diff options
| author | Roopa Prabhu <roopa@cumulusnetworks.com> | 2015-01-28 16:23:11 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-26 17:50:12 -0800 |
| commit | 58a07b8e5a1eae96eef6e14d544a71698afc52b2 (patch) | |
| tree | f19271f9ab917629ad85b8e6f3a0a8d5f9427162 /net | |
| parent | 498715877b462fc37631699b4a9d32886d7e17f4 (diff) | |
bridge: dont send notification when skb->len == 0 in rtnl_bridge_notify
[ Upstream commit 59ccaaaa49b5b096cdc1f16706a9f931416b2332 ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '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 46175866851e..a6613ff972c1 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2649,12 +2649,16 @@ 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; } |