From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f173.google.com ([209.85.192.173]:34540 "EHLO mail-pd0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757234Ab3EBCsT (ORCPT ); Wed, 1 May 2013 22:48:19 -0400 Received: by mail-pd0-f173.google.com with SMTP id v10so90034pde.4 for ; Wed, 01 May 2013 19:48:19 -0700 (PDT) Received: from localhost.localdomain ([220.248.17.187]) by mx.google.com with ESMTPSA id be7sm6101800pad.20.2013.05.01.19.48.16 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 01 May 2013 19:48:18 -0700 (PDT) From: Lin Ming To: linux-btrfs@vger.kernel.org Subject: [PATCH] btrfs-progs: fix segfault in walk_down_tree Date: Thu, 2 May 2013 10:46:43 +0800 Message-Id: <1367462803-6630-1-git-send-email-mlin@kernel.org> Sender: linux-btrfs-owner@vger.kernel.org List-ID: walk_down_tree will fault when read_tree_block fails with NULL returned. Signed-off-by: Lin Ming --- cmds-check.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/cmds-check.c b/cmds-check.c index 12192fa..e4435d5 100644 --- a/cmds-check.c +++ b/cmds-check.c @@ -1256,6 +1256,8 @@ static int walk_down_tree(struct btrfs_root *root, struct btrfs_path *path, reada_walk_down(root, cur, path->slots[*level]); next = read_tree_block(root, bytenr, blocksize, ptr_gen); + if (!next) + goto out; } *level = *level - 1; -- 1.7.2.5