netdev - Re: [PATCH v2 net] nfc: use GFP_USER for user-controlled kmalloc

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Message-ID: <20160225074317.GA9068@zurbaran.home>
Date:	Thu, 25 Feb 2016 08:43:17 +0100
From:	Samuel Ortiz <sameo@...ux.intel.com>
To:	Cong Wang <xiyou.wangcong@...il.com>
Cc:	netdev@...r.kernel.org, dvyukov@...gle.com,
	linux-wireless@...r.kernel.org, julian.calaby@...il.com,
	eric.dumazet@...il.com,
	Lauro Ramos Venancio <lauro.venancio@...nbossa.org>,
	Aloisio Almeida Jr <aloisio.almeida@...nbossa.org>
Subject: Re: [PATCH v2 net] nfc: use GFP_USER for user-controlled kmalloc

Hi Cong,

On Fri, Jan 29, 2016 at 11:24:24AM -0800, Cong Wang wrote:
> These two functions are called in sendmsg path, and the
> 'len' is passed from user-space, so we should not allow
> malicious users to OOM kernel on purpose.
> 
> Reported-by: Dmitry Vyukov <dvyukov@...gle.com>
> Cc: Lauro Ramos Venancio <lauro.venancio@...nbossa.org>
> Cc: Aloisio Almeida Jr <aloisio.almeida@...nbossa.org>
> Cc: Samuel Ortiz <sameo@...ux.intel.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
> ---
>  net/nfc/llcp_commands.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
Applied to nfc-next, thanks.

Cheers,
Samuel.