]> git.baikalelectronics.ru Git - kernel.git/commit
USB: usblcd: fix I/O after disconnect
authorJohan Hovold <johan@kernel.org>
Thu, 26 Sep 2019 09:12:25 +0000 (11:12 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 4 Oct 2019 09:11:08 +0000 (11:11 +0200)
commitee501cf8d6bfa729b76e28403bcd2568a1bcb1a9
tree8321689dd45ec34034df33a2ef9e73a40105c1b4
parent2d2c19add812113fa43d8b8a11d350f21688dd24
USB: usblcd: fix I/O after disconnect

Make sure to stop all I/O on disconnect by adding a disconnected flag
which is used to prevent new I/O from being started and by stopping all
ongoing I/O before returning.

This also fixes a potential use-after-free on driver unbind in case the
driver data is freed before the completion handler has run.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org> # 08db185d4c41
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20190926091228.24634-7-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/misc/usblcd.c