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lx_emul: active config validation in usb driver

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Fix genodelabs/genode#4567
This commit is contained in:
Stefan Kalkowski 2022-06-29 15:29:34 +02:00 committed by Christian Helmuth
parent 92a5fa9bed
commit 560747c22e
1 changed files with 8 additions and 4 deletions
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12
repos/dde_linux/src/lib/lx_emul/usb.c
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@ -233,7 +233,7 @@ static int usb_rpc_call(void * data)
if (usb_rpc_args.call == RELEASE_ALL) {
i = 0;
num = udev->actconfig->desc.bNumInterfaces;
num = (udev->actconfig) ? udev->actconfig->desc.bNumInterfaces : 0;
} else {
i = usb_rpc_args.iface_num;
num = i + 1;
@ -771,7 +771,7 @@ static int raw_notify(struct notifier_block *nb, unsigned long action, void *dat
* policies.
*/
unsigned long class;
unsigned i;
unsigned i, num;
struct usb_iface_urbs *urbs = (struct usb_iface_urbs*)
kmalloc(sizeof(struct usb_iface_urbs), GFP_KERNEL);
init_usb_anchor(&urbs->submitted);
@ -779,8 +779,12 @@ static int raw_notify(struct notifier_block *nb, unsigned long action, void *dat
dev_set_drvdata(&udev->dev, urbs);
for (i = 0; i < udev->actconfig->desc.bNumInterfaces; i++) {
struct usb_interface * iface = udev->actconfig->interface[i];
class = 0;
num = (udev->actconfig) ?
udev->actconfig->desc.bNumInterfaces : 0;
for (i = 0; i < num; i++) {
struct usb_interface * iface =
(udev->actconfig) ? udev->actconfig->interface[i] : NULL;
if (!iface || !iface->cur_altsetting) continue;
if (i == 0 ||
iface->cur_altsetting->desc.bInterfaceClass ==