From: Johan Hovold johan@kernel.org
commit 59920635b89d74b9207ea803d5e91498d39e8b69 upstream.
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: 1da177e4c3f4 ("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
--- drivers/usb/misc/idmouse.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/misc/idmouse.c +++ b/drivers/usb/misc/idmouse.c @@ -342,7 +342,7 @@ static int idmouse_probe(struct usb_inte 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;