linux-kernel - Re: [PATCH net-next 1/3] bpf: introduce current->pid, tgid, uid, gid, comm accessors

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Message-ID: <557B6D74.2070305@plumgrid.com>
Date:	Fri, 12 Jun 2015 16:38:28 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Andy Lutomirski <luto@...capital.net>
CC:	"David S. Miller" <davem@...emloft.net>,
	Ingo Molnar <mingo@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Wang Nan <wangnan0@...wei.com>, Li Zefan <lizefan@...wei.com>,
	Daniel Wagner <daniel.wagner@...-carit.de>,
	Daniel Borkmann <daniel@...earbox.net>,
	Linux API <linux-api@...r.kernel.org>,
	Network Development <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next 1/3] bpf: introduce current->pid, tgid, uid,
 gid, comm accessors

On 6/12/15 4:25 PM, Andy Lutomirski wrote:
> It's a dangerous tool.  Also, shouldn't the returned uid match the
> namespace of the task that installed the probe, not the task that's
> being probed?

so leaking info to unprivileged apps is the concern?
The whole thing is for root only as you know.
The non-root is still far away. Today root needs to see the whole
kernel. That was the goal from the beginning.

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