From: Sabrina Dubroca <s...@queasysnail.net>
Date: Fri, 12 Oct 2018 16:22:47 +0200
> When commit 270972554c91 ("[IPV6]: ROUTE: Add Router Reachability
> Probing (RFC4191).") introduced router probing, the rt6_probe() function
> required that a neighbour entry existed. This neighbour entry is used to
> record the timestamp of the last probe via the ->updated field.
>
> Later, commit 2152caea7196 ("ipv6: Do not depend on rt->n in rt6_probe().")
> removed the requirement for a neighbour entry. Neighbourless routes skip
> the interval check and are not rate-limited.
>
> This patch adds rate-limiting for neighbourless routes, by recording the
> timestamp of the last probe in the fib6_info itself.
>
> Fixes: 2152caea7196 ("ipv6: Do not depend on rt->n in rt6_probe().")
> Signed-off-by: Sabrina Dubroca <s...@queasysnail.net>
> Reviewed-by: Stefano Brivio <sbri...@redhat.com>
Applied and queued up for -stable.
