Re: [PATCH v3 2/3] mmap: Fix error paths with dup_anon_vma()

[Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>]

On Tue, 3 Oct 2023 09:21:22 -0700 Suren Baghdasaryan <surenb@xxxxxxxxxx> wrote:

> > @@ -633,7 +641,7 @@ int vma_expand(struct vma_iterator *vmi, struct vm_area_struct *vma,
> >
> >                 remove_next = true;
> >                 vma_start_write(next);
> > -               ret = dup_anon_vma(vma, next);
> > +               ret = dup_anon_vma(vma, next, &anon_dup);
> >                 if (ret)
> >                         return ret;
> 
> Shouldn't the above be changed to a "goto nomem" instead of "return ret" ?

It looks OK to me as-is - dup_anon_vma() leaves anon_dup==NULL
when it returns error.