cfg80211: Define nla_policy for NL80211_ATTR_LOCAL_MESH_POWER_MODE
authorSrinivas Dasari <dasaris@qti.qualcomm.com>
Thu, 6 Jul 2017 22:43:41 +0000 (01:43 +0300)
committerJohannes Berg <johannes.berg@intel.com>
Fri, 7 Jul 2017 09:23:03 +0000 (11:23 +0200)
commit8feb69c7bd89513be80eb19198d48f154b254021
tree5df59b1e2564cc1b12abd0e4677cacb4b623d8ea
parent0a27844ce86d039d74221dd56cd8c0349b146b63
cfg80211: Define nla_policy for NL80211_ATTR_LOCAL_MESH_POWER_MODE

Buffer overread may happen as nl80211_set_station() reads 4 bytes
from the attribute NL80211_ATTR_LOCAL_MESH_POWER_MODE without
validating the size of data received when userspace sends less
than 4 bytes of data with NL80211_ATTR_LOCAL_MESH_POWER_MODE.
Define nla_policy for NL80211_ATTR_LOCAL_MESH_POWER_MODE to avoid
the buffer overread.

Fixes: 3b1c5a5307f ("{cfg,nl}80211: mesh power mode primitives and userspace access")
Cc: stable@vger.kernel.org
Signed-off-by: Srinivas Dasari <dasaris@qti.qualcomm.com>
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
net/wireless/nl80211.c