diff options
| author | Johan Hovold <johan@kernel.org> | 2017-01-03 18:39:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-12 13:39:14 +0300 |
| commit | 9401cc62b7f5acbb65d689e4da2b1b00c85861c3 (patch) | |
| tree | 33afcd32f229ee62b5974591986ffb49e5f49a51 /drivers/usb | |
| parent | 69017618a61ea173bea773a4934a63030ac9998f (diff) | |
| download | linux-9401cc62b7f5acbb65d689e4da2b1b00c85861c3.tar.xz | |
USB: serial: iuu_phoenix: fix NULL-deref at open
commit 90507d54f712d81b74815ef3a4bbb555cd9fab2f upstream.
Fix NULL-pointer dereference at open should the device lack a bulk-in or
bulk-out endpoint:
Unable to handle kernel NULL pointer dereference at virtual address 00000030
...
PC is at iuu_open+0x78/0x59c [iuu_phoenix]
Fixes: 07c3b1a10016 ("USB: remove broken usb-serial num_endpoints
check")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/iuu_phoenix.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c index 344b4eea4bd5..d57fb5199218 100644 --- a/drivers/usb/serial/iuu_phoenix.c +++ b/drivers/usb/serial/iuu_phoenix.c @@ -68,6 +68,16 @@ struct iuu_private { u32 clk; }; +static int iuu_attach(struct usb_serial *serial) +{ + unsigned char num_ports = serial->num_ports; + + if (serial->num_bulk_in < num_ports || serial->num_bulk_out < num_ports) + return -ENODEV; + + return 0; +} + static int iuu_port_probe(struct usb_serial_port *port) { struct iuu_private *priv; @@ -1196,6 +1206,7 @@ static struct usb_serial_driver iuu_device = { .tiocmset = iuu_tiocmset, .set_termios = iuu_set_termios, .init_termios = iuu_init_termios, + .attach = iuu_attach, .port_probe = iuu_port_probe, .port_remove = iuu_port_remove, }; |