diff options
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/bpf_trace.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 9df53c40cffd..b05f0310dbd3 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -2222,9 +2222,15 @@ static __always_inline void __bpf_trace_run(struct bpf_prog *prog, u64 *args) { cant_sleep(); + if (unlikely(this_cpu_inc_return(*(prog->active)) != 1)) { + bpf_prog_inc_misses_counter(prog); + goto out; + } rcu_read_lock(); (void) bpf_prog_run(prog, args); rcu_read_unlock(); +out: + this_cpu_dec(*(prog->active)); } #define UNPACK(...) __VA_ARGS__ |