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Johan Hovold 468fcdfaeb Bluetooth: btusb: fix use-after-free on registration failure
commit eedc6867eb upstream.

Make sure to release the sibling interfaces in case controller
registration fails to avoid use-after-free and double-free when they are
eventually disconnected.

This issue was reported by Sashiko while reviewing a fix for a wakeup
source leak in the btusb probe errors paths.

Link: https://sashiko.dev/#/patchset/20260402092704.2346710-1-johan%40kernel.org
Fixes: 9bfa35fe42 ("[Bluetooth] Add SCO support to btusb driver")
Fixes: 9d08f50401 ("Bluetooth: btusb: Add support for Broadcom LM_DIAG interface")
Cc: stable@vger.kernel.org	# 2.6.27
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-07-24 15:51:19 +02:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.