[PATCH 3.13 180/259] cfg80211: fix mic_failure tracing

[Kamal Mostafa]

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

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

From: Eliad Peller <eliad@xxxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
 net/wireless/trace.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index ba5f0d6..064b471 100644
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -2029,7 +2029,8 @@ 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,
-- 
1.9.1

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