mbind: add BUG_ON(!vma) in new_vma_page()
authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Wed, 11 Sep 2013 21:22:16 +0000 (14:22 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 11 Sep 2013 22:57:50 +0000 (15:57 -0700)
commit0bf598d863e3c741d47e3178d645f04c9d6c186c
tree4929a438298150fa92c800ac40c337d36531a70e
parent98094945785464c657d598291d714d11694c8cd9
mbind: add BUG_ON(!vma) in new_vma_page()

new_vma_page() is called only by page migration called from do_mbind(),
where pages to be migrated are queued into a pagelist by
queue_pages_range().  queue_pages_range() confirms that a queued page
belongs to some vma, so !vma case is not supposed to be happen.  This
patch adds BUG_ON() to catch this unexpected case.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/mempolicy.c