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Commit 589a9f0e authored by Anton Vasilyev's avatar Anton Vasilyev Committed by Mauro Carvalho Chehab
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media: dw2102: Fix use after free 

dvb_usb_device_init stores parts of properties at d->props
and d->desc and uses it on dvb_usb_device_exit.
Free of properties on module probe leads to use after free.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204597

The patch makes properties static instead of allocated on heap to prevent
memleak and use after free.
Also fixes s421_properties.devices initialization to have 2 element
instead of 6 copied from p7500_properties.

[mchehab: fix function call alignments]
Link: https://lore.kernel.org/linux-media/20190822104147.4420-1-vasilyev@ispras.ruSigned-off-by: default avatarAnton Vasilyev <vasilyev@ispras.ru>
Fixes: 299c7007 ("media: dw2102: Fix memleak on sequence of probes")
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent c00d65e6
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Showing with 215 additions and 123 deletions
drivers/media/usb/dvb-usb/dw2102.c
View file @ 589a9f0e
......@@ -2150,46 +2150,153 @@ static struct dvb_usb_device_properties s6x0_properties = {
}
};
static const struct dvb_usb_device_description d1100 = {
"Prof 1100 USB ",
static struct dvb_usb_device_properties p1100_properties = {
.caps = DVB_USB_IS_AN_I2C_ADAPTER,
.usb_ctrl = DEVICE_SPECIFIC,
.size_of_priv = sizeof(struct dw2102_state),
.firmware = P1100_FIRMWARE,
.no_reconnect = 1,
.i2c_algo = &s6x0_i2c_algo,
.rc.core = {
.rc_interval = 150,
.rc_codes = RC_MAP_TBS_NEC,
.module_name = "dw2102",
.allowed_protos = RC_PROTO_BIT_NEC,
.rc_query = prof_rc_query,
},
.generic_bulk_ctrl_endpoint = 0x81,
.num_adapters = 1,
.download_firmware = dw2102_load_firmware,
.read_mac_address = s6x0_read_mac_address,
.adapter = {
{
.num_frontends = 1,
.fe = {{
.frontend_attach = stv0288_frontend_attach,
.stream = {
.type = USB_BULK,
.count = 8,
.endpoint = 0x82,
.u = {
.bulk = {
.buffersize = 4096,
}
}
},
} },
}
},
.num_device_descs = 1,
.devices = {
{"Prof 1100 USB ",
{&dw2102_table[PROF_1100], NULL},
{NULL},
},
}
};
static const struct dvb_usb_device_description d660 = {
"TeVii S660 USB",
static struct dvb_usb_device_properties s660_properties = {
.caps = DVB_USB_IS_AN_I2C_ADAPTER,
.usb_ctrl = DEVICE_SPECIFIC,
.size_of_priv = sizeof(struct dw2102_state),
.firmware = S660_FIRMWARE,
.no_reconnect = 1,
.i2c_algo = &s6x0_i2c_algo,
.rc.core = {
.rc_interval = 150,
.rc_codes = RC_MAP_TEVII_NEC,
.module_name = "dw2102",
.allowed_protos = RC_PROTO_BIT_NEC,
.rc_query = dw2102_rc_query,
},
.generic_bulk_ctrl_endpoint = 0x81,
.num_adapters = 1,
.download_firmware = dw2102_load_firmware,
.read_mac_address = s6x0_read_mac_address,
.adapter = {
{
.num_frontends = 1,
.fe = {{
.frontend_attach = ds3000_frontend_attach,
.stream = {
.type = USB_BULK,
.count = 8,
.endpoint = 0x82,
.u = {
.bulk = {
.buffersize = 4096,
}
}
},
} },
}
},
.num_device_descs = 3,
.devices = {
