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mac80211: mesh: fix potentially unaligned access
author
Johannes Berg
<johannes.berg@intel.com>
Mon, 20 Sep 2021 13:40:05 +0000
(15:40 +0200)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Wed, 6 Oct 2021 13:55:52 +0000
(15:55 +0200)
[ Upstream commit
b9731062ce8afd35cf723bf3a8ad55d208f915a5
]
The pointer here points directly into the frame, so the
access is potentially unaligned. Use get_unaligned_le16
to avoid that.
Fixes:
3f52b7e328c5
("mac80211: mesh power save basics")
Link:
https://lore.kernel.org/r/20210920154009.3110ff75be0c.Ib6a2ff9e9cc9bc6fca50fce631ec1ce725cc926b@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
net/mac80211/mesh_ps.c
patch
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diff --git
a/net/mac80211/mesh_ps.c
b/net/mac80211/mesh_ps.c
index
204830a
..
3fbd0b9
100644
(file)
--- a/
net/mac80211/mesh_ps.c
+++ b/
net/mac80211/mesh_ps.c
@@
-2,6
+2,7
@@
/*
* Copyright 2012-2013, Marco Porsch <marco.porsch@s2005.tu-chemnitz.de>
* Copyright 2012-2013, cozybit Inc.
+ * Copyright (C) 2021 Intel Corporation
*/
#include "mesh.h"
@@
-588,7
+589,7
@@
void ieee80211_mps_frame_release(struct sta_info *sta,
/* only transmit to PS STA with announced, non-zero awake window */
if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
- (!elems->awake_window || !
le16_to_cpu(*
elems->awake_window)))
+ (!elems->awake_window || !
get_unaligned_le16(
elems->awake_window)))
return;
if (!test_sta_flag(sta, WLAN_STA_MPSP_OWNER))