From: Nicholas Piggin <npiggin@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Nicholas Piggin <npiggin@gmail.com>, Mel Gorman <mgorman@suse.de>,
Yang Shi <shy828301@gmail.com>,
linux-mm@kvack.org, Alexey Kardashevskiy <aik@ozlabs.ru>
Subject: [PATCH] mm/migrate: fix page state accounting type conversion underflow
Date: Thu, 22 Jul 2021 15:48:40 +1000 [thread overview]
Message-ID: <20210722054840.501423-1-npiggin@gmail.com> (raw)
Similarly to commit 2da9f6305f306 ("mm/vmscan: fix NR_ISOLATED_FILE
corruption on 64-bit"), fix -ve int -> unsigned int -> long bug.
Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Fixes: c5fc5c3ae0c84 ("mm: migrate: account THP NUMA migration counters correctly")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
mm/migrate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/migrate.c b/mm/migrate.c
index 34a9ad3e0a4f..7e240437e7d9 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2068,7 +2068,7 @@ int migrate_misplaced_page(struct page *page, struct vm_area_struct *vma,
LIST_HEAD(migratepages);
new_page_t *new;
bool compound;
- unsigned int nr_pages = thp_nr_pages(page);
+ int nr_pages = thp_nr_pages(page);
/*
* PTE mapped THP or HugeTLB page can't reach here so the page could
--
2.23.0
next reply other threads:[~2021-07-22 5:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-22 5:48 Nicholas Piggin [this message]
2021-07-22 7:27 ` [PATCH] mm/migrate: fix page state accounting type conversion underflow David Hildenbrand
2021-07-22 19:20 ` Andrew Morton
2021-07-26 1:43 ` Nicholas Piggin
2021-07-27 16:19 ` Matthew Wilcox
2021-07-28 14:15 ` Aneesh Kumar K.V
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