linux-kernel - Re: [PATCH 1/2] NFC: delete null dereference

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Message-ID: <20151020045058.GG9764@zurbaran.home>
Date:	Tue, 20 Oct 2015 06:50:58 +0200
From:	Samuel Ortiz <sameo@...ux.intel.com>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	Lauro Ramos Venancio <lauro.venancio@...nbossa.org>,
	kernel-janitors@...r.kernel.org,
	Aloisio Almeida Jr <aloisio.almeida@...nbossa.org>,
	"David S. Miller" <davem@...emloft.net>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] NFC: delete null dereference

Hi Julia,

On Sat, Oct 17, 2015 at 11:32:19AM +0200, Julia Lawall wrote:
> The exit label performs device_unlock(&dev->dev);, which will fail when dev
> is NULL, and nfc_put_device(dev);, which is not useful when dev is NULL, so
> just exit the function immediately.
> 
> Problem found using scripts/coccinelle/null/deref_null.cocci
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> 
> ---
>  net/nfc/netlink.c |    6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
Applied to nfc-next, thanks.

Cheers,
Samuel.
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