From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx> 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 <Liam.Howlett@xxxxxxxxxx> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> --- mm/mmap.c | 1 + mm/vma.c | 5 ++++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/mmap.c b/mm/mmap.c index 548bc45a27bf..dce1cc74ecdb 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1796,6 +1796,7 @@ static int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma, vma_iter_store(vmi, vma); vma_complete(&vp, vmi, mm); + validate_mm(mm); khugepaged_enter_vma(vma, flags); goto out; } diff --git a/mm/vma.c b/mm/vma.c index 6d042cd46cdb..4e08c1654bdd 100644 --- a/mm/vma.c +++ b/mm/vma.c @@ -269,6 +269,7 @@ static int __split_vma(struct vma_iterator *vmi, struct vm_area_struct *vma, /* vma_complete stores the new vma */ vma_complete(&vp, vmi, vma->vm_mm); + validate_mm(vma->vm_mm); /* Success. */ if (new_below) @@ -548,6 +549,7 @@ int vma_expand(struct vma_iterator *vmi, struct vm_area_struct *vma, vma_iter_store(vmi, vma); vma_complete(&vp, vmi, vma->vm_mm); + validate_mm(vma->vm_mm); return 0; nomem: @@ -589,6 +591,7 @@ 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; } @@ -668,7 +671,6 @@ void vma_complete(struct vma_prepare *vp, } if (vp->insert && vp->file) uprobe_mmap(vp->insert); - validate_mm(mm); } /* @@ -1197,6 +1199,7 @@ static struct vm_area_struct } vma_complete(&vp, vmi, mm); + validate_mm(mm); khugepaged_enter_vma(res, vm_flags); return res; -- 2.43.0
