diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/misc/usbtest.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c index 1c78e747f72b..d6fcbc477fc5 100644 --- a/drivers/usb/misc/usbtest.c +++ b/drivers/usb/misc/usbtest.c @@ -628,6 +628,35 @@ static int is_good_ext(struct usbtest_dev *tdev, u8 *buf) return 1; } +static int is_good_ss_cap(struct usbtest_dev *tdev, u8 *buf) +{ + struct usb_ss_cap_descriptor *ss; + + ss = (struct usb_ss_cap_descriptor *) buf; + + if (ss->bLength != USB_DT_USB_SS_CAP_SIZE) { + ERROR(tdev, "bogus superspeed device capability descriptor length\n"); + return 0; + } + + /* + * only bit[1] of bmAttributes is used for LTM and others are + * reserved + */ + if (ss->bmAttributes & ~0x02) { /* reserved == 0 */ + ERROR(tdev, "reserved bits set in bmAttributes\n"); + return 0; + } + + /* bits[0:3] of wSpeedSupported is used and others are reserved */ + if (le16_to_cpu(ss->wSpeedSupported) & ~0x0f) { /* reserved == 0 */ + ERROR(tdev, "reserved bits set in wSpeedSupported\n"); + return 0; + } + + return 1; +} + /* sanity test for standard requests working with usb_control_mesg() and some * of the utility functions which use it. * @@ -773,6 +802,14 @@ static int ch9_postconfig(struct usbtest_dev *dev) return -EDOM; } break; + case USB_SS_CAP_TYPE: + if (buf + USB_DT_USB_SS_CAP_SIZE > + dev->buf + total || + !is_good_ss_cap(dev, buf)) { + dev_err(&iface->dev, "bogus superspeed device capability descriptor\n"); + return -EDOM; + } + break; default: break; } |