Patch "[media] dib0700: fix NULL-deref at probe" has been added to the 4.9-stable tree

Patch "[media] dib0700: fix NULL-deref at probe" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    [media] dib0700: fix NULL-deref at probe

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     dib0700-fix-null-deref-at-probe.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From d5823511c0f8719a39e72ede1bce65411ac653b7 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Mon, 13 Mar 2017 09:53:54 -0300
Subject: [media] dib0700: fix NULL-deref at probe

From: Johan Hovold <johan@kernel.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@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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
@@ -812,6 +812,9 @@ 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)
 		return -ENOMEM;


Patches currently in stable-queue which might be from johan@kernel.org are

queue-4.9/cx231xx-audio-fix-null-deref-at-probe.patch
queue-4.9/usb-serial-io_ti-fix-div-by-zero-in-set_termios.patch
queue-4.9/usb-chaoskey-fix-alea-quirk-on-big-endian-hosts.patch
queue-4.9/usb-hub-fix-non-ss-hub-descriptor-handling.patch
queue-4.9/cx231xx-cards-fix-null-deref-at-probe.patch
queue-4.9/usb-serial-ftdi_sio-add-olimex-arm-usb-tiny-h-pids.patch
queue-4.9/usb-serial-ftdi_sio-fix-setting-latency-for-unprivileged-users.patch
queue-4.9/usb-iowarrior-fix-info-ioctl-on-big-endian-hosts.patch
queue-4.9/watchdog-pcwd_usb-fix-null-deref-at-probe.patch
queue-4.9/gspca-konica-add-missing-endpoint-sanity-check.patch
queue-4.9/usb-serial-qcserial-add-more-lenovo-em74xx-device-ids.patch
queue-4.9/usb-serial-option-add-telit-me910-support.patch
queue-4.9/net-irda-irda-usb-fix-firmware-name-on-big-endian-hosts.patch
queue-4.9/dib0700-fix-null-deref-at-probe.patch
queue-4.9/cx231xx-audio-fix-init-error-path.patch
queue-4.9/of-fdt-add-missing-allocation-failure-check.patch
queue-4.9/usbvision-fix-null-deref-at-probe.patch
queue-4.9/usb-serial-mct_u232-fix-big-endian-baud-rate-handling.patch
queue-4.9/mceusb-fix-null-deref-at-probe.patch
queue-4.9/usb-hub-fix-ss-hub-descriptor-handling.patch
queue-4.9/ath9k_htc-fix-null-deref-at-probe.patch
queue-4.9/usb-musb-fix-trying-to-suspend-while-active-for-otg-configurations.patch