{"TeVii S660 USB",
{&dw2102_table[TEVII_S660], NULL},
{NULL},
};
static const struct dvb_usb_device_description d480_1 = {
"TeVii S480.1 USB",
},
{"TeVii S480.1 USB",
{&dw2102_table[TEVII_S480_1], NULL},
{NULL},
};
static const struct dvb_usb_device_description d480_2 = {
"TeVii S480.2 USB",
},
{"TeVii S480.2 USB",
{&dw2102_table[TEVII_S480_2], NULL},
{NULL},
},
}
};
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 p7500_properties = {
.caps = DVB_USB_IS_AN_I2C_ADAPTER,
.usb_ctrl = DEVICE_SPECIFIC,
.size_of_priv = sizeof(struct dw2102_state),
.firmware = P7500_FIRMWARE,
.no_reconnect = 1,
static const struct dvb_usb_device_description d421 = {
"TeVii S421 PCI",
{&dw2102_table[TEVII_S421], NULL},
{NULL},
};
.i2c_algo = &s6x0_i2c_algo,
.rc.core = {
.rc_interval = 150,
.rc_codes = RC_MAP_TBS_NEC,
.module_name = "dw2102",
.allowed_protos = RC_PROTO_BIT_NEC,
.rc_query = prof_rc_query,
},
static const struct dvb_usb_device_description d632 = {
"TeVii S632 USB",
{&dw2102_table[TEVII_S632], NULL},
.generic_bulk_ctrl_endpoint = 0x81,
.num_adapters = 1,
.download_firmware = dw2102_load_firmware,
.read_mac_address = s6x0_read_mac_address,
.adapter = {
{
.num_frontends = 1,
.fe = {{
.frontend_attach = prof_7500_frontend_attach,
.stream = {
.type = USB_BULK,
.count = 8,
.endpoint = 0x82,
.u = {
.bulk = {
.buffersize = 4096,
}
}
},
} },
}
},
.num_device_descs = 1,
.devices = {
{"Prof 7500 USB DVB-S2",
{&dw2102_table[PROF_7500], NULL},
{NULL},
},
}
};
static struct dvb_usb_device_properties su3000_properties = {
......@@ -2273,6 +2380,59 @@ static struct dvb_usb_device_properties su3000_properties = {
}
};
static struct dvb_usb_device_properties s421_properties = {
.caps = DVB_USB_IS_AN_I2C_ADAPTER,
.usb_ctrl = DEVICE_SPECIFIC,
.size_of_priv = sizeof(struct dw2102_state),
.power_ctrl = su3000_power_ctrl,
.num_adapters = 1,
.identify_state = su3000_identify_state,
.i2c_algo = &su3000_i2c_algo,
.rc.core = {
.rc_interval = 150,
.rc_codes = RC_MAP_SU3000,
.module_name = "dw2102",
.allowed_protos = RC_PROTO_BIT_RC5,
.rc_query = su3000_rc_query,
},
.read_mac_address = su3000_read_mac_address,
.generic_bulk_ctrl_endpoint = 0x01,
.adapter = {
{
.num_frontends = 1,
.fe = {{
.streaming_ctrl = su3000_streaming_ctrl,
.frontend_attach = m88rs2000_frontend_attach,
.stream = {
.type = USB_BULK,
.count = 8,
.endpoint = 0x82,
.u = {
.bulk = {
.buffersize = 4096,
}
}
}
} },
}
},
.num_device_descs = 2,
.devices = {
{ "TeVii S421 PCI",
{ &dw2102_table[TEVII_S421], NULL },
{ NULL },
},
{ "TeVii S632 USB",
{ &dw2102_table[TEVII_S632], NULL },
{ NULL },
},
}
};
static struct dvb_usb_device_properties t220_properties = {
.caps = DVB_USB_IS_AN_I2C_ADAPTER,
.usb_ctrl = DEVICE_SPECIFIC,
......@@ -2390,101 +2550,33 @@ static struct dvb_usb_device_properties tt_s2_4600_properties = {
static int dw2102_probe(struct usb_interface *intf,
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)
goto err0;
/* copy default structure */
/* fill only different fields */
p1100->firmware = P1100_FIRMWARE;
p1100->devices[0] = d1100;
