diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-07 08:48:15 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-16 06:59:02 -0800 |
| commit | edefe2069bc0d8ab1fd03dd9b141cbfec98aca8f (patch) | |
| tree | fb8240da460dbc09341ade01cdf561495fc2220c | |
| parent | c5bcceb0e607ef522d8b244a40d08080f04cde65 (diff) | |
USB: cdc-acm: check for valid interfaces
commit 403dff4e2c94f275e24fd85f40b2732ffec268a1 upstream.
We need to check that we have both a valid data and control inteface for both
types of headers (union and not union.)
References: https://bugzilla.kernel.org/show_bug.cgi?id=83551
Reported-by: Simon Schubert <2+kernel@0x2c.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 1e71f918eb9f..0228d591a1d5 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1087,10 +1087,11 @@ next_desc: } else { control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); - if (!control_interface || !data_interface) { - dev_dbg(&intf->dev, "no interfaces\n"); - return -ENODEV; - } + } + + if (!control_interface || !data_interface) { + dev_dbg(&intf->dev, "no interfaces\n"); + return -ENODEV; } if (data_interface_num != call_interface_num) |