From: Florian Fainelli <f.fainelli@gmail.com>
Date: Fri, 22 Feb 2019 22:02:14 +0000 (-0800)
Subject: staging: fsl-dpaa2: ethsw: Add missing netdevice check
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=11f27765f61175ac9602a05e305b9034dc6c80bf;p=linux.git

staging: fsl-dpaa2: ethsw: Add missing netdevice check

port_switchdev_event() does not check that the target network device is
actually backed by the ethsw driver, this could be problematic in a
stacked environment case.

Fixes: 44baaa43d7cc ("staging: fsl-dpaa2/ethsw: Add Freescale DPAA2 Ethernet Switch driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
index daabaceeea52f..2edd82f5229ac 100644
--- a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
+++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
@@ -1047,6 +1047,9 @@ static int port_switchdev_event(struct notifier_block *unused,
 	struct ethsw_switchdev_event_work *switchdev_work;
 	struct switchdev_notifier_fdb_info *fdb_info = ptr;
 
+	if (!ethsw_port_dev_check(dev))
+		return NOTIFY_DONE;
+
 	switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
 	if (!switchdev_work)
 		return NOTIFY_BAD;