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Howlett" To: linux-mm@kvack.org, Andrew Morton Cc: Suren Baghdasaryan , Vlastimil Babka , Lorenzo Stoakes , Matthew Wilcox , sidhartha.kumar@oracle.com, "Paul E . McKenney" , Bert Karwatzki , Jiri Olsa , linux-kernel@vger.kernel.org, Kees Cook , Jeff Xu , "Liam R. 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charset="utf-8" vma_complete() will need to be called during an unsafe time to call validate_mm(). Extract the call in all places now so that only one location can be modified in the next change. Signed-off-by: Liam R. Howlett Reviewed-by: Lorenzo Stoakes --- mm/mmap.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/mmap.c b/mm/mmap.c index 62ff7aa10004..1c9016fb6b5c 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -646,7 +646,6 @@ static inline void vma_complete(struct vma_prepare *vp, } if (vp->insert && vp->file) uprobe_mmap(vp->insert); - validate_mm(mm); } =20 /* @@ -734,6 +733,7 @@ int vma_expand(struct vma_iterator *vmi, struct vm_area= _struct *vma, vma_iter_store(vmi, vma); =20 vma_complete(&vp, vmi, vma->vm_mm); + validate_mm(vma->vm_mm); return 0; =20 nomem: @@ -775,6 +775,7 @@ int vma_shrink(struct vma_iterator *vmi, struct vm_area= _struct *vma, vma_iter_clear(vmi); vma_set_range(vma, start, end, pgoff); vma_complete(&vp, vmi, vma->vm_mm); + validate_mm(vma->vm_mm); return 0; } =20 @@ -1103,6 +1104,7 @@ static struct vm_area_struct } =20 vma_complete(&vp, vmi, mm); + validate_mm(mm); khugepaged_enter_vma(res, vm_flags); return res; =20 @@ -2481,6 +2483,7 @@ static int __split_vma(struct vma_iterator *vmi, stru= ct vm_area_struct *vma, =20 /* vma_complete stores the new vma */ vma_complete(&vp, vmi, vma->vm_mm); + validate_mm(vma->vm_mm); =20 /* Success. */ if (new_below) @@ -3354,6 +3357,7 @@ static int do_brk_flags(struct vma_iterator *vmi, str= uct vm_area_struct *vma, vma_iter_store(vmi, vma); =20 vma_complete(&vp, vmi, mm); + validate_mm(mm); khugepaged_enter_vma(vma, flags); goto out; } --=20 2.43.0