diff options
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index ab260260a626..14779c4f9a60 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1303,6 +1303,16 @@ static int unmap_and_move_huge_page(new_page_t get_new_page, lock_page(hpage); } + /* + * Check for pages which are in the process of being freed. Without + * page_mapping() set, hugetlbfs specific move page routine will not + * be called and we could leak usage counts for subpools. + */ + if (page_private(hpage) && !page_mapping(hpage)) { + rc = -EBUSY; + goto out_unlock; + } + if (PageAnon(hpage)) anon_vma = page_get_anon_vma(hpage); @@ -1333,6 +1343,7 @@ put_anon: put_new_page = NULL; } +out_unlock: unlock_page(hpage); out: if (rc != -EAGAIN) |