From: Michal Hocko <mhocko@suse.cz>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Tejun Heo <tj@kernel.org>, David Rientjes <rientjes@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: oom && coredump
Date: Tue, 2 Dec 2014 09:59:49 +0100 [thread overview]
Message-ID: <20141202085949.GA27014@dhcp22.suse.cz> (raw)
In-Reply-To: <20141127174747.GA7684@redhat.com>
On Thu 27-11-14 18:47:47, Oleg Nesterov wrote:
> On 11/27, Michal Hocko wrote:
[...]
> > Why is the ptrace check wrong?
>
> It was added in reply to exploit I sent. But:
>
> - It doesn't (and can't) really work, it can only detect this particular
> case and the same exploit still blocks oom-killer with the minimal
> modifications.
>
> - Once again, this has nothing to do with ptrace. That exploit used
> ptrace only to control (freeze) the coredumping process, the coredumping
> can "hang" because of other reasons.
>
> - It is no longer needed after this patch, the coredumping process will
> be killed.
OK, I guess I am seeing it now. Thanks for the clarification!
[...]
--
Michal Hocko
SUSE Labs
prev parent reply other threads:[~2014-12-02 8:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-17 17:19 + oom-pm-oom-killed-task-cannot-escape-pm-suspend.patch added to -mm tree Oleg Nesterov
2014-10-20 18:46 ` Michal Hocko
2014-10-20 19:06 ` Oleg Nesterov
2014-10-20 19:56 ` oom && coredump Oleg Nesterov
2014-11-27 12:29 ` Michal Hocko
2014-11-27 17:47 ` Oleg Nesterov
2014-12-02 8:59 ` Michal Hocko [this message]
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