mm/mmap: Assert lock is held before running validate_mm()

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>

diff --git a/mm/mmap.c b/mm/mmap.c
index a6c9348d61cdb2bafac7fbabfba71a51c41ea8d2..61af80f654e42d86c4c552b4cab009f56e727dcd 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -312,6 +312,7 @@ static void validate_mm(struct mm_struct *mm)
        struct vm_area_struct *vma;
        MA_STATE(mas, &mm->mm_mt, 0, 0);
 
+       mmap_assert_locked(mm);
 
        mt_validate(&mm->mm_mt);
        mas_for_each(&mas, vma, ULONG_MAX) {