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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Dinghao Liu <dinghao.liu@zju.edu.cn>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.4 087/340] media: tm6000: Fix memleak in tm6000_start_stream
Date:   Mon,  1 Mar 2021 17:10:31 +0100
Message-Id: <20210301161052.605156521@linuxfoundation.org>
In-Reply-To: <20210301161048.294656001@linuxfoundation.org>
References: <20210301161048.294656001@linuxfoundation.org>
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From: Dinghao Liu <dinghao.liu@zju.edu.cn>

[ Upstream commit 76aaf8a96771c16365b8510f1fb97738dc88026e ]

When usb_clear_halt() fails, dvb->bulk_urb->transfer_buffer
and dvb->bulk_urb should be freed just like when
usb_submit_urb() fails.

Fixes: 3169c9b26fffa ("V4L/DVB (12788): tm6000: Add initial DVB-T support")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/usb/tm6000/tm6000-dvb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/usb/tm6000/tm6000-dvb.c b/drivers/media/usb/tm6000/tm6000-dvb.c
index 19c90fa9e443d..293a460f4616c 100644
--- a/drivers/media/usb/tm6000/tm6000-dvb.c
+++ b/drivers/media/usb/tm6000/tm6000-dvb.c
@@ -141,6 +141,10 @@ static int tm6000_start_stream(struct tm6000_core *dev)
 	if (ret < 0) {
 		printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
 							ret, __func__);
+
+		kfree(dvb->bulk_urb->transfer_buffer);
+		usb_free_urb(dvb->bulk_urb);
+		dvb->bulk_urb = NULL;
 		return ret;
 	} else
 		printk(KERN_ERR "tm6000: pipe reset\n");
-- 
2.27.0