This is a note to let you know that I've just added the patch titled
bridge: dont send notification when skb->len == 0 in rtnl_bridge_notify
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bridge-dont-send-notification-when-skb-len-0-in-rtnl_bridge_notify.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Feb 12 09:25:54 HKT 2015
From: Roopa Prabhu <roopa@xxxxxxxxxxxxxxxxxxx>
Date: Wed, 28 Jan 2015 16:23:11 -0800
Subject: bridge: dont send notification when skb->len == 0 in rtnl_bridge_notify
From: Roopa Prabhu <roopa@xxxxxxxxxxxxxxxxxxx>
[ 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@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/core/rtnetlink.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2770,12 +2770,16 @@ static int rtnl_bridge_notify(struct net
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;
}
Patches currently in stable-queue which might be from roopa@xxxxxxxxxxxxxxxxxxx are
queue-3.18/bridge-dont-send-notification-when-skb-len-0-in-rtnl_bridge_notify.patch
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