This is a note to let you know that I've just added the patch titled [media] usbvision: 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: usbvision-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@xxxxxxxxxxxxxxx> know about it. >From eacb975b48272f54532b62f515a3cf7eefa35123 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan@xxxxxxxxxx> Date: Mon, 13 Mar 2017 09:53:55 -0300 Subject: [media] usbvision: fix NULL-deref at probe From: Johan Hovold <johan@xxxxxxxxxx> commit eacb975b48272f54532b62f515a3cf7eefa35123 upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer or accessing memory beyond the endpoint array should a malicious device lack the expected endpoints. Fixes: 2a9f8b5d25be ("V4L/DVB (5206): Usbvision: set alternate interface modification") Cc: Thierry MERLE <thierry.merle@xxxxxxx> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/media/usb/usbvision/usbvision-video.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) --- a/drivers/media/usb/usbvision/usbvision-video.c +++ b/drivers/media/usb/usbvision/usbvision-video.c @@ -1506,7 +1506,14 @@ static int usbvision_probe(struct usb_in } for (i = 0; i < usbvision->num_alt; i++) { - u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc. + u16 tmp; + + if (uif->altsetting[i].desc.bNumEndpoints < 2) { + ret = -ENODEV; + goto err_pkt; + } + + tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc. wMaxPacketSize); usbvision->alt_max_pkt_size[i] = (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); Patches currently in stable-queue which might be from johan@xxxxxxxxxx are 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/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/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/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/usb-ehci-platform-fix-companion-device-leak.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