On Sat, Jul 21, 2018 at 08:56:32PM -0700, Wei Wang wrote:
> From: Wei Wang <wei...@google.com>
>
> In the code path where only rcu read lock is held, e.g. in the route
> lookup code path, it is not safe to directly call fib6_info_hold()
> because the fib6_info may already have been deleted but still exists
> in the rcu grace period. Holding reference to it could cause double
> free and crash the kernel.
>
> This patch adds a new function fib6_info_hold_safe() and replace
> fib6_info_hold() in all necessary places.
Acked-by: Martin KaFai Lau <ka...@fb.com>
