USB: serial: io_ti: fix NULL-deref at open
commit
a323fefc6f5079844dc62ffeb54f491d0242ca35 upstream.
Fix NULL-pointer dereference when clearing halt at open should a
malicious device lack the expected endpoints when in download mode.
Unable to handle kernel NULL pointer dereference at virtual address
00000030
...
[<
bf011ed8>] (edge_open [io_ti]) from [<
bf000118>] (serial_port_activate+0x68/0x98 [usbserial])
[<
bf000118>] (serial_port_activate [usbserial]) from [<
c0470ca4>] (tty_port_open+0x9c/0xe8)
[<
c0470ca4>] (tty_port_open) from [<
bf000da0>] (serial_open+0x48/0x6c [usbserial])
[<
bf000da0>] (serial_open [usbserial]) from [<
c0469178>] (tty_open+0xcc/0x5cc)
Fixes:
1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>