From: Randy Dunlap rdunlap@infradead.org
commit 718bf42b119de652ebcc93655a1f33a9c0d04b3c upstream.
Fix shift out-of-bounds in vhci_hcd.c:
UBSAN: shift-out-of-bounds in ../drivers/usb/usbip/vhci_hcd.c:399:41 shift exponent 768 is too large for 32-bit type 'int'
Fixes: 03cd00d538a6 ("usbip: vhci-hcd: Set the vhci structure up to work") Signed-off-by: Randy Dunlap rdunlap@infradead.org Reported-by: syzbot+297d20e437b79283bf6d@syzkaller.appspotmail.com Cc: Yuyang Du yuyang.du@intel.com Cc: Shuah Khan shuahkh@osg.samsung.com Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/20201229071309.18418-1-rdunlap@infradead.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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 @@ -410,6 +410,8 @@ static int vhci_hub_control(struct usb_h default: usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", wValue); + if (wValue >= 32) + goto error; vhci_hcd->port_status[rhport] &= ~(1 << wValue); break; }