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From: Alexander Motin <mav@FreeBSD.org>
Date: Thu, 18 Aug 2016 11:02:42 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r304408 - stable/10/sys/dev/ntb/if_ntb
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Author: mav
Date: Thu Aug 18 11:02:42 2016
New Revision: 304408
URL: https://svnweb.freebsd.org/changeset/base/304408

Log:
  MFC r303553: Make MAC address generation more random.
  
  'ticks' approach does not work at boot time.

Modified:
  stable/10/sys/dev/ntb/if_ntb/if_ntb.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/dev/ntb/if_ntb/if_ntb.c
==============================================================================
--- stable/10/sys/dev/ntb/if_ntb/if_ntb.c	Thu Aug 18 11:02:01 2016	(r304407)
+++ stable/10/sys/dev/ntb/if_ntb/if_ntb.c	Thu Aug 18 11:02:42 2016	(r304408)
@@ -493,10 +493,9 @@ static void
 create_random_local_eui48(u_char *eaddr)
 {
 	static uint8_t counter = 0;
-	uint32_t seed = ticks;
 
 	eaddr[0] = EUI48_LOCALLY_ADMINISTERED;
-	memcpy(&eaddr[1], &seed, sizeof(uint32_t));
+	arc4rand(&eaddr[1], 4, 0);
 	eaddr[5] = counter++;
 }