linux-kernel - Re: [PATCH 1/2] block: don't allow a disk link holder to itself

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: <faabea7a-b06b-1494-59ce-e06d0a7b2882@huaweicloud.com>
Date:   Thu, 3 Nov 2022 17:17:00 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     Christoph Hellwig <hch@....de>, Yu Kuai <yukuai1@...weicloud.com>
Cc:     axboe@...nel.dk, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, yi.zhang@...wei.com,
        "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH 1/2] block: don't allow a disk link holder to itself

Hi,

在 2022/11/03 16:06, Christoph Hellwig 写道:
> Yes, this is a good one.  Please add a single sentence blurb explaing
> the issue before the Test prodecure?
Ok, I'll do that.
> 
> With that this looks good:
> 
> Reviewed-by: Christoph Hellwig <hch@....de>
> 
> On Thu, Nov 03, 2022 at 10:55:40AM +0800, Yu Kuai wrote:
>> From: Yu Kuai <yukuai3@...wei.com>
>>
>> Test procedures:
>>
>> 1) dmsetup create test --table "xxx sda", assume dm-0 is created
>> 2) dmsetup suspend test
>> 3) dmsetup reload test --table "xxx dm-0"
>> 4) dmsetup resume test
> 
> Can you wire this up for blocktests?

Of course I can, I'm not very familiar with how to add new test in
blktests, so I might take some time to do that.
> 
> I've also been wondering how we could wire your other two test cases
> up as I think they'be very useful.  Hopefully I can find some time
> to inject delays with eBPF or something like it.

The problem was found without the delay originally, such delay can make
sure the problem is reproduced 100%, but it's still possible without the
delay. Perhaps we can add the test without delay for now.

Thanks,
Kuai
> 
> .
>