tree cc7570d4c5ad589540743a5ffdb0a26c701862da
parent 608c4adfcabab220142ee335a2a003ccd1c0b25b
author Mateusz Jurczyk <mjurczyk@google.com> 1495622546 +0200
committer Samuel Ortiz <sameo@linux.intel.com> 1498170519 +0200

nfc: Ensure presence of required attributes in the activate_target handler

Check that the NFC_ATTR_TARGET_INDEX and NFC_ATTR_PROTOCOLS attributes (in
addition to NFC_ATTR_DEVICE_INDEX) are provided by the netlink client
prior to accessing them. This prevents potential unhandled NULL pointer
dereference exceptions which can be triggered by malicious user-mode
programs, if they omit one or both of these attributes.

Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>