Commit 1f565a89 authored Feb 25, 2011 by David Rientjes Committed by Tejun Heo Feb 25, 2011

x86-64, NUMA: Fix size of numa_distance array



numa_distance should be sized like the SLIT, an NxN matrix where N is
the highest node id + 1.  This patch fixes the calculation to avoid
overflowing the array on the subsequent iteration.

-tj: The original patch used last index to calculate size.  Yinghai
     pointed out it should be incremented so it is the number of
     elements instead of the last index to calculate the size of the
     table.  Updated accordingly.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

parent d1b19426

arch/x86/mm/numa_64.c

+2 −1

Original line number	Original line	Diff line number	Diff line
	@@ -414,7 +414,8 @@ static int __init numa_alloc_distance(void)

	for_each_node_mask(i, nodes_parsed)		for_each_node_mask(i, nodes_parsed)
	cnt = i;		cnt = i;
	size = ++cnt * sizeof(numa_distance[0]);		cnt++;
			size = cnt * cnt * sizeof(numa_distance[0]);

	phys = memblock_find_in_range(0, (u64)max_pfn_mapped << PAGE_SHIFT,		phys = memblock_find_in_range(0, (u64)max_pfn_mapped << PAGE_SHIFT,
	size, PAGE_SIZE);		size, PAGE_SIZE);