cfg80211: fix mic_failure tracing

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

Cc: stable@vger.kernel.org
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>

diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index 560ed77..7cc887f 100644 (file)
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -2094,7 +2094,8 @@ 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,