From: Wei Chen <harperchen1110@gmail.com>
To: mchehab@kernel.org
Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
Wei Chen <harperchen1110@gmail.com>
Subject: [PATCH] media: dvb-usb: dw2102: Fix uninit-value in su3000_read_mac_address
Date: Tue, 28 Mar 2023 12:44:16 +0000 [thread overview]
Message-ID: <20230328124416.560889-1-harperchen1110@gmail.com> (raw)
In su3000_read_mac_address, if i2c_transfer fails to execute two
messages, array mac address will not be initialized. Without handling
such error, later in function dvb_usb_adapter_dvb_init, proposed_mac
is accessed before initialization.
Fix this error by returning a negative value if message execution fails.
Signed-off-by: Wei Chen <harperchen1110@gmail.com>
---
drivers/media/usb/dvb-usb/dw2102.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/usb/dvb-usb/dw2102.c b/drivers/media/usb/dvb-usb/dw2102.c
index 0ca764282c76..8747960e6146 100644
--- a/drivers/media/usb/dvb-usb/dw2102.c
+++ b/drivers/media/usb/dvb-usb/dw2102.c
@@ -946,7 +946,7 @@ static int su3000_read_mac_address(struct dvb_usb_device *d, u8 mac[6])
for (i = 0; i < 6; i++) {
obuf[1] = 0xf0 + i;
if (i2c_transfer(&d->i2c_adap, msg, 2) != 2)
- break;
+ return -1;
else
mac[i] = ibuf[0];
}
--
2.25.1
reply other threads:[~2023-03-28 12:44 UTC|newest]
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