Re: WARNING in wp_page_copy

[Dmitry Vyukov]

On Tue, Mar 24, 2020 at 3:47 AM syzbot
<syzbot+9301f2f33873407d5b33@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot suspects this bug was fixed by commit:
>
> commit c3e5ea6ee574ae5e845a40ac8198de1fb63bb3ab
> Author: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
> Date:   Fri Mar 6 06:28:32 2020 +0000
>
>     mm: avoid data corruption on CoW fault into PFN-mapped VMA
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1170c813e00000
> start commit:   e31736d9 Merge tag 'nios2-v5.5-rc2' of git://git.kernel.or..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=79f79de2a27d3e3d
> dashboard link: https://syzkaller.appspot.com/bug?extid=9301f2f33873407d5b33
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10fd9fb1e00000
>
> If the result looks correct, please mark the bug fixed by replying with:
>
> #syz fix: mm: avoid data corruption on CoW fault into PFN-mapped VMA
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

#syz fix: mm: avoid data corruption on CoW fault into PFN-mapped VMA