linux-kernel - Re: [REGRESSION] Chrome and VSCode breakage with the commit b9b588f22a0c

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: <263acb8f-2864-4165-90f7-6166e68180be@oracle.com>
Date: Wed, 26 Feb 2025 09:11:04 -0500
From: Chuck Lever <chuck.lever@...cle.com>
To: Takashi Iwai <tiwai@...e.de>
Cc: regressions@...ts.linux.dev, linux-fsdevel@...r.kernel.org,
        stable@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [REGRESSION] Chrome and VSCode breakage with the commit
 b9b588f22a0c

On 2/26/25 3:38 AM, Takashi Iwai wrote:
> On Sun, 23 Feb 2025 16:18:41 +0100,
> Chuck Lever wrote:
>>
>> On 2/23/25 3:53 AM, Takashi Iwai wrote:
>>> [ resent due to a wrong address for regression reporting, sorry! ]
>>>
>>> Hi,
>>>
>>> we received a bug report showing the regression on 6.13.1 kernel
>>> against 6.13.0.  The symptom is that Chrome and VSCode stopped working
>>> with Gnome Scaling, as reported on openSUSE Tumbleweed bug tracker
>>>   https://bugzilla.suse.com/show_bug.cgi?id=1236943
>>>
>>> Quoting from there:
>>> """
>>> I use the latest TW on Gnome with a 4K display and 150%
>>> scaling. Everything has been working fine, but recently both Chrome
>>> and VSCode (installed from official non-openSUSE channels) stopped
>>> working with Scaling.
>>> ....
>>> I am using VSCode with:
>>> `--enable-features=UseOzonePlatform --enable-features=WaylandWindowDecorations --ozone-platform-hint=auto` and for Chrome, I select `Preferred Ozone platform` == `Wayland`.
>>> """
>>>
>>> Surprisingly, the bisection pointed to the backport of the commit
>>> b9b588f22a0c049a14885399e27625635ae6ef91 ("libfs: Use d_children list
>>> to iterate simple_offset directories").
>>>
>>> Indeed, the revert of this patch on the latest 6.13.4 was confirmed to
>>> fix the issue.  Also, the reporter verified that the latest 6.14-rc
>>> release is still affected, too.
>>>
>>> For now I have no concrete idea how the patch could break the behavior
>>> of a graphical application like the above.  Let us know if you need
>>> something for debugging.  (Or at easiest, join to the bugzilla entry
>>> and ask there; or open another bug report at whatever you like.)
>>>
>>> BTW, I'll be traveling tomorrow, so my reply will be delayed.
>>>
>>>
>>> thanks,
>>>
>>> Takashi
>>>
>>> #regzbot introduced: b9b588f22a0c049a14885399e27625635ae6ef91
>>> #regzbot monitor: https://bugzilla.suse.com/show_bug.cgi?id=1236943
>>
>> We received a similar report a few days ago, and are likewise puzzled at
>> the commit result. Please report this issue to the Chrome development
>> team and have them come up with a simple reproducer that I can try in my
>> own lab. I'm sure they can quickly get to the bottom of the application
>> stack to identify the misbehaving interaction between OS and app.
> 
> Do you know where to report to?

You'll need to drive this, since you currently have a working
reproducer. You can report the issue here:

https://support.google.com/chrome/answer/95315?hl=en&co=GENIE.Platform%3DDesktop


> The reported stuff are no distro
> packages, and I myself have no experience with them, hence have no
> idea about the upstream development.
> If you have more clue about Chrome development, it'd be appreciated if
> you can report / ask from your side.  Of course, feel free to put me
> to Cc.


-- 
Chuck Lever