From: Roopa Prabhu <roopa@xxxxxxxxxxxxxxxxxxx> 3.12-stable review patch. If anyone has any objections, please let me know. =============== [ 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: Jiri Slaby <jslaby@xxxxxxx> --- net/core/rtnetlink.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index f3224755b328..5874dfbb8d90 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2542,12 +2542,16 @@ 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; } -- 2.2.2 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html