staging: rtl8188eu: prevent an underflow in rtw_check_beacon_data()
authorDan Carpenter <dan.carpenter@oracle.com>
Sat, 22 Apr 2017 10:47:23 +0000 (13:47 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 26 Jun 2017 05:13:09 +0000 (07:13 +0200)
commit0c967139e8320293819277b0dddf401192b5649f
tree4f6aace7a4ee39627c99f8297b4f47e7ac1233b0
parente59d91144545ee6810593fdb69d2df82f61f46a6
staging: rtl8188eu: prevent an underflow in rtw_check_beacon_data()

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@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/rtl8188eu/core/rtw_ap.c