svn commit: r359746 - stable/11/sys/net80211

[Eugene Grosbein]

Author: eugen
Date: Thu Apr  9 15:30:21 2020
New Revision: 359746
URL: https://svnweb.freebsd.org/changeset/base/359746

Log:
  net80211: fix another possible panic for some drivers
  
  This change fixes another case for panic missed in r343035
  and seen with run(4)-based system. This is direct commit to stable/11
  because r306591 could not be merged due to differences in KPI.
  Note that stable/12 has this problem fixed already.

Modified:
  stable/11/sys/net80211/ieee80211_amrr.c

Modified: stable/11/sys/net80211/ieee80211_amrr.c
==============================================================================
--- stable/11/sys/net80211/ieee80211_amrr.c	Thu Apr  9 14:44:46 2020	(r359745)
+++ stable/11/sys/net80211/ieee80211_amrr.c	Thu Apr  9 15:30:21 2020	(r359746)
@@ -409,6 +409,9 @@ amrr_tx_update(const struct ieee80211vap *vap, const s
 	struct ieee80211_amrr_node *amn = ni->ni_rctls;
 	int txcnt = *(int *)arg1, success = *(int *)arg2, retrycnt = *(int *)arg3;
 
+	if (!amn)
+		return;
+
 	amn->amn_txcnt = txcnt;
 	amn->amn_success = success;
 	amn->amn_retrycnt = retrycnt;