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: 3b1c5a5 ("{cfg,nl}80211: mesh power mode primitives and userspace access") Cc: [email protected] Signed-off-by: Srinivas Dasari <[email protected]> Signed-off-by: Jouni Malinen <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
fracktal · Jul 7, 2017 · 8feb69c · 8feb69c
1 parent 0a27844
commit 8feb69c
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
@@ -347,6 +347,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 	[NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 	[NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 	[NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
+	[NL80211_ATTR_LOCAL_MESH_POWER_MODE] = {. type = NLA_U32 },
 	[NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 	[NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 	[NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },