From: Jiri Pirko <j...@resnulli.us>
Date: Wed, 13 Sep 2017 17:32:37 +0200
> From: Jiri Pirko <j...@mellanox.com>
>
> Recent commit d7fb60b9cafb ("net_sched: get rid of tcfa_rcu") removed
> freeing in call_rcu, which changed already existing hard-to-hit
> race condition into 100% hit:
>
> [ 598.599825] BUG: unable to handle kernel NULL pointer dereference at
> 0000000000000030
> [ 598.607782] IP: tcf_action_destroy+0xc0/0x140
>
> Or:
>
> [ 40.858924] BUG: unable to handle kernel NULL pointer dereference at
> 0000000000000030
> [ 40.862840] IP: tcf_generic_walker+0x534/0x820
>
> Fix this by storing the ops and use them directly for module_put call.
>
> Fixes: a85a970af265 ("net_sched: move tc_action into tcf_common")
> Signed-off-by: Jiri Pirko <j...@mellanox.com>
Applied, thanks Jiri.
