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| author | Wang Chen <wangchen@cn.fujitsu.com> | 2008-07-14 20:59:03 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-07-14 20:59:03 -0700 |
| commit | 89146504cbfeb120dd08ec7f9f8314c4986189b8 (patch) | |
| tree | 7a271a017d3e622aa3a3459b3d1b0bbecd4bd9e6 /net/8021q/vlan_dev.c | |
| parent | b89fb7da2f9a69dd34ff10d45f66baa40ff8c0e5 (diff) | |
| download | lwn-89146504cbfeb120dd08ec7f9f8314c4986189b8.tar.gz lwn-89146504cbfeb120dd08ec7f9f8314c4986189b8.zip | |
8021q: Check return of dev_set_promiscuity/allmulti
dev_set_promiscuity/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 all positive increment for promiscuity and 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 'net/8021q/vlan_dev.c')
| -rw-r--r-- | net/8021q/vlan_dev.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index 8efa399823e3..9efd3c67c1db 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -518,19 +518,35 @@ static int vlan_dev_open(struct net_device *dev) if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN); if (err < 0) - return err; + goto out; } - memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); - if (dev->flags & IFF_ALLMULTI) - dev_set_allmulti(real_dev, 1); - if (dev->flags & IFF_PROMISC) - dev_set_promiscuity(real_dev, 1); + if (dev->flags & IFF_ALLMULTI) { + err = dev_set_allmulti(real_dev, 1); + if (err < 0) + goto del_unicast; + } + if (dev->flags & IFF_PROMISC) { + err = dev_set_promiscuity(real_dev, 1); + if (err < 0) + goto clear_allmulti; + } + + memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); if (vlan->flags & VLAN_FLAG_GVRP) vlan_gvrp_request_join(dev); return 0; + +clear_allmulti: + if (dev->flags & IFF_ALLMULTI) + dev_set_allmulti(real_dev, -1); +del_unicast: + if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) + dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); +out: + return err; } static int vlan_dev_stop(struct net_device *dev) |