tree 18ff065307036e11be9a7560b6ee192988d2ba33
parent 42d98e02193d163c1523a8840a2effcc4c6eb111
author Mathy Vanhoef <Mathy.Vanhoef@kuleuven.be> 1620756164 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1622703629 +0200

mac80211: properly handle A-MSDUs that start with an RFC 1042 header

commit a1d5ff5651ea592c67054233b14b30bf4452999c upstream.

Properly parse A-MSDUs whose first 6 bytes happen to equal a rfc1042
header. This can occur in practice when the destination MAC address
equals AA:AA:03:00:00:00. More importantly, this simplifies the next
patch to mitigate A-MSDU injection attacks.

Cc: stable@vger.kernel.org
Signed-off-by: Mathy Vanhoef <Mathy.Vanhoef@kuleuven.be>
Link: https://lore.kernel.org/r/20210511200110.0b2b886492f0.I23dd5d685fe16d3b0ec8106e8f01b59f499dffed@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>