linux-kernel - [PATCH] media: dvb-usb: fix ununit-value in az6027_rc

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Message-Id: <20210813143420.20724-1-paskripkin@gmail.com>
Date:   Fri, 13 Aug 2021 17:34:20 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     mchehab@...nel.org, manu@...uxtv.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pavel Skripkin <paskripkin@...il.com>,
        syzbot+2cd8c5db4a85f0a04142@...kaller.appspotmail.com
Subject: [PATCH] media: dvb-usb: fix ununit-value in az6027_rc_query

Syzbot reported ununit-value bug in az6027_rc_query(). The problem was
in missing state pointer initialization. Since this funtion does nothing
we can simply initialize state to REMOTE_NO_KEY_PRESSED.

Fixes: 76f9a820c867 ("V4L/DVB: AZ6027: Initial import of the driver")
Reported-and-tested-by: syzbot+2cd8c5db4a85f0a04142@...kaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@...il.com>
---
 drivers/media/usb/dvb-usb/az6027.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/usb/dvb-usb/az6027.c b/drivers/media/usb/dvb-usb/az6027.c
index 1c39b61cde29..86788771175b 100644
--- a/drivers/media/usb/dvb-usb/az6027.c
+++ b/drivers/media/usb/dvb-usb/az6027.c
@@ -391,6 +391,7 @@ static struct rc_map_table rc_map_az6027_table[] = {
 /* remote control stuff (does not work with my box) */
 static int az6027_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 {
+	*state = REMOTE_NO_KEY_PRESSED;
 	return 0;
 }
 
-- 
2.32.0