From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Vincent=20Stehl=C3=A9?= Subject: [PATCH] nfc: netlink: avoid NULL pointer dereference on error Date: Wed, 7 Oct 2015 11:33:19 +0200 Message-ID: <1444210399-3913-1-git-send-email-vincent.stehle@laposte.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Vincent=20Stehl=C3=A9?= , Thierry Escande , Samuel Ortiz To: linux-wireless@vger.kernel.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org The function nfc_genl_llc_sdreq() can dereference the dev pointer while it is NULL on its error path. Create a new error handling label to avoi= d that. This fixes the following coccinelle error: ./net/nfc/netlink.c:1175:21-24: ERROR: dev is NULL but dereferenced. Signed-off-by: Vincent Stehl=C3=A9 Cc: Thierry Escande Cc: Samuel Ortiz --- net/nfc/netlink.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index 853172c..51c48f0 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -1111,7 +1111,7 @@ static int nfc_genl_llc_sdreq(struct sk_buff *skb= , struct genl_info *info) dev =3D nfc_get_device(idx); if (!dev) { rc =3D -ENODEV; - goto exit; + goto exit_nodev; } =20 device_lock(&dev->dev); @@ -1176,6 +1176,7 @@ exit: =20 nfc_put_device(dev); =20 +exit_nodev: return rc; } =20 --=20 2.5.1