USB: mct_u232: fix use-after-free in TIOCMIWAIT
authorJohan Hovold <jhovold@gmail.com>
Tue, 19 Mar 2013 08:21:18 +0000 (09:21 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 5 Apr 2013 16:26:05 +0000 (09:26 -0700)
commite86d3027d5483a290ba483a2a63cb22963efe01e
treed7b78a01329c2be5540d8fb7778fd911c4410d0c
parent74b63618655dc8fa4bb58f88e0b857cee86a71ae
USB: mct_u232: fix use-after-free in TIOCMIWAIT

commit cf1d24443677a0758cfa88ca40f24858b89261c0 upstream.

Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.

This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/serial/mct_u232.c