On Wed, Jun 01, 2022 at 12:02:18PM -0700, Stanislav Fomichev wrote: > sk_priority & sk_mark are writable, the rest is readonly. > > One interesting thing here is that the verifier doesn't > really force me to add NULL checks anywhere :-/ Are you aware if it is possible to get a NULL sk from some of the bpf_lsm hooks ?