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-rw-r--r--kernel/events/core.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index b0c95f0f06fd..c46b02bfe179 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7458,7 +7458,19 @@ __perf_event_exit_task(struct perf_event *child_event,
struct perf_event_context *child_ctx,
struct task_struct *child)
{
- perf_remove_from_context(child_event, true);
+ /*
+ * Do not destroy the 'original' grouping; because of the context
+ * switch optimization the original events could've ended up in a
+ * random child task.
+ *
+ * If we were to destroy the original group, all group related
+ * operations would cease to function properly after this random
+ * child dies.
+ *
+ * Do destroy all inherited groups, we don't care about those
+ * and being thorough is better.
+ */
+ perf_remove_from_context(child_event, !!child_event->parent);
/*
* It can happen that the parent exits first, and has events