From: Oleksij Rempel <o.rempel@pengutronix.de>
Date: Thu, 29 Apr 2021 11:08:31 +0000 (+0200)
Subject: net: dsa: ksz: ksz8863_smi_probe: fix possible NULL pointer dereference
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d27f0201b93cb1016c232c46e0b8e1bf4c02a7ea;p=linux.git

net: dsa: ksz: ksz8863_smi_probe: fix possible NULL pointer dereference

Fix possible NULL pointer dereference in case devm_kzalloc() failed to
allocate memory.

Fixes: 60a364760002 ("net: dsa: microchip: Add Microchip KSZ8863 SMI based driver support")
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/dsa/microchip/ksz8863_smi.c b/drivers/net/dsa/microchip/ksz8863_smi.c
index 30d97ea7a949c..9fb38e99001a4 100644
--- a/drivers/net/dsa/microchip/ksz8863_smi.c
+++ b/drivers/net/dsa/microchip/ksz8863_smi.c
@@ -147,6 +147,9 @@ static int ksz8863_smi_probe(struct mdio_device *mdiodev)
 	int i;
 
 	ksz8 = devm_kzalloc(&mdiodev->dev, sizeof(struct ksz8), GFP_KERNEL);
+	if (!ksz8)
+		return -ENOMEM;
+
 	ksz8->priv = mdiodev;
 
 	dev = ksz_switch_alloc(&mdiodev->dev, ksz8);