linux-kernel - Re: usercopy whitelist woe in scsi_sense

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Message-ID: <20ba00cdfd1428aff13b7ea4cb42b03c@natalenko.name>
Date:   Mon, 09 Apr 2018 17:54:33 +0200
From:   Oleksandr Natalenko <oleksandr@...alenko.name>
To:     Christoph Hellwig <hch@....de>
Cc:     Kees Cook <keescook@...omium.org>,
        David Windsor <dave@...lcore.net>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Jens Axboe <axboe@...nel.dk>, Hannes Reinecke <hare@...e.com>,
        Johannes Thumshirn <jthumshirn@...e.de>,
        linux-block@...r.kernel.org, paolo.valente@...aro.org
Subject: Re: usercopy whitelist woe in scsi_sense_cache

Hi.

09.04.2018 11:35, Christoph Hellwig wrote:
> I really can't make sense of that report.

Sorry, I have nothing to add there so far, I just see the symptom of 
something going wrong in the ioctl code path that is invoked by 
smartctl, but I have no idea what's the minimal environment to reproduce 
it. I'll try to collect more info.

> And I'm also curious why
> you think 17cb960f29c2 should change anything for that code path.

Maybe, I've just mis-read that code.

Regards,
   Oleksandr