linux-kernel - Re: [PATCH] Fix use after free access in at76

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: <c9185d57-0c01-4f8b-80a9-dbdf5062586a@web.de>
Date: Sun, 30 Mar 2025 13:53:11 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: Abdun Nihaal <abdun.nihaal@...il.com>, linux-wireless@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org,
 Johannes Berg <johannes@...solutions.net>
Cc: LKML <linux-kernel@...r.kernel.org>,
 Alexandre Belloni <alexandre.belloni@...tlin.com>,
 Alexey Khoroshilov <khoroshilov@...ras.ru>,
 Claudiu Beznea <claudiu.beznea@...on.dev>,
 Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
 Erick Archer <erick.archer@...look.com>,
 "John W. Linville" <linville@...driver.com>, Kalle Valo <kvalo@...nel.org>,
 Miri Korenblit <miriam.rachel.korenblit@...el.com>,
 Nicolas Ferre <nicolas.ferre@...rochip.com>
Subject: Re: [PATCH] Fix use after free access in at76_disconnect

> The memory pointed to by priv is freed at the end of at76_delete_device
> function (using ieee80211_free_hw). But the code then accesses the udev
> field of the freed object to put the USB device. This may also lead to a
> memory leak of the usb device. Fix this by using udev from interface.

* A corresponding subsystem specification can usually be helpful here.
  https://web.git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/log/drivers/net/wireless/atmel/at76c50x-usb.c?h=next-20250328

* Would you like to append parentheses to any function names?

Regards,
Markus