From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:50154 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728781AbeIREjI (ORCPT ); Tue, 18 Sep 2018 00:39:08 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Anton Vasilyev , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.18 056/158] media: dw2102: Fix memleak on sequence of probes Date: Tue, 18 Sep 2018 00:41:26 +0200 Message-Id: <20180917211713.852628477@linuxfoundation.org> In-Reply-To: <20180917211710.383360696@linuxfoundation.org> References: <20180917211710.383360696@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Anton Vasilyev [ Upstream commit 299c7007e93645067e1d2743f4e50156de78c4ff ] Each call to dw2102_probe() allocates memory by kmemdup for structures p1100, s660, p7500 and s421, but there is no their deallocation. dvb_usb_device_init() copies the corresponding structure into dvb_usb_device->props, so there is no use of original structure after dvb_usb_device_init(). The patch moves structures from global scope to local and adds their deallocation. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Anton Vasilyev Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/media/usb/dvb-usb/dw2102.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) --- a/drivers/media/usb/dvb-usb/dw2102.c +++ b/drivers/media/usb/dvb-usb/dw2102.c @@ -2101,14 +2101,12 @@ static struct dvb_usb_device_properties } }; -static struct dvb_usb_device_properties *p1100; static const struct dvb_usb_device_description d1100 = { "Prof 1100 USB ", {&dw2102_table[PROF_1100], NULL}, {NULL}, }; -static struct dvb_usb_device_properties *s660; static const struct dvb_usb_device_description d660 = { "TeVii S660 USB", {&dw2102_table[TEVII_S660], NULL}, @@ -2127,14 +2125,12 @@ static const struct dvb_usb_device_descr {NULL}, }; -static struct dvb_usb_device_properties *p7500; static const struct dvb_usb_device_description d7500 = { "Prof 7500 USB DVB-S2", {&dw2102_table[PROF_7500], NULL}, {NULL}, }; -static struct dvb_usb_device_properties *s421; static const struct dvb_usb_device_description d421 = { "TeVii S421 PCI", {&dw2102_table[TEVII_S421], NULL}, @@ -2334,6 +2330,11 @@ static int dw2102_probe(struct usb_inter const struct usb_device_id *id) { int retval = -ENOMEM; + struct dvb_usb_device_properties *p1100; + struct dvb_usb_device_properties *s660; + struct dvb_usb_device_properties *p7500; + struct dvb_usb_device_properties *s421; + p1100 = kmemdup(&s6x0_properties, sizeof(struct dvb_usb_device_properties), GFP_KERNEL); if (!p1100) @@ -2402,8 +2403,16 @@ static int dw2102_probe(struct usb_inter 0 == dvb_usb_device_init(intf, &t220_properties, THIS_MODULE, NULL, adapter_nr) || 0 == dvb_usb_device_init(intf, &tt_s2_4600_properties, - THIS_MODULE, NULL, adapter_nr)) + THIS_MODULE, NULL, adapter_nr)) { + + /* clean up copied properties */ + kfree(s421); + kfree(p7500); + kfree(s660); + kfree(p1100); + return 0; + } retval = -ENODEV; kfree(s421);