linux-kernel - Re: [syzbot] [media?] KMSAN: uninit-value in cxusb_i2c

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Message-ID: <tencent_7B7B46D79363637D4967A3BDE448F772D705@qq.com>
Date: Sat,  5 Apr 2025 17:02:09 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+526bd95c0ec629993bf3@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [media?] KMSAN: uninit-value in cxusb_i2c_xfer

#syz test

diff --git a/drivers/media/usb/dvb-usb/cxusb.c b/drivers/media/usb/dvb-usb/cxusb.c
index f44529b40989..d0501c1e81d6 100644
--- a/drivers/media/usb/dvb-usb/cxusb.c
+++ b/drivers/media/usb/dvb-usb/cxusb.c
@@ -119,9 +119,8 @@ static void cxusb_gpio_tuner(struct dvb_usb_device *d, int onoff)
 
 	o[0] = GPIO_TUNER;
 	o[1] = onoff;
-	cxusb_ctrl_msg(d, CMD_GPIO_WRITE, o, 2, &i, 1);
 
-	if (i != 0x01)
+	if (!cxusb_ctrl_msg(d, CMD_GPIO_WRITE, o, 2, &i, 1) && i != 0x01)
 		dev_info(&d->udev->dev, "gpio_write failed.\n");
 
 	st->gpio_write_state[GPIO_TUNER] = onoff;
-- 
2.43.0