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Message-Id: <1357530096-28548-1-git-send-email-linfeng@cn.fujitsu.com> Date: Mon, 7 Jan 2013 11:41:36 +0800 From: Lin Feng <linfeng@...fujitsu.com> To: akpm@...ux-foundation.org, tj@...nel.org Cc: mingo@...nel.org, yinghai@...nel.org, liwanp@...ux.vnet.ibm.com, benh@...nel.crashing.org, tangchen@...fujitsu.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org, Lin Feng <linfeng@...fujitsu.com> Subject: [PATCH v2] mm: memblock: fix wrong memmove size in memblock_merge_regions() The memmove span covers from (next+1) to the end of the array, and the index of next is (i+1), so the index of (next+1) is (i+2). So the size of remaining array elements is (type->cnt - (i + 2)). Cc: Tejun Heo <tj@...nel.org> Reviewed-by: Wanpeng Li <liwanp@...ux.vnet.ibm.com> Signed-off-by: Lin Feng <linfeng@...fujitsu.com> --- ChangeLog v1->v2: - Add a comment pointed out by Tejun. --- mm/memblock.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/memblock.c b/mm/memblock.c index 6259055..88adc8a 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -314,7 +314,8 @@ static void __init_memblock memblock_merge_regions(struct memblock_type *type) } this->size += next->size; - memmove(next, next + 1, (type->cnt - (i + 1)) * sizeof(*next)); + /* move forward from next + 1, index of which is i + 2 */ + memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); type->cnt--; } } -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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