cfg80211: nl80211_update_ft_ies() to validate NL80211_ATTR_IE
nl80211_update_ft_ies() tried to validate NL80211_ATTR_IE with is_valid_ie_attr() before dereferencing it, but that helper function returns true in case of NULL pointer (i.e., attribute not included). This can result to dereferencing a NULL pointer. Fix that by explicitly checking that NL80211_ATTR_IE is included. Fixes: 355199e0 ("cfg80211: Extend support for IEEE 802.11r Fast BSS Transition") Signed-off-by: NArunk Khandavalli <akhandav@codeaurora.org> Signed-off-by: NJouni Malinen <jouni@codeaurora.org> Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
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