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Commit 4c16128b authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
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net: loopback: clear skb->tstamp before netif_rx() 



At least UDP / TCP stacks can now cook skbs with a tstamp using
MONOTONIC base (or arbitrary values with SCM_TXTIME)

Since loopback driver does not call (directly or indirectly)
skb_scrub_packet(), we need to clear skb->tstamp so that
net_timestamp_check() can eventually resample the time,
using ktime_get_real().

Fixes: 80b14dee ("net: Add a new socket option for a future transmit time.")
Fixes: fb420d5d ("tcp/fq: move back to CLOCK_MONOTONIC")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: default avatarSoheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b5b4185c

drivers/net/loopback.c

+4 −0
Original line number Diff line number Diff line
@@ -69,6 +69,10 @@ static netdev_tx_t loopback_xmit(struct sk_buff *skb, 
	int len;



	skb_tx_timestamp(skb);



	/* do not fool net_timestamp_check() with various clock bases */

	skb->tstamp = 0;



	skb_orphan(skb);



	/* Before queueing this packet to netif_rx(),