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>

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;