diff options
| author | Roopa Prabhu <roopa@cumulusnetworks.com> | 2015-01-28 16:23:11 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-01-28 22:21:31 -0800 |
| commit | 59ccaaaa49b5b096cdc1f16706a9f931416b2332 (patch) | |
| tree | 764a66a697481a65f8d16ab7277dede72642b187 | |
| parent | 95224ac1801cbfadc2c587be15fded69a13c4e3b (diff) | |
bridge: dont send notification when skb->len == 0 in rtnl_bridge_notify
Reported in: https://bugzilla.kernel.org/show_bug.cgi?id=92081
This patch avoids calling rtnl_notify if the device ndo_bridge_getlink
handler does not return any bytes in the skb.
Alternately, the skb->len check can be moved inside rtnl_notify.
For the bridge vlan case described in 92081, there is also a fix needed
in bridge driver to generate a proper notification. Will fix that in
subsequent patch.
v2: rebase patch on net tree
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/core/rtnetlink.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 9cf6fe9ddc0c..446cbaf81185 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2895,12 +2895,16 @@ static int rtnl_bridge_notify(struct net_device *dev, u16 flags) goto errout; } + if (!skb->len) + goto errout; + rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); return 0; errout: WARN_ON(err == -EMSGSIZE); kfree_skb(skb); - rtnl_set_sk_err(net, RTNLGRP_LINK, err); + if (err) + rtnl_set_sk_err(net, RTNLGRP_LINK, err); return err; } |