diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/events/core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 2d1e63dd97f2..011cc5069b7b 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -9920,13 +9920,16 @@ static void bpf_overflow_handler(struct perf_event *event, .data = data, .event = event, }; + struct bpf_prog *prog; int ret = 0; ctx.regs = perf_arch_bpf_user_pt_regs(regs); if (unlikely(__this_cpu_inc_return(bpf_prog_active) != 1)) goto out; rcu_read_lock(); - ret = bpf_prog_run(event->prog, &ctx); + prog = READ_ONCE(event->prog); + if (prog) + ret = bpf_prog_run(prog, &ctx); rcu_read_unlock(); out: __this_cpu_dec(bpf_prog_active); |