From: Eric Dumazet <[email protected]> Date: Tue, 30 Apr 2019 06:27:58 -0700
> Before taking a refcount on a rcu protected structure,
> we need to make sure the refcount is not zero.
>
> syzbot reported :
...
> Fixes: 54652eb12c1b ("l2tp: hold tunnel while looking up sessions in
> l2tp_netlink")
> Signed-off-by: Eric Dumazet <[email protected]>
> Reported-by: syzbot <[email protected]>
> Cc: Guillaume Nault <[email protected]>
Applied, thanks Eric.
