diff mbox series

usb: max-3421: fix potential shift out-of-bounds in max3421_hub_control()

Message ID tencent_D1B05B6060451EA10A64A88E122E37EDB508@qq.com
State New
Headers show
Series usb: max-3421: fix potential shift out-of-bounds in max3421_hub_control() | expand

Commit Message

Zhang Shurong June 25, 2023, 5:12 p.m. UTC 
Fix potential shift out-of-bounds in max3421_hub_control()
ClearPortFeature handling and SetPortFeature handling.

wValue may be greater than 32 which can not be used for shifting.

similar patch:
https://patchwork.kernel.org/patch/12162547

Signed-off-by: Zhang Shurong <zhang_shurong@foxmail.com>
---
 drivers/usb/host/max3421-hcd.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/host/max3421-hcd.c b/drivers/usb/host/max3421-hcd.c
index d152d72de126..035cd6abc2f6 100644
--- a/drivers/usb/host/max3421-hcd.c
+++ b/drivers/usb/host/max3421-hcd.c
@@ -1688,6 +1688,8 @@  max3421_hub_control(struct usb_hcd *hcd, u16 type_req, u16 value, u16 index,
 						!pdata->vbus_active_level);
 			fallthrough;
 		default:
+			if (value >= 32)
+				goto error;
 			max3421_hcd->port_status &= ~(1 << value);
 		}
 		break;
@@ -1741,6 +1743,8 @@  max3421_hub_control(struct usb_hcd *hcd, u16 type_req, u16 value, u16 index,
 			max3421_reset_port(hcd);
 			fallthrough;
 		default:
+			if (value >= 32)
+				goto error;
 			if ((max3421_hcd->port_status & USB_PORT_STAT_POWER)
 			    != 0)
 				max3421_hcd->port_status |= (1 << value);