From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Will Deacon , Catalin Marinas Subject: [ 46/74] arm64: perf: fix event validation for software group leaders Date: Mon, 26 Aug 2013 18:08:44 -0700 Message-Id: <20130827010434.246237578@linuxfoundation.org> In-Reply-To: <20130827010424.535365435@linuxfoundation.org> References: <20130827010424.535365435@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Will Deacon 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 Signed-off-by: Catalin Marinas Signed-off-by: Greg Kroah-Hartman --- arch/arm64/kernel/perf_event.c | 3 +++ 1 file changed, 3 insertions(+) --- 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_ 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;