> Hi Vikas,
>
> A kernel bug report was opened against Ubuntu [0]. After a kernel
> bisect, it was found that reverting the following commit resolved this bug:
>
> commit 24247aeeabe99eab13b798ccccc2dec066dd6f07
> Author: Vikas Shivappa <email address hidden>
> Date: Tue Aug 15 18:00:43 2017 -0700
>
> x86/intel_rdt/cqm: Improve limbo list processing
>
>
> The regression was introduced as of v4.14-r1 and still exists with
> current mainline. The trace with v4.15-rc7 is in comment #44[1].
>
> I was hoping to get your feedback, since you are the patch author. Do
> you think gathering any additional data will help diagnose this issue,
> or would it be best to submit a revert request?
That stinks like a use after free. Can you run with KASAN enabled?
On Fri, 12 Jan 2018, Joseph Salisbury wrote:
> Hi Vikas, b13b798ccccc2de c066dd6f07
>
> A kernel bug report was opened against Ubuntu [0]. After a kernel
> bisect, it was found that reverting the following commit resolved this bug:
>
> commit 24247aeeabe99ea
> Author: Vikas Shivappa <email address hidden>
> Date: Tue Aug 15 18:00:43 2017 -0700
>
> x86/intel_rdt/cqm: Improve limbo list processing
>
>
> The regression was introduced as of v4.14-r1 and still exists with
> current mainline. The trace with v4.15-rc7 is in comment #44[1].
>
> I was hoping to get your feedback, since you are the patch author. Do
> you think gathering any additional data will help diagnose this issue,
> or would it be best to submit a revert request?
That stinks like a use after free. Can you run with KASAN enabled?
Thanks,
tglx