From: Oleg Nesterov <oleg@redhat.com>
To: Tycho Andersen <tycho.andersen@canonical.com>
Cc: Andrey Wagin <avagin@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-api@vger.kernel.org, Kees Cook <keescook@chromium.org>,
Andy Lutomirski <luto@amacapital.net>,
Will Drewry <wad@chromium.org>,
Roland McGrath <roland@hack.frob.com>,
Pavel Emelyanov <xemul@parallels.com>,
"Serge E. Hallyn" <serge.hallyn@ubuntu.com>
Subject: Re: [PATCH] seccomp: add ptrace commands for suspend/resume
Date: Tue, 2 Jun 2015 20:48:48 +0200 [thread overview]
Message-ID: <20150602184848.GA24907@redhat.com> (raw)
In-Reply-To: <20150602130506.GA1823@hopstrocity>
On 06/02, Tycho Andersen wrote:
>
> > Do we need to re-enable seccomp if a tracer detaches unexpectedly.
> > CRIU can be killed and we should try to not affect the task state even
> > in this case.
>
> Yes, I think Pavel's suggestion on the CRIU list of simply
> automatically re-enabling seccomp on ptrace detach
But note that you can't enable tsc if the tracer dies, in this case
the tracee can be running.
Otherwise, if we use PTRACE_O_ instead, it goes away automatically if
the tracer dies or does PTRACE_DETACH.
Oleg.
next prev parent reply other threads:[~2015-06-02 18:48 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-01 19:28 [PATCH] seccomp: add ptrace commands for suspend/resume Tycho Andersen
2015-06-01 19:28 ` Tycho Andersen
[not found] ` <1433186918-9626-1-git-send-email-tycho.andersen-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
2015-06-01 19:38 ` Andy Lutomirski
2015-06-01 19:38 ` Andy Lutomirski
[not found] ` <CALCETrVaE5UsTSQDf=48R8J9gG6YiMdp30wOMD+aZvxtOjrLRQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-01 19:47 ` Tycho Andersen
2015-06-01 19:47 ` Tycho Andersen
2015-06-01 19:51 ` Andy Lutomirski
2015-06-01 19:51 ` Andy Lutomirski
[not found] ` <CALCETrU2c99wQHfVS6Bi_7=sAYSr-gEUpRdgz=+FiGgGxbPyMg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-01 20:12 ` Tycho Andersen
2015-06-01 20:12 ` Tycho Andersen
2015-06-02 15:46 ` Tycho Andersen
2015-06-01 20:00 ` Tycho Andersen
2015-06-01 20:00 ` Tycho Andersen
2015-06-02 9:36 ` Andrey Wagin
2015-06-02 9:36 ` Andrey Wagin
[not found] ` <CANaxB-zacYuo21jLVZyEfyf=UdDnTjYvHdgNpfL+c_DXWRz-eg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-02 13:05 ` Tycho Andersen
2015-06-02 13:05 ` Tycho Andersen
2015-06-02 18:48 ` Oleg Nesterov [this message]
[not found] ` <20150602184848.GA24907-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-06-03 16:13 ` Tycho Andersen
2015-06-03 16:13 ` Tycho Andersen
2015-06-03 16:54 ` Oleg Nesterov
2015-06-03 16:54 ` Oleg Nesterov
[not found] ` <20150603165451.GA20911-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-06-03 16:58 ` Tycho Andersen
2015-06-03 16:58 ` Tycho Andersen
2015-06-03 18:36 ` Tycho Andersen
2015-06-03 18:36 ` Tycho Andersen
2015-06-02 18:28 ` Oleg Nesterov
2015-06-02 18:28 ` Oleg Nesterov
[not found] ` <20150602182829.GA23449-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-06-02 19:02 ` Pavel Emelyanov
2015-06-02 19:02 ` Pavel Emelyanov
2015-06-02 19:24 ` Jann Horn
[not found] ` <556DFDB2.3050205-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2015-06-02 19:27 ` Andy Lutomirski
2015-06-02 19:27 ` Andy Lutomirski
[not found] ` <CALCETrVYHYfogj3nTY-3ui87+tVi3mG3D4=Xdk-_MpisG8BczA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-03 14:45 ` Tycho Andersen
2015-06-03 14:45 ` Tycho Andersen
2015-06-02 21:27 ` Oleg Nesterov
2015-06-02 21:27 ` Oleg Nesterov
2015-06-03 14:43 ` Tycho Andersen
2015-06-03 14:43 ` Tycho Andersen
2015-06-03 16:41 ` Oleg Nesterov
2015-06-03 16:41 ` Oleg Nesterov
[not found] ` <20150603164121.GA19189-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-06-03 17:10 ` Tycho Andersen
2015-06-03 17:10 ` Tycho Andersen
2015-06-03 17:11 ` Andy Lutomirski
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