Re: "reuse mergeable anon_vma as parent when fork" causes a crash on s390

[Andrew Morton]

On Wed, 9 Oct 2019 15:21:11 -0700 Shakeel Butt <shakeelb@xxxxxxxxxx> wrote:

> On Wed, Oct 9, 2019 at 2:30 PM Qian Cai <cai@xxxxxx> wrote:
> >
> > The linux-next commit "mm/rmap.c: reuse mergeable anon_vma as parent when fork"
> > [1] causes a crash on s390 while compiling some C code. Reverted it fixes the
> > issue.
> >
> > [1] https://lore.kernel.org/lkml/20191004160632.30251-1-richardw.yang@xxxxxxxxxxxxxxx/
> >
>
> ...
>
> Our internal syzbot instance also hit this bug and bisected to the same patch.

Thanks, I'll drop
mm-rmapc-reuse-mergeable-anon_vma-as-parent-when-fork.patch.