From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
kernel-team@android.com, Lee Jones <lee@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Siwei Zhang <oss@fourdim.xyz>,
Luiz Augusto von Dentz <luiz.von.dentz@intel.com>,
Marco Elver <elver@google.com>, Todd Kjos <tkjos@google.com>
Subject: Re: [PATCH 6.1.y] Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref
Date: Thu, 6 Aug 2026 13:49:38 -0400 [thread overview]
Message-ID: <20260806131000.stable-0001@kernel.org> (raw)
In-Reply-To: <20260806005214.179730-1-tkjos@google.com>
On Thu, Aug 06, 2026 at 12:52:14AM +0000, Todd Kjos wrote:
> [ Upstream commit b66774b48dd98f07254951f74ea6f513efe7ff8b ]
>
> l2cap_chan_timeout() runs asynchronously and accesses chan->conn. If
> the connection is torn down while the timer is running or pending,
> chan->conn can be freed, leading to a use-after-free when the timer
> worker attempts to lock conn->lock:
Looks good. And I can also queue up d38eaf611839 ("Bluetooth: 6lowpan: Fix
using chan->conn as indication to no remote netdev") after the backport, but
your S-O-B is missing on the backport so we'll need it first :)
--
Thanks,
Sasha
next prev parent reply other threads:[~2026-08-06 17:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-06 0:52 [PATCH 6.1.y] Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref Todd Kjos
2026-08-06 17:49 ` Sasha Levin [this message]
2026-08-06 18:30 ` Todd Kjos
2026-08-07 11:45 ` Sasha Levin
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