wifi: mac80211: Check 802.11 encaps offloading in ieee80211_tx_h_select_key()

[ Upstream commit 4037c468 ]

With 802.11 encapsulation offloading, ieee80211_tx_h_select_key() is
called on 802.3 frames. In that case do not try to use skb data as
valid 802.11 headers.

Reported-by: Bert Karwatzki <spasswolf@web.de>
Closes: https://lore.kernel.org/linux-wireless/20250410215527.3001-1-spasswolf@web.de


Fixes: bb42f2d1 ("mac80211: Move reorder-sensitive TX handlers to after TXQ dequeue")
Signed-off-by: Remi Pommarel <repk@triplefau.lt>
Link: https://patch.msgid.link/1af4b5b903a5fca5ebe67333d5854f93b2be5abe.1752765971.git.repk@triplefau.lt


Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>