diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-07 08:48:15 -0800 |
|---|---|---|
| committer | Zefan Li <lizefan@huawei.com> | 2015-04-14 17:33:43 +0800 |
| commit | 300b82c92c02ca5ba393f6cd105eb2e4d4986b77 (patch) | |
| tree | 61eff905170a62f7c60b6a491c64ae5f7d760e36 | |
| parent | affd0637d5b1569ed8537b2bbe113da93e5ae734 (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>
Signed-off-by: Zefan Li <lizefan@huawei.com>
| -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 cd8550a18282..05325773ab94 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1108,10 +1108,11 @@ 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) |