netdev - Re: [PATCH v2] Bluetooth: add timeout sanity check to hci

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]

Date:   Thu, 19 Aug 2021 17:28:20 +0200
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Pavel Skripkin <paskripkin@...il.com>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        syzbot+be2baed593ea56c6a84c@...kaller.appspotmail.com
Subject: Re: [PATCH v2] Bluetooth: add timeout sanity check to hci_inquiry

Hi Pavel,

> Syzbot hit "task hung" bug in hci_req_sync(). The problem was in
> unreasonable huge inquiry timeout passed from userspace.
> Fix it by adding sanity check for timeout value to hci_inquiry().
> 
> Since hci_inquiry() is the only user of hci_req_sync() with user
> controlled timeout value, it makes sense to check timeout value in
> hci_inquiry() and don't touch hci_req_sync().
> 
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Reported-and-tested-by: syzbot+be2baed593ea56c6a84c@...kaller.appspotmail.com
> Signed-off-by: Pavel Skripkin <paskripkin@...il.com>
> ---
> 
> Changes in v2:
> 	Removed define + added comment suggested by Marcel
> 
> ---
> net/bluetooth/hci_core.c | 6 ++++++
> 1 file changed, 6 insertions(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel