USB: ftdi_sio: fix null deref at port probe
authorJohan Hovold <johan@kernel.org>
Thu, 5 Jun 2014 14:05:52 +0000 (16:05 +0200)
committerJohan Hovold <johan@kernel.org>
Mon, 23 Jun 2014 10:27:41 +0000 (12:27 +0200)
commitaea1ae8760314e072bf1b773521e9de5d5dda10d
treef507dc99db41054ead468c081c58427dff8080d2
parent53066e3ad5df57ec11795dd9130f85acad064e8c
USB: ftdi_sio: fix null deref at port probe

Fix NULL-pointer dereference when probing an interface with no
endpoints.

These devices have two bulk endpoints per interface, but this avoids
crashing the kernel if a user forces a non-FTDI device to be probed.

Note that the iterator variable was made unsigned in order to avoid
a maybe-uninitialized compiler warning for ep_desc after the loop.

Fixes: 895f28badce9 ("USB: ftdi_sio: fix hi-speed device packet size
calculation")

Reported-by: Mike Remski <mremski@mutualink.net>
Tested-by: Mike Remski <mremski@mutualink.net>
Cc: <stable@vger.kernel.org> # 2.6.31
Signed-off-by: Johan Hovold <johan@kernel.org>
drivers/usb/serial/ftdi_sio.c