4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Anton Vasilyev <vasilyev@xxxxxxxxx>
[ 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 <vasilyev@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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);
