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changeset 7858:7f702d35ac38 stable-1.20

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Resolver: fixed off-by-one write in ngx_resolver_copy(). Reported by Luis Merino, Markus Vervier, Eric Sesterhenn, X41 D-Sec GmbH.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 25 May 2021 15:17:36 +0300
parents 76871d1340ea
children 5d561a77502e
files src/core/ngx_resolver.c
diffstat 1 files changed, 4 insertions(+), 4 deletions(-) [+]
line wrap: on
line diff
--- a/src/core/ngx_resolver.c
+++ b/src/core/ngx_resolver.c
@@ -4008,15 +4008,15 @@ done:
             n = *src++;
 
         } else {
+            if (dst != name->data) {
+                *dst++ = '.';
+            }
+
             ngx_strlow(dst, src, n);
             dst += n;
             src += n;
 
             n = *src++;
-
-            if (n != 0) {
-                *dst++ = '.';
-            }
         }
 
         if (n == 0) {