From: Johannes Berg Date: Thu, 26 Mar 2020 14:51:35 +0000 (+0100) Subject: mac80211: mark station unauthorized before key removal X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1ec47ff0525c4a530dc7783cb28044179334a4cc;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git mac80211: mark station unauthorized before key removal commit b16798f5b907733966fd1a558fca823b3c67e4a1 upstream. 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: Johannes Berg Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 627dc642f894..77ab9cc1a230 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -3,6 +3,7 @@ * Copyright 2006-2007 Jiri Benc * Copyright 2013-2014 Intel Mobile Communications GmbH * Copyright (C) 2015 - 2017 Intel Deutschland GmbH + * Copyright (C) 2018-2020 Intel Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -951,6 +952,11 @@ 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);