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| author | Roopa Prabhu <roopa@cumulusnetworks.com> | 2015-01-29 03:23:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-27 04:48:48 +0300 |
| commit | b4faf21b76b2a0cf00e5a75e73efb22a09868b18 (patch) | |
| tree | 734e02603da6a2e10a31fe650251d66a20a351d2 /net/core | |
| parent | 650a7901c0fe0c3b0e5d9c1c945f140058585a6f (diff) | |
| download | linux-b4faf21b76b2a0cf00e5a75e73efb22a09868b18.tar.xz | |
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/core')
| -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 25c4dd563a79..279b5dcf09ae 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2477,12 +2477,16 @@ 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; } |