linux-kernel - [PATCH 4.9 081/206] [media] dibusb: fix possible memory leak in dibusb_rc

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Message-Id: <20170110131506.306529599@linuxfoundation.org>
Date:   Tue, 10 Jan 2017 14:36:04 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Wei Yongjun <weiyongjun1@...wei.com>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>
Subject: [PATCH 4.9 081/206] [media] dibusb: fix possible memory leak in dibusb_rc_query()

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Yongjun <weiyongjun1@...wei.com>

commit 1f5ecaf985c46889278f51fcb7bc143f60f4eb14 upstream.

'buf' is malloced in dibusb_rc_query() and should be freed before
leaving from the error handling cases, otherwise it will cause
memory leak.

Fixes: ff1c123545d7 ("[media] dibusb: handle error code on RC query")

Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/usb/dvb-usb/dibusb-common.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/usb/dvb-usb/dibusb-common.c
+++ b/drivers/media/usb/dvb-usb/dibusb-common.c
@@ -382,9 +382,9 @@ int dibusb_rc_query(struct dvb_usb_devic
 	if (buf[0] != 0)
 		deb_info("key: %*ph\n", 5, buf);
 
+ret:
 	kfree(buf);
 
-ret:
 	return ret;
 }
 EXPORT_SYMBOL(dibusb_rc_query);