From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cyril Hrubis Date: Mon, 30 Mar 2020 11:18:36 +0200 Subject: [LTP] [PATCH v3 1/3] security/dirtyc0w: Fix bug caused by default umask In-Reply-To: <1585553269-119544-2-git-send-email-zou_wei@huawei.com> References: <1585553269-119544-1-git-send-email-zou_wei@huawei.com> <1585553269-119544-2-git-send-email-zou_wei@huawei.com> Message-ID: <20200330091835.GA9845@yuki.lan> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it Hi! > The case is only successful when system default umask is 0022. > When default umask is 0077 or other values, should clear current umask by umask(0) in setup(). What exactly fails in the dirtyc0w because of non-standard umask? I can easily understand why fstat and statx fail, since we check the file permissions there. Ideally the failure should have been part of the patch description. -- Cyril Hrubis chrubis@suse.cz