[PATCH 1/3] mmap: Fix vma_iterator in error path of vma_merge()

[Matthew Wilcox]

On Wed, Sep 27, 2023 at 12:07:44PM -0400, Liam R. Howlett wrote:
> +++ b/mm/mmap.c
> @@ -968,14 +968,14 @@ struct vm_area_struct *vma_merge(struct vma_iterator *vmi, struct mm_struct *mm,
>  				vma_pgoff = curr->vm_pgoff;
>  				vma_start_write(curr);
>  				remove = curr;
> -				err = dup_anon_vma(next, curr);
> +				err = dup_anon_vma(next, curr, &anon_dup);

This isn't bisectable.  dup_anon_vma() doesn't gain a third argument
until patch 2.