diff options
| author | Alexey Khoroshilov <khoroshilov@ispras.ru> | 2014-11-29 01:29:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-12-02 16:15:02 -0800 |
| commit | 3ff67445750a84de67faaf52c6e1895cb09f2c56 (patch) | |
| tree | 2a50f3fd3401948f0bcfe8ba1fa468bd2c828074 /drivers/usb/usbip | |
| parent | 016040268ccafaa7ad74ef88708d54fedeb87072 (diff) | |
usbip: fix error handling in stub_probe()
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>
Diffstat (limited to 'drivers/usb/usbip')
| -rw-r--r-- | drivers/usb/usbip/stub_dev.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c index fac20e0434c0..a3ec49bdc1e6 100644 --- a/drivers/usb/usbip/stub_dev.c +++ b/drivers/usb/usbip/stub_dev.c @@ -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) |