diff options
| author | Will Deacon <will.deacon@arm.com> | 2013-08-20 11:47:40 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-29 09:47:36 -0700 |
| commit | 6c6f6c7166e9ee45e545eab850a2862a92c135b2 (patch) | |
| tree | 55180c88bdbf263ffc0353b801561c7af4bfc3c4 | |
| parent | 975a3cd4cc0dff06a635cb16b8fb25fd3ae88234 (diff) | |
arm64: perf: fix event validation for software group leaders
commit ee7538a008a45050c8f706d38b600f55953169f9 upstream.
This is a port of c95eb3184ea1 ("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.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/arm64/kernel/perf_event.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index 2012646fb46..12e6ccb8869 100644 --- 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; |