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-rw-r--r--mm/msync.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/msync.c b/mm/msync.c
index a5c673669ca6..992a1673d488 100644
--- a/mm/msync.c
+++ b/mm/msync.c
@@ -78,7 +78,8 @@ SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags)
goto out_unlock;
}
file = vma->vm_file;
- fstart = start + ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
+ fstart = (start - vma->vm_start) +
+ ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
fend = fstart + (min(end, vma->vm_end) - start) - 1;
start = vma->vm_end;
if ((flags & MS_SYNC) && file &&

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