p1100->rc.core.rc_query = prof_rc_query;
p1100->rc.core.rc_codes = RC_MAP_TBS_NEC;
p1100->adapter->fe[0].frontend_attach = stv0288_frontend_attach;
s660 = kmemdup(&s6x0_properties,
sizeof(struct dvb_usb_device_properties), GFP_KERNEL);
if (!s660)
goto err1;
s660->firmware = S660_FIRMWARE;
s660->num_device_descs = 3;
s660->devices[0] = d660;
s660->devices[1] = d480_1;
s660->devices[2] = d480_2;
s660->adapter->fe[0].frontend_attach = ds3000_frontend_attach;
p7500 = kmemdup(&s6x0_properties,
sizeof(struct dvb_usb_device_properties), GFP_KERNEL);
if (!p7500)
goto err2;
p7500->firmware = P7500_FIRMWARE;
p7500->devices[0] = d7500;
p7500->rc.core.rc_query = prof_rc_query;
p7500->rc.core.rc_codes = RC_MAP_TBS_NEC;
p7500->adapter->fe[0].frontend_attach = prof_7500_frontend_attach;
s421 = kmemdup(&su3000_properties,
sizeof(struct dvb_usb_device_properties), GFP_KERNEL);
if (!s421)
goto err3;
s421->num_device_descs = 2;
s421->devices[0] = d421;
s421->devices[1] = d632;
s421->adapter->fe[0].frontend_attach = m88rs2000_frontend_attach;
if (0 == dvb_usb_device_init(intf, &dw2102_properties,
THIS_MODULE, NULL, adapter_nr) ||
0 == dvb_usb_device_init(intf, &dw2104_properties,
THIS_MODULE, NULL, adapter_nr) ||
0 == dvb_usb_device_init(intf, &dw3101_properties,
THIS_MODULE, NULL, adapter_nr) ||
0 == dvb_usb_device_init(intf, &s6x0_properties,
THIS_MODULE, NULL, adapter_nr) ||
0 == dvb_usb_device_init(intf, p1100,
THIS_MODULE, NULL, adapter_nr) ||
0 == dvb_usb_device_init(intf, s660,
THIS_MODULE, NULL, adapter_nr) ||
0 == dvb_usb_device_init(intf, p7500,
THIS_MODULE, NULL, adapter_nr) ||
0 == dvb_usb_device_init(intf, s421,
THIS_MODULE, NULL, adapter_nr) ||
0 == dvb_usb_device_init(intf, &su3000_properties,
THIS_MODULE, NULL, adapter_nr) ||
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)) {
/* clean up copied properties */
kfree(s421);
kfree(p7500);
kfree(s660);
kfree(p1100);
if (!(dvb_usb_device_init(intf, &dw2102_properties,
THIS_MODULE, NULL, adapter_nr) &&
dvb_usb_device_init(intf, &dw2104_properties,
THIS_MODULE, NULL, adapter_nr) &&
dvb_usb_device_init(intf, &dw3101_properties,
THIS_MODULE, NULL, adapter_nr) &&
dvb_usb_device_init(intf, &s6x0_properties,
THIS_MODULE, NULL, adapter_nr) &&
dvb_usb_device_init(intf, &p1100_properties,
THIS_MODULE, NULL, adapter_nr) &&
dvb_usb_device_init(intf, &s660_properties,
THIS_MODULE, NULL, adapter_nr) &&
dvb_usb_device_init(intf, &p7500_properties,
THIS_MODULE, NULL, adapter_nr) &&
dvb_usb_device_init(intf, &s421_properties,
THIS_MODULE, NULL, adapter_nr) &&
dvb_usb_device_init(intf, &su3000_properties,
THIS_MODULE, NULL, adapter_nr) &&
dvb_usb_device_init(intf, &t220_properties,
THIS_MODULE, NULL, adapter_nr) &&
dvb_usb_device_init(intf, &tt_s2_4600_properties,
THIS_MODULE, NULL, adapter_nr))) {
return 0;
}
retval = -ENODEV;
kfree(s421);
err3:
kfree(p7500);
err2:
kfree(s660);
err1:
kfree(p1100);
err0:
return retval;
return -ENODEV;
}
static void dw2102_disconnect(struct usb_interface *intf)
......
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