Messages in this thread Patch in this message | | | From | Naoya Horiguchi <> | Subject | [PATCH 1/3] mm/pagewalk.c: fix end address calculation in walk_page_range() | Date | Wed, 26 Feb 2014 23:39:35 -0500 |
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When we try to walk over inside a vma, walk_page_range() tries to walk until vma->vm_end even if a given end is before that point. So this patch takes the smaller one as an end address.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> --- mm/pagewalk.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git next-20140220.orig/mm/pagewalk.c next-20140220/mm/pagewalk.c index 416e981243b1..b418407ff4da 100644 --- next-20140220.orig/mm/pagewalk.c +++ next-20140220/mm/pagewalk.c @@ -321,8 +321,9 @@ int walk_page_range(unsigned long start, unsigned long end, next = vma->vm_start; } else { /* inside the found vma */ walk->vma = vma; - next = vma->vm_end; - err = walk_page_test(start, end, walk); + next = min_t(unsigned long, end, vma->vm_end); + + err = walk_page_test(start, next, walk); if (skip_lower_level_walking(walk)) continue; if (err) -- 1.8.5.3
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