Re: [PATCH] udp6: fix UDP/IPv6 encap resubmit path

[David Miller]

From: Bill Sommerfeld <wsommerfeld@xxxxxxxxxx>
Date: Fri,  4 Mar 2016 14:47:21 -0800

> IPv4 interprets a negative return value from a protocol handler as a
> request to redispatch to a new protocol.  In contrast, IPv6 interprets a
> negative value as an error, and interprets a positive value as a request
> for redispatch.
> 
> UDP for IPv6 was unaware of this difference.  Change __udp6_lib_rcv() to
> return a positive value for redispatch.  Note that the socket's
> encap_rcv hook still needs to return a negative value to request
> dispatch, and in the case of IPv6 packets, adjust IP6CB(skb)->nhoff to
> identify the byte containing the next protocol.
> 
> Signed-off-by: Bill Sommerfeld <wsommerfeld@xxxxxxxxxx>

Applied and queued up for -stable, thanks.