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Commit5eb902b8e7("net/ipv6: Remove expired routes with a separated list of routes.") introduced a separated list for managing route expiration via the GC timer. However, it missed adding exception routes (created by ip6_rt_update_pmtu() and rt6_do_redirect()) to this GC list. As a result, these exceptions were never considered for expiration and removal, leading to stale entries persisting in the routing table. This patch fixes the issue by calling fib6_add_gc_list() in rt6_insert_exception(), ensuring that exception routes are properly tracked and garbage collected when expired. Fixes:5eb902b8e7("net/ipv6: Remove expired routes with a separated list of routes.") Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://patch.msgid.link/837e7506ffb63f47faa2b05d9b85481aad28e1a4.1744134377.git.lucien.xin@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>