| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.10 28/44] USB: cdc-acm: check for valid interfaces | Date | Tue, 13 Jan 2015 23:23:49 -0800 |
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3.10-stable review patch. If anyone has any objections, please let me know.
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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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>
--- drivers/usb/class/cdc-acm.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)
--- 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)
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