linux-kernel - [PATCH] usb: gadget: net2280: fix memory leak on probe error handling paths

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200721201558.20069-1-novikov@ispras.ru>
Date:   Tue, 21 Jul 2020 23:15:58 +0300
From:   Evgeny Novikov <novikov@...ras.ru>
To:     Felipe Balbi <balbi@...nel.org>
Cc:     Evgeny Novikov <novikov@...ras.ru>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>,
        Corentin Labbe <clabbe@...libre.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        ldv-project@...uxtesting.org
Subject: [PATCH] usb: gadget: net2280: fix memory leak on probe error handling paths

Driver does not release memory for device on error handling paths in
net2280_probe() when gadget_release() is not registered yet.

The patch fixes the bug like in other similar drivers.

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

Signed-off-by: Evgeny Novikov <novikov@...ras.ru>
---
 drivers/usb/gadget/udc/net2280.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index 5eff85eeaa5a..d5fe071b2db2 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -3781,8 +3781,10 @@ static int net2280_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	return 0;
 
 done:
-	if (dev)
+	if (dev) {
 		net2280_remove(pdev);
+		kfree(dev);
+	}
 	return retval;
 }
 
-- 
2.16.4