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Date:	Wed, 27 Jan 2016 10:15:57 +1100
From:	Julian Calaby <>
To:	Cong Wang <>
Cc:	netdev <>,
	Dmitry Vyukov <>,
	linux-wireless <>,
	Lauro Ramos Venancio <>,
	Aloisio Almeida Jr <>,
	Samuel Ortiz <>
Subject: Re: [PATCH RESEND net] nfc: use GFP_USER for user-controlled kmalloc

Hi Cong,

On Wed, Jan 27, 2016 at 10:12 AM, Cong Wang <> wrote:
> On Tue, Jan 26, 2016 at 2:55 PM, Julian Calaby <> wrote:
>> Hi Cong,
>> On Wed, Jan 27, 2016 at 4:53 AM, Cong Wang <> wrote:
>> A commit message would be nice. A brief rundown of how this is called
>> from userspace would be nice (I'm talking a single sentence here, e.g.
>> "this is allocated when submitting a nfc packet") and what issue
>> __GFP_NOWARN is fixing. (I'm guessing log spam due to allocation
>> failures.)
> I thought it is obvious. ;) Keep in mind that $subject is one part of commit
> message too, so there is a commit message although very short.
> I will add it.

I know almost nothing about how the NFC subsystem works, and this
looks like a potential security issue, so more information is better


Julian Calaby


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