[PATCH 4.20 013/127] net: clear skb->tstamp in bridge forwarding path

From: Greg Kroah-Hartman
Date: Thu Jan 24 2019 - 14:39:14 EST

4.20-stable review patch. If anyone has any objections, please let me know.


From: Paolo Abeni <pabeni@xxxxxxxxxx>

[ Upstream commit 41d1c8839e5f8cb781cc635f12791decee8271b7 ]

Matteo reported forwarding issues inside the linux bridge,
if the enslaved interfaces use the fq qdisc.

Similar to commit 8203e2d844d3 ("net: clear skb->tstamp in
forwarding paths"), we need to clear the tstamp field in
the bridge forwarding path.

Fixes: 80b14dee2bea ("net: Add a new socket option for a future transmit time.")
Fixes: fb420d5d91c1 ("tcp/fq: move back to CLOCK_MONOTONIC")
Reported-and-tested-by: Matteo Croce <mcroce@xxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Acked-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
Acked-by: Roopa Prabhu <roopa@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
net/bridge/br_forward.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -65,6 +65,7 @@ EXPORT_SYMBOL_GPL(br_dev_queue_push_xmit

int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
+ skb->tstamp = 0;
net, sk, skb, NULL, skb->dev,