bpf: introduce bpf_perf_event_output() helper

[cascardo/linux.git] / kernel / bpf / verifier.c

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 1d6b97b..b56cf51 100644 (file)
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -245,6 +245,7 @@ static const struct {
 } func_limit[] = {
        {BPF_MAP_TYPE_PROG_ARRAY, BPF_FUNC_tail_call},
        {BPF_MAP_TYPE_PERF_EVENT_ARRAY, BPF_FUNC_perf_event_read},
+       {BPF_MAP_TYPE_PERF_EVENT_ARRAY, BPF_FUNC_perf_event_output},
 };
 
 static void print_verifier_state(struct verifier_env *env)
@@ -910,7 +911,7 @@ static int check_map_func_compatibility(struct bpf_map *map, int func_id)
                 * don't allow any other map type to be passed into
                 * the special func;
                 */
-               if (bool_map != bool_func)
+               if (bool_func && bool_map != bool_func)
                        return -EINVAL;
        }