This is a note to let you know that I've just added the patch titled staging: rtl8188eu: prevent an underflow in rtw_check_beacon_data() 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: staging-rtl8188eu-prevent-an-underflow-in-rtw_check_beacon_data.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 784047eb2d3405a35087af70cba46170c5576b25 Mon Sep 17 00:00:00 2001 From: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Date: Sat, 22 Apr 2017 13:47:23 +0300 Subject: staging: rtl8188eu: prevent an underflow in rtw_check_beacon_data() From: Dan Carpenter <dan.carpenter@xxxxxxxxxx> commit 784047eb2d3405a35087af70cba46170c5576b25 upstream. The "len" could be as low as -14 so we should check for negatives. Fixes: 9a7fe54ddc3a ("staging: r8188eu: Add source files for new driver - part 1") Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/staging/rtl8188eu/core/rtw_ap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/staging/rtl8188eu/core/rtw_ap.c +++ b/drivers/staging/rtl8188eu/core/rtw_ap.c @@ -890,7 +890,7 @@ int rtw_check_beacon_data(struct adapter return _FAIL; - if (len > MAX_IE_SZ) + if (len < 0 || len > MAX_IE_SZ) return _FAIL; pbss_network->IELength = len; Patches currently in stable-queue which might be from dan.carpenter@xxxxxxxxxx are queue-4.9/misc-mic-double-free-on-ioctl-error-path.patch queue-4.9/drivers-misc-c2port-c2port-duramar2150.c-checking-for-null-instead-of-is_err.patch queue-4.9/iio-adc-ti_am335x_adc-allocating-too-much-in-probe.patch queue-4.9/staging-rtl8188eu-prevent-an-underflow-in-rtw_check_beacon_data.patch