arm64: 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>
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 702591f..8af7784 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -1340,12 +1340,13 @@
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;
}