linux-kernel - Re: + proc-clean-up-proc-pid-environ-handling.patch added to -mm tree

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Message-ID: <4F348A70.4080604@gmail.com>
Date:	Fri, 10 Feb 2012 11:09:36 +0800
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	Oleg Nesterov <oleg@...hat.com>
CC:	Alexey Dobriyan <adobriyan@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: + proc-clean-up-proc-pid-environ-handling.patch added to -mm
 tree

On 02/08/2012 11:15 PM, Oleg Nesterov wrote:
>> From: Cong Wang<xiyou.wangcong@...il.com>
>> Subject: proc: clean up /proc/<pid>/environ handling
>>
>> Similar to e268337dfe2 ("proc: clean up and fix /proc/<pid>/mem
>> handling"),
>
> and has the same problem,
>
>> move the check of permission to open(), this will simplify
>> read() code.
>
> but allows to kill the system trivially.
>
> Please look at 6d08f2c7139790c268820a2e590795cb8333181a
> "proc: make sure mem_open() doesn't pin the target's memory"
>

Thanks, I wasn't aware of that commit. I will send an updated patch soon.

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