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Commit e3d4030498c3 ("mac80211: do not accept/forward invalid EAPOL frames") uses skb_mac_header() before eth_type_trans() is called leading to incorrect pointer, the pointer gets written to. This issue has appeared during backporting to 4.4, 4.9 and 4.14. Fixes: e3d4030498c3 ("mac80211: do not accept/forward invalid EAPOL frames") Link: https://lore.kernel.org/r/CAHQn7pKcyC_jYmGyTcPCdk9xxATwW5QPNph=bsZV8d-HPwNsyA@mail.gmail.com Cc: <stable@vger.kernel.org> # 4.4.x Signed-off-by: Davis Mosenkovs <davis@mosenkovs.lv> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>