linux-kernel - [PATCH] usbip: vhci_hcd fix shift out-of-bounds in vhci_hub

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Message-Id: <20210324230654.34798-1-skhan@linuxfoundation.org>
Date:   Wed, 24 Mar 2021 17:06:54 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     valentina.manea.m@...il.com, shuah@...nel.org,
        gregkh@...uxfoundation.org
Cc:     Shuah Khan <skhan@...uxfoundation.org>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        syzbot+3dea30b047f41084de66@...kaller.appspotmail.com,
        stable@...r.kernel.org
Subject: [PATCH] usbip: vhci_hcd fix shift out-of-bounds in vhci_hub_control()

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@...kaller.appspotmail.com
Cc: stable@...r.kernel.org
Signed-off-by: Shuah Khan <skhan@...uxfoundation.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 3209b5ddd30c..a20a8380ca0c 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) {
-- 
2.27.0