diff options
| -rw-r--r-- | kernel/bpf/verifier.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 797cf3ed32e0..0844b4383ff3 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -10620,11 +10620,26 @@ static int check_helper_call(struct bpf_verifier_env *env, struct bpf_insn *insn switch (func_id) { case BPF_FUNC_tail_call: + if (env->cur_state->active_lock.ptr) { + verbose(env, "tail_call cannot be used inside bpf_spin_lock-ed region\n"); + return -EINVAL; + } + err = check_reference_leak(env, false); if (err) { verbose(env, "tail_call would lead to reference leak\n"); return err; } + + if (env->cur_state->active_rcu_lock) { + verbose(env, "tail_call cannot be used inside bpf_rcu_read_lock-ed region\n"); + return -EINVAL; + } + + if (env->cur_state->active_preempt_lock) { + verbose(env, "tail_call cannot be used inside bpf_preempt_disable-ed region\n"); + return -EINVAL; + } break; case BPF_FUNC_get_local_storage: /* check that flags argument in get_local_storage(map, flags) is 0, |