kernel/bpf/verifier.c

2952 			env->exception_callback_subprog = i;
12412 		if (!env->exception_callback_subprog) {
15999 	if (env->exception_callback_subprog && !ex_done) {
16000 		ex_insn_beg = env->subprog_info[env->exception_callback_subprog].start;
19516 	prog->aux->bpf_exception_cb = (void *)func[env->exception_callback_subprog]->bpf_func;
19808 	if (env->seen_exception && !env->exception_callback_subprog) {
19821 		env->exception_callback_subprog = env->subprog_cnt - 1;
19823 		mark_subprog_exc_cb(env, env->exception_callback_subprog);
20881 	if (env->exception_callback_subprog)
20882 		subprog_aux(env, env->exception_callback_subprog)->called = true;