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authorWang Chen <wangchen@cn.fujitsu.com>2008-07-14 20:57:07 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-14 20:57:07 -0700
commitb89fb7da2f9a69dd34ff10d45f66baa40ff8c0e5 (patch)
tree420f1810c6d94fed581607078c75e895125f99ef /drivers/net/macvlan.c
parent7dc00c82cbb0119cf4663f65bbaa2cc55f961db2 (diff)
downloadblackbird-op-linux-b89fb7da2f9a69dd34ff10d45f66baa40ff8c0e5.tar.gz
blackbird-op-linux-b89fb7da2f9a69dd34ff10d45f66baa40ff8c0e5.zip
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 <wangchen@cn.fujitsu.com> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/macvlan.c')
-rw-r--r--drivers/net/macvlan.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index c02ceaa4a216..980001c2cf96 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)
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