linux-kernel - Re: paride/pf.c: blk-mq use-after-free (kernel v5.0)

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Message-ID: <4a2adc33-ef38-6a5f-65ee-8fcfaa0948a9@infradead.org>
Date:   Thu, 14 Mar 2019 16:49:28 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Jens Axboe <axboe@...nel.dk>,
        linux-block <linux-block@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, Tim Waugh <tim@...erelk.net>,
        linux-parport@...ts.infradead.org
Subject: Re: paride/pf.c: blk-mq use-after-free (kernel v5.0)

On 3/14/19 4:43 PM, Jens Axboe wrote:
> On 3/13/19 5:09 PM, Randy Dunlap wrote:
>> On 3/11/19 6:34 PM, Randy Dunlap wrote:
>>> On 3/11/19 6:25 PM, Randy Dunlap wrote:
>>>> [Has this already been addressed/fixed?]>>
>>>
>>> Same bug occurs with paride/pcd.c driver.
>>
>> This still happens (in blk-mq) in v5.0-11053-gebc551f2b8f9 of Mar. 12, 2019,
>> around 4pm PT.  [caused by paride: pf.c and pcd.c)
> 
> I'll take a look at this, been busy with other stuff. How are you
> reproducing this? I'm assuming you don't actually have any hardware :-)

Right.  I just load the module (pf or pcd), unload it, and
then load it again.

-- 
~Randy