diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/events/core.c | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 050b4e399738..4886c0e97bbd 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -5761,21 +5761,6 @@ static void perf_log_throttle(struct perf_event *event, int enable) perf_output_end(&handle); } -static bool sample_is_allowed(struct perf_event *event, struct pt_regs *regs) -{ - /* - * Due to interrupt latency (AKA "skid"), we may enter the - * kernel before taking an overflow, even if the PMU is only - * counting user events. - * To avoid leaking information to userspace, we must always - * reject kernel samples when exclude_kernel is set. - */ - if (event->attr.exclude_kernel && !user_mode(regs)) - return false; - - return true; -} - /* * Generic event overflow handling, sampling. */ @@ -5823,12 +5808,6 @@ static int __perf_event_overflow(struct perf_event *event, } /* - * For security, drop the skid kernel samples if necessary. - */ - if (!sample_is_allowed(event, regs)) - return ret; - - /* * XXX event_limit might not quite work as expected on inherited * events */ |