From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sebastian Andrzej Siewior , David Dueck , Felipe Balbi Subject: [PATCH 3.19 46/75] usb: phy: am335x-control: check return value of bus_find_device Date: Fri, 10 Apr 2015 15:19:12 +0200 Message-Id: <20150410131710.079974176@linuxfoundation.org> In-Reply-To: <20150410131707.794709951@linuxfoundation.org> References: <20150410131707.794709951@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: David Dueck commit d0f347d62814ec0f599a05c61c5619d5e999e4ae upstream. This fixes a potential null pointer dereference. Fixes: d4332013919a ("driver core: dev_get_drvdata: Don't check for NULL dev") Acked-by: Sebastian Andrzej Siewior Signed-off-by: David Dueck Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/phy/phy-am335x-control.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/usb/phy/phy-am335x-control.c +++ b/drivers/usb/phy/phy-am335x-control.c @@ -126,6 +126,9 @@ struct phy_control *am335x_get_phy_contr return NULL; dev = bus_find_device(&platform_bus_type, NULL, node, match); + if (!dev) + return NULL; + ctrl_usb = dev_get_drvdata(dev); if (!ctrl_usb) return NULL;