Sorry. CC related people.
On Mon, Jun 26, 2017 at 12:04:54PM +0800, Yuyang Du wrote:
> Hi Dan,
>
> Thanks for the report. A patch to fix the bug follows:
>
> diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
> index 64c3860..2c4b2fd 100644
> --- a/drivers/usb/usbip/vhci_hcd.c
> +++ b/drivers/usb/usbip/vhci_hcd.c
> @@ -1301,7 +1301,7 @@ static struct hc_driver vhci_hc_driver = {
>
> static int vhci_hcd_probe(struct platform_device *pdev)
> {
> - struct vhci *vhci;
> + struct vhci *vhci = *((void
> **)dev_get_platdata(&pdev->dev));
> struct usb_hcd *hcd_hs;
> struct usb_hcd *hcd_ss;
> int ret;
>
> Thanks,
> Yuyang
>
> On Fri, Jun 23, 2017 at 01:46:01PM +0300, Dan Carpenter wrote:
> > Hello Yuyang Du,
> >
> > The patch 03cd00d538a6: "usbip: vhci-hcd: Set the vhci structure up
> > to work" from Jun 8, 2017, leads to the following static checker
> > warning:
> >
> > drivers/usb/usbip/vhci_hcd.c:1355 vhci_hcd_probe()
> > error: potentially dereferencing uninitialized 'vhci'.
> >
> > drivers/usb/usbip/vhci_hcd.c
> > 1340 ret = usb_add_hcd(hcd_ss, 0, 0);
> > 1341 if (ret) {
> > 1342 pr_err("usb_add_hcd ss failed %d\n", ret);
> > 1343 goto put_usb3_hcd;
> > 1344 }
> > 1345
> > 1346 usbip_dbg_vhci_hc("bye\n");
> > 1347 return 0;
> > 1348
> > 1349 put_usb3_hcd:
> > 1350 usb_put_hcd(hcd_ss);
> > 1351 remove_usb2_hcd:
> > 1352 usb_remove_hcd(hcd_hs);
> > 1353 put_usb2_hcd:
> > 1354 usb_put_hcd(hcd_hs);
> > 1355 vhci->vhci_hcd_hs = NULL;
> > ^^^^^^^^^^^^^^^^^
> > 1356 vhci->vhci_hcd_ss = NULL;
> > ^^^^^^^^^^^^^^^^^
> > vhci is never initialized.
> >
> > 1357 return ret;
> > 1358 }
> --
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