From b9731062ce8afd35cf723bf3a8ad55d208f915a5 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Mon, 20 Sep 2021 15:40:05 +0200
Subject: [PATCH] mac80211: mesh: fix potentially unaligned access
Git-commit: b9731062ce8afd35cf723bf3a8ad55d208f915a5
References: git-fixes
Patch-mainline: v5.15-rc4
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: Oliver Neukum <oneukum@suse.com>
---
net/mac80211/mesh_ps.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/mac80211/mesh_ps.c
+++ b/net/mac80211/mesh_ps.c
@@ -587,7 +587,7 @@ void ieee80211_mps_frame_release(struct
/* 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))