This is a note to let you know that I've just added the patch titled

usb: usbip: vhci_hcd: protect shift size

to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 718bf42b119de652ebcc93655a1f33a9c0d04b3c Mon Sep 17 00:00:00 2001

From: Randy Dunlap rdunlap@infradead.org Date: Mon, 28 Dec 2020 23:13:09 -0800 Subject: usb: usbip: vhci_hcd: protect shift size

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(+)

diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index 66cde5e5f796..3209b5ddd30c 100644 --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -396,6 +396,8 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, default: usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", wValue); + if (wValue >= 32) + goto error; vhci_hcd->port_status[rhport] &= ~(1 << wValue); break; }