linux-kernel - Re: [Linux Kernel Bug][usb/f_printer] WARNING in usb_ep

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] [day] [month] [year] [list]

Message-ID: <1196d35e-46a0-4c96-8271-12becb932f06@suse.com>
Date: Wed, 13 Mar 2024 16:17:38 +0100
From: Oliver Neukum <oneukum@...e.com>
To: Chenyuan Yang <chenyuan0y@...il.com>, gregkh@...uxfoundation.org,
 azeemshaikh38@...il.com, ivan.orlov0322@...il.com,
 benjamin.tissoires@...hat.com, linux-usb@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, syzkaller@...glegroups.com,
 Zijie Zhao <zzjas98@...il.com>
Subject: Re: [Linux Kernel Bug][usb/f_printer] WARNING in usb_ep_queue

On 02.02.24 19:59, Chenyuan Yang wrote:
> Dear Linux Developers for F_printer,
> 
> We encountered "WARNING in usb_ep_queue" when testing the f_printer driver with
> Syzkaller and our generated specifications.
> 

Hi,

it is clear what happens, but at least to me it is not clear why we allow
a write() before we enable the endpoint. Anyway, does this fix the issue?

	Regards
		Oliver

View attachment "0001-usb-f_printer-sanity-check-in-write.patch" of type "text/x-patch" (3076 bytes)