linux-kernel - Re: [syzbot] [usb?] WARNING in gl861_ctrl_msg/usb_submit

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Message-ID: <20250519155603.2364004-1-n.zhandarovich@fintech.ru>
Date: Mon, 19 May 2025 18:56:02 +0300
From: Nikita Zhandarovich <n.zhandarovich@...tech.ru>
To: <syzbot+721071c10f3c7e4e5dcb@...kaller.appspotmail.com>
CC: Nikita Zhandarovich <n.zhandarovich@...tech.ru>,
	<syzkaller-bugs@...glegroups.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [syzbot] [usb?] WARNING in gl861_ctrl_msg/usb_submit_urb

#syz test

---
 drivers/media/usb/dvb-usb-v2/dvb_usb_core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c b/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c
index f1c79f351ec8..5c76116fd565 100644
--- a/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c
+++ b/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c
@@ -19,6 +19,10 @@ module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage,
 MODULE_PARM_DESC(force_pid_filter_usage,
 		"force all DVB USB devices to use a PID filter, if any (default: 0)");
 
+static const struct i2c_adapter_quirks i2c_usb_quirks = {
+	.flags = I2C_AQ_NO_ZERO_LEN_READ,
+};
+
 static int dvb_usbv2_download_firmware(struct dvb_usb_device *d,
 		const char *name)
 {
@@ -63,6 +67,7 @@ static int dvb_usbv2_i2c_init(struct dvb_usb_device *d)
 
 	strscpy(d->i2c_adap.name, d->name, sizeof(d->i2c_adap.name));
 	d->i2c_adap.algo = d->props->i2c_algo;
+	d->i2c_adap.quirks = &i2c_usb_quirks;
 	d->i2c_adap.dev.parent = &d->udev->dev;
 	i2c_set_adapdata(&d->i2c_adap, d);