Nikolay Aleksandrov e085ae661a
net: ipv6: add fib6_nh_release_dsts stub ...
[ Upstream commit 8837cbbf854246f5f4d565f21e6baa945d37aded ]
We need a way to release a fib6_nh's per-cpu dsts when replacing
nexthops otherwise we can end up with stale per-cpu dsts which hold net
device references, so add a new IPv6 stub called fib6_nh_release_dsts.
It must be used after an RCU grace period, so no new dsts can be created
through a group's nexthop entry.
Similar to fib6_nh_release it shouldn't be used if fib6_nh_init has failed
so it doesn't need a dummy stub when IPv6 is not enabled.
Fixes: 7bf4796dd0nikolay@nvidia.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
Signed-off-by: Sasha Levin <sashal@kernel.org >
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