sched/topology: Fix off by one bug

[ Upstream 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: Sasha Levin <sashal@kernel.org>

diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 9dcd80ed9d4c1ed95b7ce12c7401a48c96768e6a..867d173dab482f6a8ab869cec10cc649ec155c62 100644 (file)
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -1347,7 +1347,7 @@ 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;