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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-07 19:48:15 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-25 04:21:42 +0300
commit403dff4e2c94f275e24fd85f40b2732ffec268a1 (patch)
tree0fca85c289bfb39fa05f085b5a9655684ee57e19 /drivers/usb/class
parentd908f8478a8d18e66c80a12adb27764920c1f1ca (diff)
downloadlinux-403dff4e2c94f275e24fd85f40b2732ffec268a1.tar.xz
USB: cdc-acm: check for valid interfaces
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> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class')
-rw-r--r--drivers/usb/class/cdc-acm.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 6c6a5c4cc68c..546a17e8ad5b 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1195,10 +1195,11 @@ 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)