linux-kernel - Re: [RFC] fs/kcore: change copy_to_user to copy_in

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Message-Id: <B5505FA8-6104-4DDE-AD39-B3AB70FA44A3@gmail.com>
Date:	Thu, 20 Aug 2015 18:45:08 +0800
From:	yalin wang <yalin.wang2010@...il.com>
To:	Frans Klaver <fransklaver@...il.com>
Cc:	bp@...e.de, Ingo Molnar <mingo@...nel.org>, dave@...1.net,
	bhe@...hat.com, Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] fs/kcore: change copy_to_user to copy_in_user


> On Aug 20, 2015, at 17:58, Frans Klaver <fransklaver@...il.com> wrote:
> 
> On Thu, Aug 20, 2015 at 10:59 AM, yalin wang <yalin.wang2010@...il.com> wrote:
>> the copy_to_user() here expect can fix the fault on both kernel and
>> user address, this is not true on other platforms except x86,
>> change to user copy_in_user() so that can detect the page fault,
>> work as expected.
> 
> Could you rephrase this into multiple sentences in comprehensible
> English? What is the expected behavior, what is the unexpected
> behavior and what can people do to trigger it?
> 
ok, i will send a V2 patch.

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