linux-kernel - [PATCH] usb: gadget: goku_udc: fix memory leak in goku

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Date:   Fri, 26 Aug 2016 03:06:02 +0300
From:   Alexey Khoroshilov <khoroshilov@...ras.ru>
To:     Felipe Balbi <balbi@...nel.org>
Cc:     Alexey Khoroshilov <khoroshilov@...ras.ru>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        ldv-project@...uxtesting.org
Subject: [PATCH] usb: gadget: goku_udc: fix memory leak in goku_probe()

Memory allocated for goku_udc device is not deallocated at error
paths in goku_probe(), because gadget_release() destructor
is not registered yet.

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
 drivers/usb/gadget/udc/goku_udc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/gadget/udc/goku_udc.c b/drivers/usb/gadget/udc/goku_udc.c
index d2205d9e0c8b..8b290c128d97 100644
--- a/drivers/usb/gadget/udc/goku_udc.c
+++ b/drivers/usb/gadget/udc/goku_udc.c
@@ -1839,6 +1839,8 @@ static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 err:
 	if (dev)
 		goku_remove (pdev);
+	/* gadget_release is not registered yet, kfree explicitly */
+	kfree(dev);
 	return retval;
 }
 
-- 
2.7.4