release_reference
err = release_reference(env, reg->id);
static int release_reference(struct bpf_verifier_env *env, int id);
return release_reference(env, dynptr_type_referenced(reg->dynptr.type)
err = release_reference(env, state->stack[spi].spilled_ptr.id);
WARN_ON_ONCE(release_reference(env, st->id));