sched/topology: Fix off by one bug

Peter Zijlstra · Ingo Molnar · commit 993f0b0510da · 2018-11-04T00:40:03.000+01:00
With the addition of the NUMA identity level, we increased @Level by one and will run off the end of the array in the distance sort loop. Fixed: 051f3ca ("sched/topology: Introduce NUMA identity node sched domain") Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
@@ -1337,7 +1337,7 @@ void sched_init_numa(void)
 	int level = 0;
 	int i, j, k;
 
-	sched_domains_numa_distance = kzalloc(sizeof(int) * nr_node_ids, GFP_KERNEL);
+	sched_domains_numa_distance = kzalloc(sizeof(int) * (nr_node_ids + 1), GFP_KERNEL);
 	if (!sched_domains_numa_distance)
 		return;
 
