linux-kernel - Re: 5.14.0-rc1 KASAN use after free

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Message-Id: <FE6B2429-5846-4EE8-896A-691BD11C76D0@linaro.org>
Date:   Mon, 2 Aug 2021 16:21:20 +0200
From:   Paolo Valente <paolo.valente@...aro.org>
To:     jim.cromie@...il.com
Cc:     Jens Axboe <axboe@...nel.dk>,
        Oleksandr Natalenko <oleksandr@...alenko.name>,
        LKML <linux-kernel@...r.kernel.org>, linux-block@...r.kernel.org
Subject: Re: 5.14.0-rc1 KASAN use after free



> Il giorno 23 lug 2021, alle ore 15:08, jim.cromie@...il.com ha scritto:
> 
> On Sun, Jul 18, 2021 at 5:58 PM Jens Axboe <axboe@...nel.dk> wrote:
>> 
>> On 7/18/21 3:08 PM, Oleksandr Natalenko wrote:
>>> + Paolo, Jens et al.
>>> 
>>> On čtvrtek 15. července 2021 16:32:29 CEST jim.cromie@...il.com wrote:
>>>> hi all,
>>>> 
>>>> I noticed this report this morning, from 3 days ago,
>>>> about 10 minutes after boot.
>>>> Its easiest to ignore it, and I dont want to make a fuss,
>>>> but it looks useful to someone
>>>> 
>>>> 
>>>> [   33.663464] Bluetooth: RFCOMM ver 1.11
>>>> [  646.343628]
>>>> ================================================================== [
>>>> 646.343649] BUG: KASAN: use-after-free in bfq_get_queue+0x47d/0x900 [
>>>> 646.343680] Read of size 8 at addr ffff88810d864a00 by task
>>>> journal-offline/1639
>> 
>> There are only a few commits between 5.13 and master in this area, see
>> attached. I'd just start reverting from the top, one by one, and see
>> which one is causing the issue. Jim, would that be feasible?
>> 
> 
> oops, didn't see this earlier.
> It hasnt happened since, I can try to recreate mid-next-week
> 

Still nothing?

Thanks,
Paolo

> 
>> --
>> Jens Axboe