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macvlan: Check return of dev_set_allmulti

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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 <wangchen@cn.fujitsu.com>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wang Chen 2008-07-14 20:57:07 -07:00 committed by David S. Miller
parent 7dc00c82cb
commit b89fb7da2f
1 changed files with 11 additions and 3 deletions
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14
drivers/net/macvlan.c
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@ -189,12 +189,20 @@ static int macvlan_open(struct net_device *dev)
err = dev_unicast_add(lowerdev, dev->dev_addr, ETH_ALEN); err = dev_unicast_add(lowerdev, dev->dev_addr, ETH_ALEN);
if (err < 0) if (err < 0)
return err; goto out;
if (dev->flags & IFF_ALLMULTI) if (dev->flags & IFF_ALLMULTI) {
dev_set_allmulti(lowerdev, 1); 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]]); hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[dev->dev_addr[5]]);
return 0; return 0;
del_unicast:
dev_unicast_delete(lowerdev, dev->dev_addr, ETH_ALEN);
out:
return err;
} }
static int macvlan_stop(struct net_device *dev) static int macvlan_stop(struct net_device *dev)