svn commit: r304719 - releng/11.0/sys/net80211

[Bryan Drewery]

Author: bdrewery
Date: Wed Aug 24 02:31:03 2016
New Revision: 304719
URL: https://svnweb.freebsd.org/changeset/base/304719

Log:
  MFS r304715:
  
    MFC r304322:
  
      [net80211] correctly lock the ifp before accessing the lladdr.
  
  Approved by:	re (gjb)

Modified:
  releng/11.0/sys/net80211/ieee80211_ioctl.c
Directory Properties:
  releng/11.0/   (props changed)

Modified: releng/11.0/sys/net80211/ieee80211_ioctl.c
==============================================================================
--- releng/11.0/sys/net80211/ieee80211_ioctl.c	Wed Aug 24 02:29:25 2016	(r304718)
+++ releng/11.0/sys/net80211/ieee80211_ioctl.c	Wed Aug 24 02:31:03 2016	(r304719)
@@ -3394,10 +3394,12 @@ ieee80211_ioctl(struct ifnet *ifp, u_lon
 			 * Check if the MAC address was changed
 			 * via SIOCSIFLLADDR ioctl.
 			 */
+			if_addr_rlock(ifp);
 			if ((ifp->if_flags & IFF_UP) == 0 &&
 			    !IEEE80211_ADDR_EQ(vap->iv_myaddr, IF_LLADDR(ifp)))
 				IEEE80211_ADDR_COPY(vap->iv_myaddr,
 				    IF_LLADDR(ifp));
+			if_addr_runlock(ifp);
 		}
 		break;
 	case SIOCADDMULTI: