From: Eric Dumazet <eric.duma...@gmail.com>
Date: Sat, 30 May 2015 09:16:53 -0700

> From: Eric Dumazet <eduma...@google.com>
> 
> We have two problems in UDP stack related to bogus checksums :
> 
> 1) We return -EAGAIN to application even if receive queue is not empty.
>    This breaks applications using edge trigger epoll()
> 
> 2) Under UDP flood, we can loop forever without yielding to other
>    processes, potentially hanging the host, especially on non SMP.
> 
> 
> This patch is an attempt to make things better.
> 
> We might in the future add extra support for rt applications
> wanting to better control time spent doing a recv() in a hostile
> environment. For example we could validate checksums before queuing
> packets in socket receive queue.
> 
> Signed-off-by: Eric Dumazet <eduma...@google.com>

Yeah this looks correct, applied and queued up for -stable.

Thanks!
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