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usbip: vhci_hcd: check rhport before using in vhci_hub_control()

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Validate !rhport < 0 before using it to access port_status array.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shuah Khan 2018-04-05 16:31:49 -06:00 committed by Greg Kroah-Hartman
parent 83a62c51ba
commit 5b22f67611
1 changed files with 13 additions and 0 deletions
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13
drivers/usb/usbip/vhci_hcd.c
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@ -354,6 +354,8 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
usbip_dbg_vhci_rh(" ClearHubFeature\n");
break;
case ClearPortFeature:
if (rhport < 0)
goto error;
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
if (hcd->speed == HCD_USB3) {
@ -511,11 +513,16 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
goto error;
}
if (rhport < 0)
goto error;
vhci_hcd->port_status[rhport] |= USB_PORT_STAT_SUSPEND;
break;
case USB_PORT_FEAT_POWER:
usbip_dbg_vhci_rh(
" SetPortFeature: USB_PORT_FEAT_POWER\n");
if (rhport < 0)
goto error;
if (hcd->speed == HCD_USB3)
vhci_hcd->port_status[rhport] |= USB_SS_PORT_STAT_POWER;
else
@ -524,6 +531,8 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
case USB_PORT_FEAT_BH_PORT_RESET:
usbip_dbg_vhci_rh(
" SetPortFeature: USB_PORT_FEAT_BH_PORT_RESET\n");
if (rhport < 0)
goto error;
/* Applicable only for USB3.0 hub */
if (hcd->speed != HCD_USB3) {
pr_err("USB_PORT_FEAT_BH_PORT_RESET req not "
@ -534,6 +543,8 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
case USB_PORT_FEAT_RESET:
usbip_dbg_vhci_rh(
" SetPortFeature: USB_PORT_FEAT_RESET\n");
if (rhport < 0)
goto error;
/* if it's already enabled, disable */
if (hcd->speed == HCD_USB3) {
vhci_hcd->port_status[rhport] = 0;
@ -554,6 +565,8 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
default:
usbip_dbg_vhci_rh(" SetPortFeature: default %d\n",
wValue);
if (rhport < 0)
goto error;
if (hcd->speed == HCD_USB3) {
if ((vhci_hcd->port_status[rhport] &
USB_SS_PORT_STAT_POWER) != 0) {