diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 93e06d370395384e7035a256c948fff7e7209bc1..b084fe1dbe1216d8b04ddd500b15e91ce6d0160b 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -2224,6 +2224,13 @@ void perf_event_detach_bpf_prog(struct perf_event *event) bpf_prog_array_free_sleepable(old_array); } + /* + * It could be that the bpf_prog is not sleepable (and will be freed + * via normal RCU), but is called from a point that supports sleepable + * programs and uses tasks-trace-RCU. + */ + synchronize_rcu_tasks_trace(); + bpf_prog_put(event->prog); event->prog = NULL;