This is a note to let you know that I've just added the patch titled
usb: usbip: fix a refcount leak in stub_probe()
to the 5.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-usbip-fix-a-refcount-leak-in-stub_probe.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8fa8b65f33541b152011708b3716532660f60f42
Author: Hangyu Hua <hbh25y@xxxxxxxxx>
Date: Tue Apr 12 10:02:57 2022 +0800
usb: usbip: fix a refcount leak in stub_probe()
[ Upstream commit 9ec4cbf1cc55d126759051acfe328d489c5d6e60 ]
usb_get_dev() is called in stub_device_alloc(). When stub_probe() fails
after that, usb_put_dev() needs to be called to release the reference.
Fix this by moving usb_put_dev() to sdev_free error path handling.
Find this by code review.
Fixes: 3ff67445750a ("usbip: fix error handling in stub_probe()")
Reviewed-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Hangyu Hua <hbh25y@xxxxxxxxx>
Link: https://lore.kernel.org/r/20220412020257.9767-1-hbh25y@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c
index d8d3892e5a69..3c6d452e3bf4 100644
--- a/drivers/usb/usbip/stub_dev.c
+++ b/drivers/usb/usbip/stub_dev.c
@@ -393,7 +393,6 @@ static int stub_probe(struct usb_device *udev)
err_port:
dev_set_drvdata(&udev->dev, NULL);
- usb_put_dev(udev);
/* we already have busid_priv, just lock busid_lock */
spin_lock(&busid_priv->busid_lock);
@@ -408,6 +407,7 @@ static int stub_probe(struct usb_device *udev)
put_busid_priv(busid_priv);
sdev_free:
+ usb_put_dev(udev);
stub_device_free(sdev);
return rc;
