linux-kernel - About perf,arm -- oops in validate

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Date:	Tue, 20 Aug 2013 15:33:00 +0530 (IST)
From:	P J P <ppandit@...hat.com>
To:	linux-kernel@...r.kernel.org
cc:	vincent.weaver@...ne.edu
Subject: About perf,arm -- oops in validate_event

   Hello,

  -> https://lkml.org/lkml/2013/8/7/259

I wanted to confirm if this above fix should also go into ARM64 build Or is 
ARM64 platform not vulnerable?

===
$ git diff
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 9ba33c4..cbed82f 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -317,6 +317,9 @@ 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;
===


Thank you.
--
Prasad J Pandit / Red Hat Security Response Team
DB7A 84C5 D3F9 7CD1 B5EB  C939 D048 7860 3655 602B
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