From: Paolo Abeni <pab...@redhat.com>
Date: Mon, 25 Mar 2019 14:18:06 +0100
> Christoph reported a stall while peeking datagram with an offset when
> busy polling is enabled. __skb_try_recv_datagram() uses as the loop
> termination condition 'queue empty'. When peeking, the socket
> queue can be not empty, even when no additional packets are received.
>
> Address the issue explicitly checking for receive queue changes,
> as currently done by __skb_wait_for_more_packets().
>
> Fixes: 2b5cd0dfa384 ("net: Change return type of sk_busy_loop from bool to
> void")
> Reported-and-tested-by: Christoph Paasch <cpaa...@apple.com>
> Signed-off-by: Paolo Abeni <pab...@redhat.com>
Applied and queued up for -stable, thanks Paolo.
