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| author | Minchan Kim <minchan.kim@gmail.com> | 2011-02-01 15:52:33 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-02-02 16:03:18 -0800 |
| commit | 48db54ee2f41e8ae2faf330b55db34a9fffb5b3c (patch) | |
| tree | 5cdf936bf6996e379784e0b75b982a364f437368 /mm/migrate.c | |
| parent | 57fc4a5ee322cde96c33f101d3c2d3b79011c05c (diff) | |
| download | lwn-48db54ee2f41e8ae2faf330b55db34a9fffb5b3c.tar.gz lwn-48db54ee2f41e8ae2faf330b55db34a9fffb5b3c.zip | |
mm/migration: fix page corruption during hugepage migration
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 <minchan.kim@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index 155a2e9a8059..766115253807 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -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; |