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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Emmanuel Grumbach <emmanuel.grumbach@intel.com>,
        Luca Coelho <luciano.coelho@intel.com>,
        Johannes Berg <johannes.berg@intel.com>,
        Sasha Levin <alexander.levin@microsoft.com>
Subject: [PATCH 4.18 063/168] mac80211: shorten the IBSS debug messages
Date:   Mon,  8 Oct 2018 20:30:43 +0200
Message-Id: <20181008175622.444406539@linuxfoundation.org>
In-Reply-To: <20181008175620.043587728@linuxfoundation.org>
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4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

[ Upstream commit c6e57b3896fc76299913b8cfd82d853bee8a2c84 ]

When tracing is enabled, all the debug messages are recorded and must
not exceed MAX_MSG_LEN (100) columns. Longer debug messages grant the
user with:

WARNING: CPU: 3 PID: 32642 at /tmp/wifi-core-20180806094828/src/iwlwifi-stack-dev/net/mac80211/./trace_msg.h:32 trace_event_raw_event_mac80211_msg_event+0xab/0xc0 [mac80211]
Workqueue: phy1 ieee80211_iface_work [mac80211]
 RIP: 0010:trace_event_raw_event_mac80211_msg_event+0xab/0xc0 [mac80211]
 Call Trace:
  __sdata_dbg+0xbd/0x120 [mac80211]
  ieee80211_ibss_rx_queued_mgmt+0x15f/0x510 [mac80211]
  ieee80211_iface_work+0x21d/0x320 [mac80211]

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/mac80211/ibss.c |   22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -947,8 +947,8 @@ static void ieee80211_rx_mgmt_deauth_ibs
 	if (len < IEEE80211_DEAUTH_FRAME_LEN)
 		return;
 
-	ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n",
-		 mgmt->sa, mgmt->da, mgmt->bssid, reason);
+	ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM\n", mgmt->sa, mgmt->da);
+	ibss_dbg(sdata, "\tBSSID=%pM (reason: %d)\n", mgmt->bssid, reason);
 	sta_info_destroy_addr(sdata, mgmt->sa);
 }
 
@@ -966,9 +966,9 @@ static void ieee80211_rx_mgmt_auth_ibss(
 	auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
 	auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
 
-	ibss_dbg(sdata,
-		 "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n",
-		 mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction);
+	ibss_dbg(sdata, "RX Auth SA=%pM DA=%pM\n", mgmt->sa, mgmt->da);
+	ibss_dbg(sdata, "\tBSSID=%pM (auth_transaction=%d)\n",
+		 mgmt->bssid, auth_transaction);
 
 	if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
 		return;
@@ -1175,10 +1175,10 @@ static void ieee80211_rx_bss_info(struct
 		rx_timestamp = drv_get_tsf(local, sdata);
 	}
 
-	ibss_dbg(sdata,
-		 "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
+	ibss_dbg(sdata, "RX beacon SA=%pM BSSID=%pM TSF=0x%llx\n",
 		 mgmt->sa, mgmt->bssid,
-		 (unsigned long long)rx_timestamp,
+		 (unsigned long long)rx_timestamp);
+	ibss_dbg(sdata, "\tBCN=0x%llx diff=%lld @%lu\n",
 		 (unsigned long long)beacon_timestamp,
 		 (unsigned long long)(rx_timestamp - beacon_timestamp),
 		 jiffies);
@@ -1537,9 +1537,9 @@ static void ieee80211_rx_mgmt_probe_req(
 
 	tx_last_beacon = drv_tx_last_beacon(local);
 
-	ibss_dbg(sdata,
-		 "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n",
-		 mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon);
+	ibss_dbg(sdata, "RX ProbeReq SA=%pM DA=%pM\n", mgmt->sa, mgmt->da);
+	ibss_dbg(sdata, "\tBSSID=%pM (tx_last_beacon=%d)\n",
+		 mgmt->bssid, tx_last_beacon);
 
 	if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da))
 		return;