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USB: quatech2: fix use-after-free in TIOCMIWAIT
authorJohan Hovold <jhovold@gmail.com>
Tue, 19 Mar 2013 08:21:23 +0000 (09:21 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 21 Mar 2013 22:59:05 +0000 (15:59 -0700)
commit69f87f40d2b98e8b4ab82a121fd2bd584690b887
tree51f4e310d5db5cd0bc727a2554f7c90bcba22c6ctree | snapshot
parent40509ca982c00c4b70fc00be887509feca0bff15commit | diff
USB: quatech2: fix use-after-free in TIOCMIWAIT

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.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/serial/quatech2.c diff | blob | blame | history
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