From: Shuah Khan skhan@linuxfoundation.org
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@syzkaller.appspotmail.com Cc: stable@vger.kernel.org Signed-off-by: Shuah Khan skhan@linuxfoundation.org Link: https://lore.kernel.org/r/20210324230654.34798-1-skhan@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/usbip/vhci_hcd.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index 0909cfcbf7205..32a4dfeea06af 100644 --- 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_hcd *hcd, u16 typeReq, u16 wValue, 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) {