From b89fb7da2f9a69dd34ff10d45f66baa40ff8c0e5 Mon Sep 17 00:00:00 2001 From: Wang Chen Date: Mon, 14 Jul 2008 20:57:07 -0700 Subject: [PATCH] macvlan: Check return of dev_set_allmulti allmulti might overflow. Commit: "netdevice: Fix promiscuity and allmulti overflow" in net-next makes dev_set_promiscuity/allmulti return error number if overflow happened. Here, we check the positive increment for allmulti to get error return. Signed-off-by: Wang Chen Acked-by: Patrick McHardy Signed-off-by: David S. Miller --- drivers/net/macvlan.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index c02ceaa4a2..980001c2cf 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -189,12 +189,20 @@ static int macvlan_open(struct net_device *dev) err = dev_unicast_add(lowerdev, dev->dev_addr, ETH_ALEN); if (err < 0) - return err; - if (dev->flags & IFF_ALLMULTI) - dev_set_allmulti(lowerdev, 1); + goto out; + if (dev->flags & IFF_ALLMULTI) { + err = dev_set_allmulti(lowerdev, 1); + if (err < 0) + goto del_unicast; + } hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[dev->dev_addr[5]]); return 0; + +del_unicast: + dev_unicast_delete(lowerdev, dev->dev_addr, ETH_ALEN); +out: + return err; } static int macvlan_stop(struct net_device *dev) -- 2.39.5