Commit 9abebb8a authored Oct 17, 2015 by Julia Lawall Committed by Samuel Ortiz Oct 19, 2015

NFC: delete null dereference



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@lip6.fr>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

parent b43ef781

net/nfc/netlink.c

+2 −4

Original line number	Diff line number	Diff line
		@@ -1109,10 +1109,8 @@ static int nfc_genl_llc_sdreq(struct sk_buff skb, struct genl_info info)
		idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);

		dev = nfc_get_device(idx);
		if (!dev) {
		rc = -ENODEV;
		goto exit;
		}
		if (!dev)
		return -ENODEV;

		device_lock(&dev->dev);