[PATCH] media: cxusb: fix uninitialized local variable

[Valentin Vidic]

Make sure ircode does not contain random values if the call to
cxusb_ctrl_msg fails for some reason.

Reported-by: syzbot+98730b985cad4931a...@syzkaller.appspotmail.com
Signed-off-by: Valentin Vidic <vvi...@valentin-vidic.from.hr>
---
 drivers/media/usb/dvb-usb/cxusb.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/media/usb/dvb-usb/cxusb.c 
b/drivers/media/usb/dvb-usb/cxusb.c
index f02fa0a67aa4..afcd88dd96c0 100644
--- a/drivers/media/usb/dvb-usb/cxusb.c
+++ b/drivers/media/usb/dvb-usb/cxusb.c
@@ -519,7 +519,7 @@ static int cxusb_d680_dmb_streaming_ctrl(struct 
dvb_usb_adapter *adap,
 
 static int cxusb_rc_query(struct dvb_usb_device *d)
 {
-       u8 ircode[4];
+       u8 ircode[4] = { 0 };
 
        cxusb_ctrl_msg(d, CMD_GET_IR_CODE, NULL, 0, ircode, 4);
 
@@ -531,7 +531,7 @@ static int cxusb_rc_query(struct dvb_usb_device *d)
 
 static int cxusb_bluebird2_rc_query(struct dvb_usb_device *d)
 {
-       u8 ircode[4];
+       u8 ircode[4] = { 0 };
        struct i2c_msg msg = {
                .addr = 0x6b,
                .flags = I2C_M_RD,
@@ -550,7 +550,7 @@ static int cxusb_bluebird2_rc_query(struct dvb_usb_device 
*d)
 
 static int cxusb_d680_dmb_rc_query(struct dvb_usb_device *d)
 {
-       u8 ircode[2];
+       u8 ircode[2] = { 0 };
 
        if (cxusb_ctrl_msg(d, 0x10, NULL, 0, ircode, 2) < 0)
                return 0;
@@ -989,7 +989,7 @@ static int cxusb_dee1601_frontend_attach(struct 
dvb_usb_adapter *adap)
 
 static int cxusb_dualdig4_frontend_attach(struct dvb_usb_adapter *adap)
 {
-       u8 ircode[4];
+       u8 ircode[4] = { 0 };
        int i;
        struct i2c_msg msg = {
                .addr = 0x6b,
-- 
2.20.1