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SubjectRe: [PATCH] mm/hmm: Fix bad subpage pointer in try_to_unmap_one
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On 7/9/19 5:28 PM, Andrew Morton wrote:
> On Tue, 9 Jul 2019 15:35:56 -0700 Ralph Campbell <rcampbell@nvidia.com> wrote:
>
>> When migrating a ZONE device private page from device memory to system
>> memory, the subpage pointer is initialized from a swap pte which computes
>> an invalid page pointer. A kernel panic results such as:
>>
>> BUG: unable to handle page fault for address: ffffea1fffffffc8
>>
>> Initialize subpage correctly before calling page_remove_rmap().
>
> I think this is
>
> Fixes: a5430dda8a3a1c ("mm/migrate: support un-addressable ZONE_DEVICE page in migration")
> Cc: stable
>
> yes?
>

Yes. Can you add this or should I send a v2?

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