The patch titled
Subject: mm: fix overflow in find_zone_movable_pfns_for_nodes()
has been added to the -mm tree. Its filename is
mm-fix-overflow-in-find_zone_movable_pfns_for_nodes.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-fix-overflow-in-find_zone_movable_pfns_for_nodes.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-fix-overflow-in-find_zone_movable_pfns_for_nodes.patch
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------------------------------------------------------
From: Xishi Qiu <qiuxishi@xxxxxxxxxx>
Subject: mm: fix overflow in find_zone_movable_pfns_for_nodes()
If the user set "movablecore=xx" to a large number, corepages will
overflow. Fix the problem.
Signed-off-by: Xishi Qiu <qiuxishi@xxxxxxxxxx>
Acked-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Cc: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 1 +
1 file changed, 1 insertion(+)
diff -puN mm/page_alloc.c~mm-fix-overflow-in-find_zone_movable_pfns_for_nodes mm/page_alloc.c
--- a/mm/page_alloc.c~mm-fix-overflow-in-find_zone_movable_pfns_for_nodes
+++ a/mm/page_alloc.c
@@ -5485,6 +5485,7 @@ static void __init find_zone_movable_pfn
*/
required_movablecore =
roundup(required_movablecore, MAX_ORDER_NR_PAGES);
+ required_movablecore = min(totalpages, required_movablecore);
corepages = totalpages - required_movablecore;
required_kernelcore = max(required_kernelcore, corepages);
_
Patches currently in -mm which might be from qiuxishi@xxxxxxxxxx are
mm-fix-overflow-in-find_zone_movable_pfns_for_nodes.patch
kasan-use-is_aligned-in-memory_is_poisoned_8.patch
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