From 264b5834d151f41cc70b515777fb1c3617e9a37a Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 2 Nov 2018 14:22:25 +0100
Subject: [PATCH] sched/topology: Fix off by one bug

References: git fixes
Patch-mainline: v4.20-rc1
Git-commit: 993f0b0510dad98b4e6e39506834dab0d13fd539

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: 051f3ca02e46 ("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>
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
 kernel/sched/topology.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 57b4afe6387a..76a3380de05b 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -1351,7 +1351,7 @@ 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;