wifi: mac80211: fix unaligned le16 access

[ Upstream commit c53d8a5 ]

The AP removal timer field need not be aligned, so the
code shouldn't access it directly, but use unaligned
loads. Use get_unaligned_le16(), which even is shorter
than the current code since it doesn't need a cast.

Fixes: 8eb8dd2 ("wifi: mac80211: Support link removal using Reconfiguration ML element")
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240418105220.356788ba0045.I2b3cdb3644e205d5bb10322c345c0499171cf5d2@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net/mac80211/mlme.c

@@ -5859,7 +5859,7 @@ static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata,
 		 */
 		if (control &
 		    IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT)
-			link_removal_timeout[link_id] = le16_to_cpu(*(__le16 *)pos);
+			link_removal_timeout[link_id] = get_unaligned_le16(pos);
 	}
 
 	removed_links &= sdata->vif.valid_links;