mac80211: mark station unauthorized before key removal (b16798f5) · Commits · 戴 / test

If a station is still marked as authorized, mark it as no longer so before removing its keys. This allows frames transmitted to it to be rejected, providing additional protection against leaking plain text data during the disconnection flow. Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200326155133.ccb4fb0bb356.If48f0f0504efdcf16b8921f48c6d3bb2cb763c99@changeid Signed-off-by:

net/mac80211/sta_info.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -4,7 +4,7 @@
		* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
		* Copyright 2013-2014 Intel Mobile Communications GmbH
		* Copyright (C) 2015 - 2017 Intel Deutschland GmbH
		* Copyright (C) 2018-2019 Intel Corporation
		* Copyright (C) 2018-2020 Intel Corporation
		*/

		#include <linux/module.h>
		@@ -1049,6 +1049,11 @@ static void __sta_info_destroy_part2(struct sta_info *sta)
		might_sleep();
		lockdep_assert_held(&local->sta_mtx);

		while (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
		ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
		WARN_ON_ONCE(ret);
		}

		/* now keys can no longer be reached */
		ieee80211_free_sta_keys(local, sta);