From: Eliad Peller <eliad@wizery.com>
Date: Thu, 17 Jul 2014 12:00:56 +0000 (+0300)
Subject: cfg80211: fix mic_failure tracing
X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=201c26e77bfc4064afc6a630fc336a825047be7b;p=linux-edison.git

cfg80211: fix mic_failure tracing

commit 8c26d458394be44e135d1c6bd4557e1c4e1a0535 upstream.

tsc can be NULL (mac80211 currently always passes NULL),
resulting in NULL-dereference. check before copying it.

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index 5755bc14abb..bc5a75b1aef 100644
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -1972,7 +1972,8 @@ TRACE_EVENT(cfg80211_michael_mic_failure,
 		MAC_ASSIGN(addr, addr);
 		__entry->key_type = key_type;
 		__entry->key_id = key_id;
-		memcpy(__entry->tsc, tsc, 6);
+		if (tsc)
+			memcpy(__entry->tsc, tsc, 6);
 	),
 	TP_printk(NETDEV_PR_FMT ", " MAC_PR_FMT ", key type: %d, key id: %d, tsc: %pm",
 		  NETDEV_PR_ARG, MAC_PR_ARG(addr), __entry->key_type,