Subject: Re: [Bug 202149] New: NULL Pointer Dereference in __split_huge_pmd on PPC64LE

From: "Aneesh Kumar K.V" <[email-masked]>
Date: Tue, 08 Jan 2019 12:45:08 +0530

Andrew Morton <[email-masked]> writes:

> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
>
> On Fri, 04 Jan 2019 22:49:52 +0000 [email-masked] wrote:
>
>> https://bugzilla.kernel.org/show_bug.cgi?id=202149
>> 
>>             Bug ID: 202149
>>            Summary: NULL Pointer Dereference in __split_huge_pmd on
>>                     PPC64LE
>
> I think that trace is pointing at the ppc-specific
> pgtable_trans_huge_withdraw()?
>

That is correct. 

Matt,
Can you share the .config used for the kernel. Does this happen only
with 4K page size ?

-aneesh