On Tue, 26 Jul 2022 15:37:16 +0530 Eric Dumazet <edumazet@xxxxxxxxxx> wrote: > Note: this is slightly racy. > > You are supposed to follow this order in this situation. > > 1) Clear the pointer > > Then: > > 2) wait an rcu grace period (synchronize_rcu()) or use call_rcu()/kfree_rcu(). > Noted. Due to rcu_dereference() used to get scan_req, null ptr dereference cannot happen. That had completely missed my eyes, sorry for that. I will send a v2. Thanks, Siddh
