linux-kernel - Re: [PATCH 5/9] Allow ptrace from non-init user namespaces

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Date:	Sat, 19 Feb 2011 18:49:47 +0100
From:	Daniel Lezcano <daniel.lezcano@...e.fr>
To:	"Serge E. Hallyn" <serge@...lyn.com>
CC:	xemul@...allels.com, containers@...ts.linux-foundation.org,
	kernel list <linux-kernel@...r.kernel.org>,
	dhowells@...hat.com, LSM <linux-security-module@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Kees Cook <kees.cook@...onical.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Michael Kerrisk <mtk.manpages@...il.com>
Subject: Re: [PATCH 5/9] Allow ptrace from non-init user namespaces

On 02/17/2011 04:03 PM, Serge E. Hallyn wrote:
> ptrace is allowed to tasks in the same user namespace according to
> the usual rules (i.e. the same rules as for two tasks in the init
> user namespace).  ptrace is also allowed to a user namespace to
> which the current task the has CAP_SYS_PTRACE capability.
>
> Changelog:
> 	Dec 31: Address feedback by Eric:
> 		. Correct ptrace uid check
> 		. Rename may_ptrace_ns to ptrace_capable
> 		. Also fix the cap_ptrace checks.
> 	Jan  1: Use const cred struct
> 	Jan 11: use task_ns_capable() in place of ptrace_capable().
>
> Signed-off-by: Serge E. Hallyn<serge.hallyn@...onical.com>
Acked-by: Daniel Lezcano <daniel.lezcano@...e.fr>

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