linux-kernel - Re: [PATCH] loop: Fix lost writes caused by missing flag

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]

Date:   Tue, 13 Feb 2018 12:52:22 -0800
From:   Dan Williams <dan.j.williams@...el.com>
To:     Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:     Christoph Hellwig <hch@....de>, stable@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>, linux-nvdimm@...ts.01.org
Subject: Re: [PATCH] loop: Fix lost writes caused by missing flag

On Tue, Feb 13, 2018 at 11:22 AM, Ross Zwisler
<ross.zwisler@...ux.intel.com> wrote:
> On Tue, Feb 13, 2018 at 03:54:04PM +0100, Christoph Hellwig wrote:
>> Looks good:
>>
>> Reviewed-by: Christoph Hellwig <hch@....de>
>>
>> Can you wire up your test cases for blktests?
>
> Is blktests really the right place for this test?  This failure is highly
> dependent on the configuration of the filesystem that is holding the file that
> we are using for the loopback device.  It doesn't seem like blktests has
> support for mount options (dax), etc?
>
> Because of the interaction with the underlying filesystem this seems like a
> better fit with xfstests to me, but I don't know if we need to add tests there
> because we already have pretty good coverage of loopback device failures.
> That's how we found this - this bug causes all these tests to fail:
> xfs/074 xfs/078 xfs/216 xfs/217 xfs/250

The problem is that those tests don't configure the device in 4K
sector mode, so we're still missing a regression test. That seems to
be where blktests can come into play.