From 6c7394197af90f6a332180e33f5d025d3037d883 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 3 Nov 2011 09:27:01 +0100 Subject: [PATCH] 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: Johannes Berg Signed-off-by: John W. Linville --- net/wireless/nl80211.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 48260c2d092a..b587857a9d7d 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -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,