From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Date: Mon, 9 Nov 2015 12:19:10 +0000 (+0100)
Subject: net: caif: check return value of alloc_netdev
X-Git-Tag: firefly_0821_release~176^2~722^2~8
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=cfb76d77c009b38e607c8a2adc8bdd57b5081768;p=firefly-linux-kernel-4.4.55.git

net: caif: check return value of alloc_netdev

I don't know if dev can actually be NULL here, but the test should be
above alloc_netdev(), to avoid leaking the struct net_device in case
dev is actually NULL. And of course the return value from alloc_netdev
should be tested.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/caif/caif_spi.c b/drivers/net/caif/caif_spi.c
index de3962014af7..4721948a92f6 100644
--- a/drivers/net/caif/caif_spi.c
+++ b/drivers/net/caif/caif_spi.c
@@ -730,11 +730,14 @@ int cfspi_spi_probe(struct platform_device *pdev)
 	int res;
 	dev = (struct cfspi_dev *)pdev->dev.platform_data;
 
-	ndev = alloc_netdev(sizeof(struct cfspi), "cfspi%d",
-			    NET_NAME_UNKNOWN, cfspi_setup);
 	if (!dev)
 		return -ENODEV;
 
+	ndev = alloc_netdev(sizeof(struct cfspi), "cfspi%d",
+			    NET_NAME_UNKNOWN, cfspi_setup);
+	if (!ndev)
+		return -ENOMEM;
+
 	cfspi = netdev_priv(ndev);
 	netif_stop_queue(ndev);
 	cfspi->ndev = ndev;