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mm/migration: fix page corruption during hugepage migration

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If migrate_huge_page by memory-failure fails , it calls put_page in itself
to decrease page reference and caller of migrate_huge_page also calls
putback_lru_pages.  It can do double free of page so it can make page
corruption on page holder.

In addtion, clean of pages on caller is consistent behavior with
migrate_pages by cf608ac19c ("mm: compaction: fix COMPACTPAGEFAILED
counting").

Signed-off-by: Minchan Kim <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Minchan Kim 2011-02-01 15:52:33 -08:00 • committed by Linus Torvalds
commit 48db54ee2f
2 changed files with 4 additions and 5 deletions
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4
mm/migrate.c
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@ -980,10 +980,6 @@ int migrate_huge_pages(struct list_head *from,
}
rc = 0;
out:
list_for_each_entry_safe(page, page2, from, lru)
put_page(page);
if (rc)
return rc;