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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-07 08:48:15 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-16 06:59:32 -0800
commit77e2e4877b2000379a5e525d51e79e6705ce242d (patch)
tree5b856dbd3c0a80c1ad0c7501e81d0d41638d2a9e
parent628b776115aa817dddee83c29fde3ba7fe806a96 (diff)
downloadlinux-linaro-stable-77e2e4877b2000379a5e525d51e79e6705ce242d.tar.gz
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.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 331f06a91cc3..d2e161de77a8 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1169,10 +1169,11 @@ 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)