linux-kernel - [PATCH 3.12 04/72] iwlwifi: mvm: fix D3 firmware PN programming

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Message-Id: <bcbe2559b52ccc3ab911e939ef50d0f0074ab442.1448283890.git.jslaby@suse.cz>
Date:	Mon, 23 Nov 2015 14:07:07 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Johannes Berg <johannes.berg@...el.com>,
	Luca Coelho <luciano.coelho@...el.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 04/72] iwlwifi: mvm: fix D3 firmware PN programming

From: Johannes Berg <johannes.berg@...el.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 2cf5eb3ab7bb7f2e3a70edcef236cd62c87db030 upstream.

The code to send the RX PN data (for each TID) to the firmware
has a devastating bug: it overwrites the data for TID 0 with
all the TID data, leaving the remaining TIDs zeroed. This will
allow replays to actually be accepted by the firmware, which
could allow waking up the system.

Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Luca Coelho <luciano.coelho@...el.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/net/wireless/iwlwifi/mvm/d3.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/mvm/d3.c b/drivers/net/wireless/iwlwifi/mvm/d3.c
index 417639f77b01..a25f608d8ab4 100644
--- a/drivers/net/wireless/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/iwlwifi/mvm/d3.c
@@ -296,12 +296,12 @@ static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 			u8 *pn = seq.ccmp.pn;
 
 			ieee80211_get_key_rx_seq(key, i, &seq);
-			aes_sc->pn = cpu_to_le64((u64)pn[5] |
-						 ((u64)pn[4] << 8) |
-						 ((u64)pn[3] << 16) |
-						 ((u64)pn[2] << 24) |
-						 ((u64)pn[1] << 32) |
-						 ((u64)pn[0] << 40));
+			aes_sc[i].pn = cpu_to_le64((u64)pn[5] |
+						   ((u64)pn[4] << 8) |
+						   ((u64)pn[3] << 16) |
+						   ((u64)pn[2] << 24) |
+						   ((u64)pn[1] << 32) |
+						   ((u64)pn[0] << 40));
 		}
 		data->use_rsc_tsc = true;
 		break;
-- 
2.6.3

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