From: Cyrill Gorcunov <gorcunov@gmail.com>
Date: Thu, 11 Mar 2010 21:50:16 +0000 (+0300)
Subject: x86, perf: Fix NULL deref on not assigned x86_pmu
X-Git-Tag: v2.6.35-rc1~522^2~200^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b861225a5890f22445f08ca9cc7a87cff276ff7;p=pandora-kernel.git

x86, perf: Fix NULL deref on not assigned x86_pmu

In case of not assigned x86_pmu and software events NULL dereference may
being hit via x86_pmu::schedule_events method.

Fix it by checking if x86_pmu is initialized at all.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Lin Ming <ming.m.lin@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20100311215016.GG25162@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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