tree 0fa26498af9173f5eddfe41f2ca81a6689fc6963
parent 29cee56c0be46ad01e78af104a06223c65ee0c67
author Rajkumar Manoharan <rmanohar@qti.qualcomm.com> 1494823315 -0700
committer Johannes Berg <johannes.berg@intel.com> 1495023869 +0200

mac80211: strictly check mesh address extension mode

Mesh forwarding path checks for address extension mode to fetch
appropriate proxied address and MPP address. Existing condition
that looks for 6 address format is not strict enough so that
frames with improper values are processed and invalid entries
are added into MPP table. Fix that by adding a stricter check before
processing the packet.

Per IEEE Std 802.11s-2011 spec. Table 7-6g1 lists address extension
mode 0x3 as reserved one. And also Table Table 9-13 does not specify
0x3 as valid address field.

Fixes: 9b395bc3be1c ("mac80211: verify that skb data is present")
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>