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USB: idmouse: fix interface sanity checks 

Make sure to use the current alternate setting when verifying the
interface descriptors to avoid binding to an invalid interface.

Failing to do so could cause the driver to misbehave or trigger a WARN()
in usb_submit_urb() that kernels with panic_on_warn set would choke on.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210112601.3561-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2019-12-10 12:26:00 +01:00 committed by Greg Kroah-Hartman
parent 7c5a2df336
commit 59920635b8
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/misc/idmouse.c
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@ -322,7 +322,7 @@ static int idmouse_probe(struct usb_interface *interface,
int result;
/* check if we have gotten the data or the hid interface */
iface_desc = &interface->altsetting[0];
iface_desc = interface->cur_altsetting;
if (iface_desc->desc.bInterfaceClass != 0x0A)
return -ENODEV;