Commit c48c8c1e authored Nov 05, 2019 by Oleksij Rempel Committed by Marc Kleine-Budde Nov 13, 2019

can: j1939: main: j1939_ndev_to_priv(): avoid crash if can_ml_priv is NULL

This patch avoids a NULL pointer deref crash if ndev->ml_priv is NULL.

Reported-by: <syzbot+95c8e0d9dffde15b6c5c@syzkaller.appspotmail.com>
Fixes: 9d71dd0c ("can: add support of SAE J1939 protocol")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>

parent 25fe97cb

net/can/j1939/main.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -207,6 +207,9 @@ static inline struct j1939_priv j1939_ndev_to_priv(struct net_device ndev)
		{
		struct can_ml_priv *can_ml_priv = ndev->ml_priv;

		if (!can_ml_priv)
		return NULL;

		return can_ml_priv->j1939_priv;
		}