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Commit 6c739419 authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

nl80211: fix HT capability attribute validation 



Since the NL80211_ATTR_HT_CAPABILITY attribute is
used as a struct, it needs a minimum, not maximum
length. Enforce that properly. Not doing so could
potentially lead to reading after the buffer.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 3432f923

net/wireless/nl80211.c

+1 −2
Original line number Diff line number Diff line
@@ -132,8 +132,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = { 
	[NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },

	[NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },



	[NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,

					 .len = NL80211_HT_CAPABILITY_LEN },

	[NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },



	[NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },

	[NL80211_ATTR_IE] = { .type = NLA_BINARY,