diff --git a/kernel/events/core.c b/kernel/events/core.c
index 2621fd24ad260b891d5ef2ed1571eacb30e5e5ef..ff4bffc502c677fc201353424d6ed9922c05380b 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6893,9 +6893,16 @@ static void perf_output_read_group(struct perf_output_handle *handle,
{
struct perf_event *leader = event->group_leader, *sub;
u64 read_format = event->attr.read_format;
+ unsigned long flags;
u64 values[6];
int n = 0;
+ /*
+ * Disabling interrupts avoids all counter scheduling
+ * (context switches, timer based rotation and IPIs).
+ */
+ local_irq_save(flags);
+
values[n++] = 1 + leader->nr_siblings;
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
@@ -6931,6 +6938,8 @@ static void perf_output_read_group(struct perf_output_handle *handle,
__output_copy(handle, values, n * sizeof(u64));
}
+
+ local_irq_restore(flags);
}
#define PERF_FORMAT_TOTAL_TIMES (PERF_FORMAT_TOTAL_TIME_ENABLED|\