linux-kernel - Re: [PATCH] Add PR_{GET,SET}_NO_NEW_PRIVS to prevent execve from granting privs

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Message-ID: <20120113164547.GA22061@redhat.com>
Date:	Fri, 13 Jan 2012 17:45:47 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Will Drewry <wad@...omium.org>, torvalds@...ux-foundation.org,
	linux-kernel@...r.kernel.org, keescook@...omium.org,
	john.johansen@...onical.com, serge.hallyn@...onical.com,
	coreyb@...ux.vnet.ibm.com, pmoore@...hat.com, eparis@...hat.com,
	djm@...drot.org, segoon@...nwall.com, rostedt@...dmis.org,
	jmorris@...ei.org, scarybeasts@...il.com, avi@...hat.com,
	penberg@...helsinki.fi, viro@...iv.linux.org.uk, luto@....EDU,
	mingo@...e.hu, akpm@...ux-foundation.org, khilman@...com,
	borislav.petkov@....com, amwang@...hat.com, ak@...ux.intel.com,
	eric.dumazet@...il.com, gregkh@...e.de, dhowells@...hat.com,
	daniel.lezcano@...e.fr, linux-fsdevel@...r.kernel.org,
	linux-security-module@...r.kernel.org, olofj@...omium.org,
	mhalcrow@...gle.com, dlaor@...hat.com, corbet@....net,
	alan@...rguk.ukuu.org.uk
Subject: Re: [PATCH] Add PR_{GET,SET}_NO_NEW_PRIVS to prevent execve from
	granting privs

On 01/12, Andy Lutomirski wrote:
>
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -1117,6 +1117,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
>  	if (retval < 0)
>  		goto bad_fork_free;
>  
> +	p->no_new_privs = current->no_new_privs;

unnecessary, this is copied by dup_task_struct().

Oleg.

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