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| author | Stephen Boyd <sboyd@codeaurora.org> | 2015-07-07 20:17:05 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-07-17 17:08:38 +0300 |
| commit | 8e0c34b0d268f10d84cb3f79f59c140d545a553a (patch) | |
| tree | 224645cb6eca4979c8737795a9c9826257bc0ac5 | |
| parent | df9de3c4295afa45d9c58c3d9039098af5765a21 (diff) | |
| download | linux-8e0c34b0d268f10d84cb3f79f59c140d545a553a.tar.xz | |
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>
| -rw-r--r-- | arch/arm/kernel/perf_event.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 357f57ea83f4..54272e0be713 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -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); |