From: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> commit 1cc5ed25bdade86de2650a82b2730108a76de20c upstream. Fix shift out-of-bounds in vhci_hub_control() SetPortFeature handling. UBSAN: shift-out-of-bounds in drivers/usb/usbip/vhci_hcd.c:605:42 shift exponent 768 is too large for 32-bit type 'int' Reported-by: syzbot+3dea30b047f41084de66@xxxxxxxxxxxxxxxxxxxxxxxxx Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20210324230654.34798-1-skhan@xxxxxxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/usbip/vhci_hcd.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -594,6 +594,8 @@ static int vhci_hub_control(struct usb_h pr_err("invalid port number %d\n", wIndex); goto error; } + if (wValue >= 32) + goto error; if (hcd->speed == HCD_USB3) { if ((vhci_hcd->port_status[rhport] & USB_SS_PORT_STAT_POWER) != 0) {
