From: Brenden Blanco
Date: Sat, 3 Sep 2016 21:29:58 -0700
> Depending on the preempt mode, the bpf_prog stored in xdp_prog may be
> freed despite the use of call_rcu inside bpf_prog_put. The situation is
> possible when running in PREEMPT_RCU=y mode, for instance, since the rcu
> callback for de
Depending on the preempt mode, the bpf_prog stored in xdp_prog may be
freed despite the use of call_rcu inside bpf_prog_put. The situation is
possible when running in PREEMPT_RCU=y mode, for instance, since the rcu
callback for destroying the bpf prog can run even during the bh handling
in the mlx4
