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Date: Fri, 23 Sep 2011 19:36:56 +0200
From: Oleg Nesterov <oleg@redhat.com>
To: "Serge E. Hallyn" <serge.hallyn@canonical.com>
Cc: lkml <linux-kernel@vger.kernel.org>, richard@nod.at,
        Andrew Morton <akpm@google.com>,
        "Eric W. Biederman" <ebiederm@xmission.com>, Tejun Heo <tj@kernel.org>,
        serge@hallyn.com
Subject: Re: [PATCH] user namespace: make signal.c respect user namespaces
Message-ID: <20110923173656.GA5233@redhat.com>
References: <20110919214531.GA18085@sergelap> <20110920174849.GB22317@redhat.com> <20110920185354.GA19629@sergelap> <20110921175357.GA25590@redhat.com> <20110923163113.GA3820@sergelap>
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On 09/23, Serge E. Hallyn wrote:
>
> It looks like I can fix all the
> cases

except ptrace_signal(). Although we can simply ignore this case, imho.

> at send_signal()

Yes, I was thinking about this too but didn't have the time to check
if this can really work.

> by checking whether si_fromuser(info)

I am not sure... sys_rt_queueinfo() is nasty. Plus we have to handle
the "fromkernel" case too. May be we can ignore this too.

Oleg.