linux-kernel - Re: [PATCH v2] ata: libata-scsi: Fix get identity data failed

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <f4ba7a92-1f00-c254-d196-7d21fe14dee2@kernel.org>
Date:   Sun, 7 May 2023 23:51:42 +0900
From:   Damien Le Moal <dlemoal@...nel.org>
To:     yangxingui <yangxingui@...wei.com>, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, john.g.garry@...cle.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxarm@...wei.com, prime.zeng@...ilicon.com,
        kangfenglong@...wei.com
Subject: Re: [PATCH v2] ata: libata-scsi: Fix get identity data failed

On 2023/05/05 18:06, yangxingui wrote:
> 
> 
> On 2023/5/5 16:17, Damien Le Moal wrote:
>> On 2023/05/05 11:57, Xingui Yang wrote:
>>> The function ata_get_identity() uses the helper ata_scsi_find_dev() to get
>>> the ata_device structure of a scsi device. However, when the ata device is
>>> managed by libsas, ata_scsi_find_dev() returns NULL, turning
>>> ata_get_identity() into a nop and always returns -ENOMSG.
>>
>> What do you do to hit the issue ? A while back for me it was the queue depth
>> setting causing problems. As Garry mentioned, this led to patch 141f3d6256e5
>> ("ata: libata-sata: Fix device queue depth control").
> Attempt to return the correct value at ata_scsi_find_dev() instead of 
> NULL, when the ata device is managed by libsas?

That I understand. My question is *what* user operation/command triggers this ?
Because on my test setup, under normal use, I do not see this issue (beside what
was already corrected with the queue depth control). Is the issue showing up
when using passthrough commands only ?


-- 
Damien Le Moal
Western Digital Research