From mboxrd@z Thu Jan 1 00:00:00 1970 From: Honggang Li Subject: [PATCH linux-next 3/4] macvlan: fix possible NULL pointer dereference in macvlan_dev_get_iflink Date: Tue, 14 Apr 2015 23:20:16 +0800 Message-ID: <1429024817-21561-4-git-send-email-honli@redhat.com> References: <1429024817-21561-1-git-send-email-honli@redhat.com> Cc: Honggang Li To: roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, kaber-dcUjhNyLwpNeoWH0uzbU5w@public.gmane.org, davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org, alex.estrin-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, edumazet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, erezsh-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, nicolas.dichtel-pdR9zngts4EAvxtiuMwx3w@public.gmane.org, maheshb-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, jbenc-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org, elfring-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org, andrew-g2DYL2Zd6BY@public.gmane.org, sfeldma-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, alexander.h.duyck-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Return-path: In-Reply-To: <1429024817-21561-1-git-send-email-honli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org Signed-off-by: Honggang Li --- drivers/net/macvlan.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index b227a13..1e59f39 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -998,7 +998,9 @@ static int macvlan_dev_get_iflink(const struct net_device *dev) { struct macvlan_dev *vlan = netdev_priv(dev); - return vlan->lowerdev->ifindex; + if (vlan && vlan->lowerdev) + return vlan->lowerdev->ifindex; + return 0; } static const struct ethtool_ops macvlan_ethtool_ops = { -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html