From: Tycho Andersen <tycho@tycho.ws>
To: Oleg Nesterov <oleg@redhat.com>
Cc: linux-kernel@vger.kernel.org,
containers@lists.linux-foundation.org,
Kees Cook <keescook@chromium.org>,
Andy Lutomirski <luto@amacapital.net>,
"Eric W . Biederman" <ebiederm@xmission.com>,
"Serge E . Hallyn" <serge@hallyn.com>,
Christian Brauner <christian.brauner@ubuntu.com>,
Tyler Hicks <tyhicks@canonical.com>,
Akihiro Suda <suda.akihiro@lab.ntt.co.jp>,
"Tobin C . Harding" <me@tobin.cc>
Subject: Re: [PATCH v2 3/4] seccomp: add a way to get a listener fd from ptrace
Date: Thu, 17 May 2018 09:59:32 -0600 [thread overview]
Message-ID: <20180517155932.GC3831@cisco> (raw)
In-Reply-To: <20180517155733.GB3831@cisco>
On Thu, May 17, 2018 at 09:57:33AM -0600, Tycho Andersen wrote:
> On Thu, May 17, 2018 at 05:41:39PM +0200, Oleg Nesterov wrote:
> > and since init_listener() does __get_seccomp_filter() on sucess, it is needed
> > uncondtitionally?
>
> I think there does need to be a __get_seccomp_filter() on success in
> init_listener(), because it's paired with the __put_seccomp_filter in
> seccomp_notify_release. The listener fd has a reference to the filter,
> and that shouldn't go away until after the fd is freed.
Oh, sorry. I see what you meant here. Yes, it should be unconditional.
Tycho
next prev parent reply other threads:[~2018-05-17 15:59 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-17 15:12 [PATCH v2 0/4] seccomp trap to userspace Tycho Andersen
2018-05-17 15:12 ` [PATCH v2 1/4] seccomp: add a return code to " Tycho Andersen
2018-05-17 15:33 ` Oleg Nesterov
2018-05-17 15:39 ` Tycho Andersen
2018-05-17 15:46 ` Oleg Nesterov
2018-05-24 15:28 ` Tycho Andersen
2018-05-18 14:04 ` Christian Brauner
2018-05-18 15:21 ` Tycho Andersen
2018-05-19 0:14 ` kbuild test robot
2018-05-19 5:01 ` kbuild test robot
2018-05-21 22:55 ` Tycho Andersen
2018-05-17 15:12 ` [PATCH v2 2/4] seccomp: make get_nth_filter available outside of CHECKPOINT_RESTORE Tycho Andersen
2018-05-17 15:12 ` [PATCH v2 3/4] seccomp: add a way to get a listener fd from ptrace Tycho Andersen
2018-05-17 15:41 ` Oleg Nesterov
2018-05-17 15:57 ` Tycho Andersen
2018-05-17 15:59 ` Tycho Andersen [this message]
2018-05-18 14:05 ` Christian Brauner
2018-05-18 15:10 ` Tycho Andersen
2018-05-17 15:12 ` [PATCH v2 4/4] seccomp: add support for passing fds via USER_NOTIF Tycho Andersen
2018-05-18 14:03 ` [PATCH v2 0/4] seccomp trap to userspace Christian Brauner
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