# HG changeset patch
# User Igor Sysoev <igor@sysoev.ru>
# Date 1184872317 0
# Node ID 345d2095a6d58224a07fdd21a72b728f6c877af4
# Parent  114428c61a3aff8f2416079247ca587f4daad8b8
fix potential double free(),
found by Coverity's Scan

diff --git a/src/core/ngx_file.c b/src/core/ngx_file.c
--- a/src/core/ngx_file.c
+++ b/src/core/ngx_file.c
@@ -518,6 +518,9 @@ ngx_walk_tree(ngx_tree_ctx_t *ctx, ngx_s
         }
 
         ctx->data = data;
+
+    } else {
+        data = NULL;
     }
 
     for ( ;; ) {
@@ -643,8 +646,8 @@ done:
         ngx_free(buf.data);
     }
 
-    if (ctx->alloc) {
-        ngx_free(ctx->data);
+    if (data) {
+        ngx_free(data);
         ctx->data = prev;
     }