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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2014-11-29 01:29:10 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-12-02 16:15:02 -0800
commit3ff67445750a84de67faaf52c6e1895cb09f2c56 (patch)
tree2a50f3fd3401948f0bcfe8ba1fa468bd2c828074
parent016040268ccafaa7ad74ef88708d54fedeb87072 (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>
-rw-r--r--drivers/usb/usbip/stub_dev.c26
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c
index fac20e0..a3ec49b 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)