On 10/01, Robert Ho wrote:
>
> --- a/fs/proc/task_mmu.c
> +++ b/fs/proc/task_mmu.c
> @@ -147,7 +147,7 @@ m_next_vma(struct proc_maps_private *priv, struct vm_area_struct *vma)
> static void m_cache_vma(struct seq_file *m, struct vm_area_struct *vma)
> {
> if (m->count < m->size) /* vma is copied successfully */
> - m->version = m_next_vma(m->private, vma) ? vma->vm_start : -1UL;
> + m->version = m_next_vma(m->private, vma) ? vma->vm_end : -1UL;
> }
>
> static void *m_start(struct seq_file *m, loff_t *ppos)
> @@ -175,8 +175,10 @@ static void *m_start(struct seq_file *m, loff_t *ppos)
> priv->tail_vma = get_gate_vma(mm);
>
> if (last_addr) {
> - vma = find_vma(mm, last_addr);
> - if (vma && (vma = m_next_vma(priv, vma)))
> + vma = find_vma(mm, last_addr - 1);
> + if (vma && vma->vm_start <= last_addr)
> + vma = m_next_vma(priv, vma);
> + if (vma)
> return vma;
> }
Acked-by: Oleg Nesterov <oleg@xxxxxxxxxx>
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