linux-kernel - Re: [PATCH v7 4/7] selftests/proc: test PROCMAP_QUERY ioctl while vma is concurrently modified

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: <5e33a9b8-b0d9-4a5d-9b2c-280e3e64a70c@lucifer.local>
Date: Wed, 16 Jul 2025 11:39:58 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: David Hildenbrand <david@...hat.com>
Cc: Suren Baghdasaryan <surenb@...gle.com>, akpm@...ux-foundation.org,
        Liam.Howlett@...cle.com, vbabka@...e.cz, peterx@...hat.com,
        jannh@...gle.com, hannes@...xchg.org, mhocko@...nel.org,
        paulmck@...nel.org, shuah@...nel.org, adobriyan@...il.com,
        brauner@...nel.org, josef@...icpanda.com, yebin10@...wei.com,
        linux@...ssschuh.net, willy@...radead.org, osalvador@...e.de,
        andrii@...nel.org, ryan.roberts@....com, christophe.leroy@...roup.eu,
        tjmercier@...gle.com, kaleshsingh@...gle.com, aha310510@...il.com,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v7 4/7] selftests/proc: test PROCMAP_QUERY ioctl while
 vma is concurrently modified

On Wed, Jul 16, 2025 at 12:04:25PM +0200, David Hildenbrand wrote:
> On 16.07.25 05:05, Suren Baghdasaryan wrote:
> > Extend /proc/pid/maps tearing test to verify PROCMAP_QUERY ioctl operation
> > correctness while the vma is being concurrently modified.
> >
>
> Wonder if that should be moved out of this series as well. Of course, it
> doesn't hurt to have this test already in.

Yeah that's move this out actually, in this series it's not actually
testing anything _pertinent_.

Though all the tests are designed to pass _before_ as well as after
obviously, so (as David says) no harm to have it here BUT - it's confusing
and a bit weird :P

So yeah let's just move this test over to the respun procmap query series.

BTW Suren - slightly unrelated but - the syzbot report I did the analysis
on is super super reproducable, so if you want to play around with
different solutions, using that should make it some quick iterations.

>
> --
> Cheers,
>
> David / dhildenb
>

Cheers, Lorenzo