Re: [linux-next:master] [mm] bbcbf2a3f0: kernel_BUG_at_mm/memory.c

[David Hildenbrand]

On 21.12.23 12:23, Oliver Sang wrote:
> hi, Andrew Morton,
>
> On Wed, Dec 20, 2023 at 02:11:35PM -0800, Andrew Morton wrote:
> > On Tue, 19 Dec 2023 23:46:50 +0800 kernel test robot <oliver.sang@xxxxxxxxx> wrote:
> >
> > > Hello,
> > >
> > > kernel test robot noticed "kernel_BUG_at_mm/memory.c" on:
> > >
> > > commit: bbcbf2a3f05f74f9d268eab57abbdce6a65a94ad ("mm: convert ksm_might_need_to_copy() to work on folios")
> >
> > I assume this is a bisection result, so it's quite repeatable?
>
> yes, we bisect to this commit, it's quite repeatable:
>
> ddd06bb63d9793ce bbcbf2a3f05f74f9d268eab57ab
> ---------------- ---------------------------
>         fail:runs  %reproduction    fail:runs
>             |             |             |
>             :6          100%           6:6     dmesg.Kernel_panic-not_syncing:Fatal_exception
>             :6          100%           6:6     dmesg.RIP:do_swap_page
>             :6          100%           6:6     dmesg.invalid_opcode:#[##]
>             :6          100%           6:6     dmesg.kernel_BUG_at_mm/memory.c

Can you try with the snipped I sent? Please let me know if you need a 
full patch for testing purposes.

--
Cheers,

David / dhildenb