[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20170523200902.604392684@linuxfoundation.org>
Date: Tue, 23 May 2017 22:09:39 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Mauro Carvalho Chehab <mchehab@...nel.org>,
Johan Hovold <johan@...nel.org>,
Hans Verkuil <hans.verkuil@...co.com>,
Mauro Carvalho Chehab <mchehab@...pensource.com>
Subject: [PATCH 4.4 073/103] [media] dib0700: fix NULL-deref at probe
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <johan@...nel.org>
commit d5823511c0f8719a39e72ede1bce65411ac653b7 upstream.
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.
Fixes: c4018fa2e4c0 ("[media] dib0700: fix RC support on Hauppauge
Nova-TD")
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
Signed-off-by: Johan Hovold <johan@...nel.org>
Signed-off-by: Hans Verkuil <hans.verkuil@...co.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/media/usb/dvb-usb/dib0700_core.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/media/usb/dvb-usb/dib0700_core.c
+++ b/drivers/media/usb/dvb-usb/dib0700_core.c
@@ -783,6 +783,9 @@ int dib0700_rc_setup(struct dvb_usb_devi
/* Starting in firmware 1.20, the RC info is provided on a bulk pipe */
+ if (intf->altsetting[0].desc.bNumEndpoints < rc_ep + 1)
+ return -ENODEV;
+
purb = usb_alloc_urb(0, GFP_KERNEL);
if (purb == NULL) {
err("rc usb alloc urb failed");
Powered by blists - more mailing lists