route: check and remove route cache when we get route

route: check and remove route cache when we get route

Orabug: 23330958

[ Upstream commit deed49df7390d5239024199e249190328f1651e7 ]

Since the gc of ipv4 route was removed, the route cached would has
no chance to be removed, and even it has been timeout, it still could
be used, cause no code to check it's expires.

Fix this issue by checking  and removing route cache when we get route.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
(cherry picked from commit 1610a64d0c495cd84d848e5ff4e92f1f9f0ec6e5)

Signed-off-by: Dan Duval <dan.duval@oracle.com>