# HG changeset patch
# User Igor Sysoev <igor@sysoev.ru>
# Date 1239014320 0
# Node ID 278f30cc7d486b3637ef17c71d3f5c7c3a21886a
# Parent  03fc1ae2cf36bd306bf685f13f34b95ae16a1a2d
fix ngx_strlcasestrn()

diff --git a/src/core/ngx_string.c b/src/core/ngx_string.c
--- a/src/core/ngx_string.c
+++ b/src/core/ngx_string.c
@@ -703,6 +703,10 @@ ngx_strlcasestrn(u_char *s1, u_char *las
 {
     ngx_uint_t  c1, c2;
 
+    if (s1 <= last) {
+        return NULL;
+    }
+
     c2 = (ngx_uint_t) *s2++;
     c2  = (c2 >= 'A' && c2 <= 'Z') ? (c2 | 0x20) : c2;
     last -= n;