From: Ido Schimmel <[email protected]>
Date: Tue, 21 Nov 2017 09:50:12 +0200
> When the 'ignore_routes_with_linkdown' sysctl is set, we should not
> consider linkdown nexthops during route lookup.
>
> While the code correctly verifies that the initially selected route
> ('match') has a carrier, it does not perform the same check in the
> subsequent multipath selection, resulting in a potential packet loss.
>
> In case the chosen route does not have a carrier and the sysctl is set,
> choose the initially selected route.
>
> Fixes: 35103d11173b ("net: ipv6 sysctl option to ignore routes when nexthop
> link is down")
> Signed-off-by: Ido Schimmel <[email protected]>
Applied.
