From: Xin Long <lucien....@gmail.com>
Date: Sun, 5 Aug 2018 22:46:07 +0800
> According to RFC791, 68 bytes is the minimum size of IPv4 datagram every
> device must be able to forward without further fragmentation while 576
> bytes is the minimum size of IPv4 datagram every device has to be able
> to receive, so in ip6_tnl_xmit(), 68(IPV4_MIN_MTU) should be the right
> value for the ipv4 min mtu check in ip6_tnl_xmit.
>
> While at it, change to use max() instead of if statement.
>
> Fixes: c9fefa08190f ("ip6_tunnel: get the min mtu properly in ip6_tnl_xmit")
> Reported-by: Sabrina Dubroca <s...@queasysnail.net>
> Signed-off-by: Xin Long <lucien....@gmail.com>
Applied and queued up for -stable, thanks Xin.
