From: Valentin Bartenev <vbart@nginx.com>
Date: Tue, 28 Apr 2015 15:55:03 +0000 (+0300)
Subject: Fixed overflow detection in ngx_inet_addr().
X-Git-Tag: release-1.9.1~20
X-Git-Url: http://www.kaiwu.me/postgresql/commit/?a=commitdiff_plain;h=89ad9ea30946dacb2fcf088a97f5a40d3b408d2c;p=nginx.git

Fixed overflow detection in ngx_inet_addr().

Overflow detection of the last octet might not work.

Reported by Sergey Polovko.
---

diff --git a/src/core/ngx_inet.c b/src/core/ngx_inet.c
index 2c84daf6e..96a04fded 100644
--- a/src/core/ngx_inet.c
+++ b/src/core/ngx_inet.c
@@ -26,15 +26,15 @@ ngx_inet_addr(u_char *text, size_t len)
     n = 0;
 
     for (p = text; p < text + len; p++) {
-
-        if (octet > 255) {
-            return INADDR_NONE;
-        }
-
         c = *p;
 
         if (c >= '0' && c <= '9') {
             octet = octet * 10 + (c - '0');
+
+            if (octet > 255) {
+                return INADDR_NONE;
+            }
+
             continue;
         }