Patch "[media] gspca: konica: add missing endpoint sanity check" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

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

    [media] gspca: konica: add missing endpoint sanity check

to the 4.4-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:
     gspca-konica-add-missing-endpoint-sanity-check.patch
and it can be found in the queue-4.4 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 aa58fedb8c7b6cf2f05941d238495f9e2f29655c Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Mon, 13 Mar 2017 09:53:59 -0300
Subject: [media] gspca: konica: add missing endpoint sanity check

From: Johan Hovold <johan@kernel.org>

commit aa58fedb8c7b6cf2f05941d238495f9e2f29655c upstream.

Make sure to check the number of endpoints to avoid accessing memory
beyond the endpoint array should a device lack the expected endpoints.

Note that, as far as I can tell, the gspca framework has already made
sure there is at least one endpoint in the current alternate setting so
there should be no risk for a NULL-pointer dereference here.

Fixes: b517af722860 ("V4L/DVB: gspca_konica: New gspca subdriver for
konica chipset using cams")

Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/media/usb/gspca/konica.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/media/usb/gspca/konica.c
+++ b/drivers/media/usb/gspca/konica.c
@@ -188,6 +188,9 @@ static int sd_start(struct gspca_dev *gs
 		return -EIO;
 	}
 
+	if (alt->desc.bNumEndpoints < 2)
+		return -ENODEV;
+
 	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
 
 	n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;


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

queue-4.4/cx231xx-audio-fix-null-deref-at-probe.patch
queue-4.4/usb-serial-io_ti-fix-div-by-zero-in-set_termios.patch
queue-4.4/usb-hub-fix-non-ss-hub-descriptor-handling.patch
queue-4.4/cx231xx-cards-fix-null-deref-at-probe.patch
queue-4.4/usb-serial-ftdi_sio-add-olimex-arm-usb-tiny-h-pids.patch
queue-4.4/usb-serial-ftdi_sio-fix-setting-latency-for-unprivileged-users.patch
queue-4.4/usb-iowarrior-fix-info-ioctl-on-big-endian-hosts.patch
queue-4.4/watchdog-pcwd_usb-fix-null-deref-at-probe.patch
queue-4.4/gspca-konica-add-missing-endpoint-sanity-check.patch
queue-4.4/usb-serial-qcserial-add-more-lenovo-em74xx-device-ids.patch
queue-4.4/usb-serial-option-add-telit-me910-support.patch
queue-4.4/net-irda-irda-usb-fix-firmware-name-on-big-endian-hosts.patch
queue-4.4/dib0700-fix-null-deref-at-probe.patch
queue-4.4/cx231xx-audio-fix-init-error-path.patch
queue-4.4/usbvision-fix-null-deref-at-probe.patch
queue-4.4/usb-serial-mct_u232-fix-big-endian-baud-rate-handling.patch
queue-4.4/mceusb-fix-null-deref-at-probe.patch
queue-4.4/usb-hub-fix-ss-hub-descriptor-handling.patch
queue-4.4/ath9k_htc-fix-null-deref-at-probe.patch