diff options
Diffstat (limited to 'net/core/lwt_bpf.c')
| -rw-r--r-- | net/core/lwt_bpf.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/net/core/lwt_bpf.c b/net/core/lwt_bpf.c index a648568c5e8f..4a5f4fbffd83 100644 --- a/net/core/lwt_bpf.c +++ b/net/core/lwt_bpf.c @@ -44,12 +44,11 @@ static int run_lwt_bpf(struct sk_buff *skb, struct bpf_lwt_prog *lwt, { int ret; - /* Preempt disable is needed to protect per-cpu redirect_info between - * BPF prog and skb_do_redirect(). The call_rcu in bpf_prog_put() and - * access to maps strictly require a rcu_read_lock() for protection, - * mixing with BH RCU lock doesn't work. + /* Preempt disable and BH disable are needed to protect per-cpu + * redirect_info between BPF prog and skb_do_redirect(). */ preempt_disable(); + local_bh_disable(); bpf_compute_data_pointers(skb); ret = bpf_prog_run_save_cb(lwt->prog, skb); @@ -82,6 +81,7 @@ static int run_lwt_bpf(struct sk_buff *skb, struct bpf_lwt_prog *lwt, break; } + local_bh_enable(); preempt_enable(); return ret; |