From: Johannes Berg johannes.berg@intel.com
[ 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.Ib6a2ff9e9cc9bc6fca50f... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/mac80211/mesh_ps.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/mesh_ps.c b/net/mac80211/mesh_ps.c index 204830a55240..3fbd0b9ff913 100644 --- 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))