This is a note to let you know that I've just added the patch titled mmc: ushc: fix NULL-deref at probe 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: mmc-ushc-fix-null-deref-at-probe.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@xxxxxxxxxxxxxxx> know about it. >From 181302dc7239add8ab1449c23ecab193f52ee6ab Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan@xxxxxxxxxx> Date: Mon, 13 Mar 2017 13:40:22 +0100 Subject: mmc: ushc: fix NULL-deref at probe From: Johan Hovold <johan@xxxxxxxxxx> commit 181302dc7239add8ab1449c23ecab193f52ee6ab upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Fixes: 53f3a9e26ed5 ("mmc: USB SD Host Controller (USHC) driver") Cc: David Vrabel <david.vrabel@xxxxxxx> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/mmc/host/ushc.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/mmc/host/ushc.c +++ b/drivers/mmc/host/ushc.c @@ -426,6 +426,9 @@ static int ushc_probe(struct usb_interfa struct ushc_data *ushc; int ret; + if (intf->cur_altsetting->desc.bNumEndpoints < 1) + return -ENODEV; + mmc = mmc_alloc_host(sizeof(struct ushc_data), &intf->dev); if (mmc == NULL) return -ENOMEM; Patches currently in stable-queue which might be from johan@xxxxxxxxxx are queue-4.4/usb-serial-option-add-quectel-uc15-uc20-ec21-and-ec25-modems.patch queue-4.4/input-ims-pcu-validate-number-of-endpoints-before-using-them.patch queue-4.4/input-cm109-validate-number-of-endpoints-before-using-them.patch queue-4.4/input-iforce-validate-number-of-endpoints-before-using-them.patch queue-4.4/mmc-ushc-fix-null-deref-at-probe.patch queue-4.4/input-kbtab-validate-number-of-endpoints-before-using-them.patch queue-4.4/input-sur40-validate-number-of-endpoints-before-using-them.patch queue-4.4/uwb-i1480-dfu-fix-null-deref-at-probe.patch queue-4.4/input-hanwang-validate-number-of-endpoints-before-using-them.patch queue-4.4/usb-idmouse-fix-null-deref-at-probe.patch queue-4.4/uwb-hwa-rc-fix-null-deref-at-probe.patch queue-4.4/usb-lvtest-fix-null-deref-at-probe.patch queue-4.4/input-yealink-validate-number-of-endpoints-before-using-them.patch queue-4.4/usb-serial-qcserial-add-dell-dw5811e.patch queue-4.4/usb-uss720-fix-null-deref-at-probe.patch queue-4.4/usb-wusbcore-fix-null-deref-at-probe.patch