netdev - Re: [PATCH] Bluetooth: Fix null pointer dereference in l2cap_chan

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]

Date:	Mon, 21 May 2012 13:17:07 -0300
From:	Gustavo Padovan <gustavo@...ovan.org>
To:	Minho Ban <mhban@...sung.com>
Cc:	Marcel Holtmann <marcel@...tmann.org>,
	Johan Hedberg <johan.hedberg@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Bluetooth: Fix null pointer dereference in
 l2cap_chan_send

Hi Minho,

* Minho Ban <mhban@...sung.com> [2012-05-21 09:58:19 +0900]:

> If l2cap_chan_send is called will null conn it will cause kernel Oops.
> This patch checks if conn is valid before entering l2cap_chan_send.

chan->conn should be always valid, and if not we have a bug somewhere else in
the code and not in l2cap_chan_send(). It could be a locking problem maybe.
Also check if you can reproduce this with latest bluetooth-next.

	Gustavo
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html