linux-kernel - [PATCH 0/6] USB: iowarrior: disconnect fixes and locking cleanups

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Message-Id: <20191009104846.5925-1-johan@kernel.org>
Date:   Wed,  9 Oct 2019 12:48:40 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Oliver Neukum <oneukum@...e.com>,
        Valentin Vidic <vvidic@...entin-vidic.from.hr>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan@...nel.org>
Subject: [PATCH 0/6] USB: iowarrior: disconnect fixes and locking cleanups

This series fixes a use-after-free bug introduced by a recent
disconnect-deadlock fix that was reported by syzbot. Turns out there was
already a related bug in the driver, and the first patch addresses both
issues.

While looking at the code I found two more use-after-free bugs, which
the next two patches fix.

The next two clean up the driver by dropping two redundant locks.

Tested using a mockup device.

Johan

Johan Hovold (6):
  USB: iowarrior: fix use-after-free on disconnect
  USB: iowarrior: fix use-after-free on release
  USB: iowarrior: fix use-after-free after driver unbind
  USB: iowarrior: drop redundant disconnect mutex
  USB: iowarrior: drop redundant iowarrior mutex
  USB: iowarrior: use pr_err()

 drivers/usb/misc/iowarrior.c | 48 +++++++++++-------------------------
 1 file changed, 15 insertions(+), 33 deletions(-)

-- 
2.23.0