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usbip: fix error handling in stub_probe()

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If usb_hub_claim_port() fails, no resources are deallocated and
if stub_add_files() fails, port is not released.

The patch fixes these issues and rearranges error handling code.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: Valentina Manea <valentina.manea.m@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexey Khoroshilov 2014-11-29 01:29:10 +03:00 committed by Greg Kroah-Hartman
parent 016040268c
commit 3ff6744575
1 changed files with 15 additions and 11 deletions
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26
drivers/usb/usbip/stub_dev.c
View File

@ -311,7 +311,6 @@ static int stub_probe(struct usb_device *udev)
{
struct stub_device *sdev = NULL;
const char *udev_busid = dev_name(&udev->dev);
int err = 0;
struct bus_id_priv *busid_priv;
int rc;
@ -372,23 +371,28 @@ static int stub_probe(struct usb_device *udev)
(struct usb_dev_state *) udev);
if (rc) {
dev_dbg(&udev->dev, "unable to claim port\n");
return rc;
goto err_port;
}
err = stub_add_files(&udev->dev);
if (err) {
rc = stub_add_files(&udev->dev);
if (rc) {
dev_err(&udev->dev, "stub_add_files for %s\n", udev_busid);
dev_set_drvdata(&udev->dev, NULL);
usb_put_dev(udev);
kthread_stop_put(sdev->ud.eh);
busid_priv->sdev = NULL;
stub_device_free(sdev);
return err;
goto err_files;
}
busid_priv->status = STUB_BUSID_ALLOC;
return 0;
err_files:
usb_hub_release_port(udev->parent, udev->portnum,
(struct usb_dev_state *) udev);
err_port:
dev_set_drvdata(&udev->dev, NULL);
usb_put_dev(udev);
kthread_stop_put(sdev->ud.eh);
busid_priv->sdev = NULL;
stub_device_free(sdev);
return rc;
}
static void shutdown_busid(struct bus_id_priv *busid_priv)