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usb: usbip: fix a refcount leak in stub_probe()

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[ Upstream commit 9ec4cbf1cc ]

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: 3ff6744575 ("usbip: fix error handling in stub_probe()")
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20220412020257.9767-1-hbh25y@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hangyu Hua
2022-04-12 10:02:57 +08:00
committed by Greg Kroah-Hartman
parent 4e3a2d77bd
commit bcbb795a9e
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/usbip/stub_dev.c
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@@ -393,7 +393,6 @@ static int stub_probe(struct usb_device *udev)
err_port: err_port:
dev_set_drvdata(&udev->dev, NULL); dev_set_drvdata(&udev->dev, NULL);
usb_put_dev(udev);
/* we already have busid_priv, just lock busid_lock */ /* we already have busid_priv, just lock busid_lock */
spin_lock(&busid_priv->busid_lock); spin_lock(&busid_priv->busid_lock);
@@ -408,6 +407,7 @@ call_put_busid_priv:
put_busid_priv(busid_priv); put_busid_priv(busid_priv);
sdev_free: sdev_free:
usb_put_dev(udev);
stub_device_free(sdev); stub_device_free(sdev);
return rc; return rc;