Messages in this thread | | | Date | Tue, 31 Aug 2021 14:43:11 +0100 | From | Mel Gorman <> | Subject | Re: [PATCH 5/6] mm/page_alloc.c: avoid accessing uninitialized pcp page migratetype |
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On Mon, Aug 30, 2021 at 10:10:50PM +0800, Miaohe Lin wrote: > If it's not prepared to free unref page, the pcp page migratetype is > unset. Thus We will get rubbish from get_pcppage_migratetype() and > might list_del &page->lru again after it's already deleted from the > list leading to grumble about data corruption. > > Fixes: 3dcbe270d8ec ("mm/page_alloc: avoid conflating IRQs disabled with zone->lock") > Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
This fix is fairly important. Take this patch out and send it on its own so it gets picked up relatively quickly. It does not belong in a series that is mostly cosmetic cleanups.
-- Mel Gorman SUSE Labs
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