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ARM: 8402/1: perf: Don't use of_node after putting it 

It's possible, albeit unlikely, that using the of_node here will
reference freed memory. Call of_node_put() after printing the
name to be safe.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Stephen Boyd 2015-07-07 18:17:05 +01:00 committed by Russell King
parent df9de3c429
commit 8e0c34b0d2
1 changed files with 2 additions and 1 deletions
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3
arch/arm/kernel/perf_event.c
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@ -818,12 +818,13 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu)
if (arch_find_n_match_cpu_physical_id(dn, cpu, NULL))
break;
of_node_put(dn);
if (cpu >= nr_cpu_ids) {
pr_warn("Failed to find logical CPU for %s\n",
dn->name);
of_node_put(dn);
break;
}
of_node_put(dn);
irqs[i] = cpu;
cpumask_set_cpu(cpu, &pmu->supported_cpus);