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SubjectRe: mm: BUG in resv_map_release
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On 03/28/2017 04:38 PM, Andrew Morton wrote:
> On Thu, 23 Mar 2017 11:19:38 +0100 Dmitry Vyukov <dvyukov@google.com> wrote:
>
>> Hello,
>>
>> I've got the following BUG while running syzkaller fuzzer.
>> Note the injected kmalloc failure, most likely it's the root cause.
>>
>
> Yes, probably the logic(?) in region_chg() leaked a
> resv->adds_in_progress++, although I'm not sure how. And afaict that
> code can leak the memory at *nrg if the `trg' allocation attempt failed
> on the second or later pass around the retry loop.
>
> Blah. Does someone want to take a look at it?

I sent out a patch to address this and Hillf Acked. Unfortunately,
there was a typo in your e-mail when I sent out the patch. So, you
may not have noticed.

[PATCH] mm/hugetlb: Don't call region_abort if region_chg fails
http://marc.info/?l=linux-mm&m=149033588500724&w=2

If you need/want me to send again, let me know.
--
Mike Kravetz

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