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@xxxxxxxxxxxxx>
---
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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