uninitialized memory access.

[Roman Arutyunyan]

details:   http://hg.nginx.org/nginx/rev/6b1b8c4b7a95
branches:  
changeset: 6671:6b1b8c4b7a95
user:      Roman Arutyunyan <arut at nginx.com>
date:      Thu Sep 01 14:33:51 2016 +0300
description:
Realip: fixed uninitialized memory access.

Previously, the realip module could be left with uninitialized context after an
error in the ngx_http_realip_set_addr() function.  That context could be later
accessed by $realip_remote_addr and $realip_remote_port variable handlers.

diffstat:

 src/http/modules/ngx_http_realip_module.c |  2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diffs (19 lines):

diff -r c6372a40c2a7 -r 6b1b8c4b7a95 src/http/modules/ngx_http_realip_module.c
--- a/src/http/modules/ngx_http_realip_module.c	Fri Aug 26 15:33:07 2016 +0300
+++ b/src/http/modules/ngx_http_realip_module.c	Thu Sep 01 14:33:51 2016 +0300
@@ -264,7 +264,6 @@ ngx_http_realip_set_addr(ngx_http_reques
     }
 
     ctx = cln->data;
-    ngx_http_set_ctx(r, ctx, ngx_http_realip_module);
 
     c = r->connection;
 
@@ -282,6 +281,7 @@ ngx_http_realip_set_addr(ngx_http_reques
     ngx_memcpy(p, text, len);
 
     cln->handler = ngx_http_realip_cleanup;
+    ngx_http_set_ctx(r, ctx, ngx_http_realip_module);
 
     ctx->connection = c;
     ctx->sockaddr = c->sockaddr;