linux-kernel - [REGRESSION][BISECTED] USB tethering broken after 67d1a8956d2d

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-next>] [day] [month] [year] [list]

Message-ID: <e0df2d85-1296-4317-b717-bd757e3ab928@heusel.eu>
Date: Wed, 16 Apr 2025 16:15:40 +0200
From: Christian Heusel <christian@...sel.eu>
To: ubomir Rintel <lkundrak@...sk>, Jakub Kicinski <kuba@...nel.org>
Cc: michal.pecio@...il.com, Andrew Lunn <andrew+netdev@...n.ch>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Paolo Abeni <pabeni@...hat.com>, linux-usb@...r.kernel.org, netdev@...r.kernel.org, 
	linux-kernel@...r.kernel.org, regressions@...ts.linux.dev
Subject: [REGRESSION][BISECTED] USB tethering broken after 67d1a8956d2d

Hello everyone,

I have recently noticed multiple issues popping up in the Arch Linux
Support fora and in the Gentoo bugtracker (see links below) where people
could not use USB tethering anymore after upgrading to 6.14.2.

Michał Pecio on the Kernel Bugzilla eyeballed the issue within the
mainline kernel tree to the following commit (that was backported to
stable):

    67d1a8956d2d ("rndis_host: Flag RNDIS modems as WWAN devices")

The error is still present in the latest mainline release 6.15-rc2 and
reverting the culprit on top of mainline fixes the issue.

Also the issue (as stated above) is already reported on the Kernel
Bugzilla but it seems like none of the actual developers has spotted it
yet, hence I'm amplifying it to the mailing lists.

I have attached a dmesg output from a good boot (6.15-rc2 with the patch
reverted) and one from where the failure occurs (regular 6.15-rc2). I'm
happy to test any debug patches or provide more information if needed.

Greeting,
Chris

---

#regzbot introduced: 67d1a8956d2d
#regzbot title: rndis_host: USB tethering broken
#regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=220002
#regzbot link: https://bugs.gentoo.org/953555
#regzbot link: https://bbs.archlinux.org/viewtopic.php?id=304892

Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)