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)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 9 Jul 2014 18:14:00 +0000 (11:14 -0700)
commit086d371dff6431caf9e41e9a761b98478542ef3a
tree766ed890237070a81bd9bc841922cd606811c0c0
parent34ee9a95391363f047b05a3271fd755f3639c144
USB: ftdi_sio: fix null deref at port probe

commit aea1ae8760314e072bf1b773521e9de5d5dda10d upstream.

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>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/serial/ftdi_sio.c