linux-kernel - Re: [v6.1.52][PATCH] Bluetooth: btsdio: fix use after free bug in btsdio

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: <2023090738-passive-snowless-3b9d@gregkh>
Date:   Thu, 7 Sep 2023 11:16:51 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Deepak Rathore <deeratho@...co.com>
Cc:     stable@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [v6.1.52][PATCH] Bluetooth: btsdio: fix use after free bug in
 btsdio_remove due to race condition

On Wed, Sep 06, 2023 at 05:45:25PM +0530, Deepak Rathore wrote:
> From: Zheng Wang <zyytlz.wz@....com>
> 
> [ Upstream commit 73f7b171b7c09139eb3c6a5677c200dc1be5f318 ]
> 
> In btsdio_probe, the data->work is bound with btsdio_work. It will be
> started in btsdio_send_frame.
> 
> If the btsdio_remove runs with a unfinished work, there may be a race
> condition that hdev is freed but used in btsdio_work. Fix it by
> canceling the work before do cleanup in btsdio_remove.
> 
> Signed-off-by: Zheng Wang <zyytlz.wz@....com>
> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
> Signed-off-by: Deepak Rathore <deeratho@...co.com>
> 

What tree(s) are you wanting this applied to?

thanks,

greg k-h