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| author | Wang Chen <wangchen@cn.fujitsu.com> | 2008-07-14 20:57:07 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-07-14 20:57:07 -0700 |
| commit | b89fb7da2f9a69dd34ff10d45f66baa40ff8c0e5 (patch) | |
| tree | 420f1810c6d94fed581607078c75e895125f99ef | |
| parent | 7dc00c82cbb0119cf4663f65bbaa2cc55f961db2 (diff) | |
| download | linux-b89fb7da2f9a69dd34ff10d45f66baa40ff8c0e5.tar.gz linux-b89fb7da2f9a69dd34ff10d45f66baa40ff8c0e5.tar.bz2 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>
| -rw-r--r-- | drivers/net/macvlan.c | 14 |
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) |