arm64: perf: fix event validation for software group leaders

This is a port of c95eb31 ("ARM: 7809/1: perf: fix event validation for software group leaders") to arm64, which fixes a panic in the arm64 perf backend found as a result of Vince's fuzzing tool. Cc: <[email protected]> Signed-off-by: Will Deacon <[email protected]> Signed-off-by: Catalin Marinas <[email protected]>
kishon · Aug 20, 2013 · ee7538a · ee7538a
1 parent 868f6fe
commit ee7538a
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
@@ -322,6 +322,9 @@ validate_event(struct pmu_hw_events *hw_events,
 	struct hw_perf_event fake_event = event->hw;
 	struct pmu *leader_pmu = event->group_leader->pmu;
 
+	if (is_software_event(event))
+		return 1;
+
 	if (event->pmu != leader_pmu || event->state <= PERF_EVENT_STATE_OFF)
 		return 1;