Fixes: 8ebe0a5eaaeb ("mm,madvise,hugetlb: fix unexpected data loss with MADV_DONTNEED on hugetlbfs")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Ricardo Cañuelo Navarro <rcn@xxxxxxxxxx>
---
mm/madvise.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/mm/madvise.c b/mm/madvise.c
index 49f3a75046f6..c8e28d51978a 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -933,7 +933,9 @@ static long madvise_dontneed_free(struct vm_area_struct *vma,
*/
end = vma->vm_end;
}
- VM_WARN_ON(start >= end);
+ if (start == end)
+ return 0;
+ VM_WARN_ON(start > end);
}
if (behavior == MADV_DONTNEED || behavior == MADV_DONTNEED_LOCKED)
--
2.48.1
