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From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Mon, 7 Nov 2011 22:58:49 +0000 (UTC)
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Subject: svn commit: r227324 - head/sys/dev/ti
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Author: yongari
Date: Mon Nov  7 22:58:49 2011
New Revision: 227324
URL: http://svn.freebsd.org/changeset/base/227324

Log:
  Do not allow changing MTU to be less than the minimum.

Modified:
  head/sys/dev/ti/if_ti.c

Modified: head/sys/dev/ti/if_ti.c
==============================================================================
--- head/sys/dev/ti/if_ti.c	Mon Nov  7 22:53:06 2011	(r227323)
+++ head/sys/dev/ti/if_ti.c	Mon Nov  7 22:58:49 2011	(r227324)
@@ -3396,7 +3396,7 @@ ti_ioctl(struct ifnet *ifp, u_long comma
 	switch (command) {
 	case SIOCSIFMTU:
 		TI_LOCK(sc);
-		if (ifr->ifr_mtu > TI_JUMBO_MTU)
+		if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > TI_JUMBO_MTU)
 			error = EINVAL;
 		else {
 			ifp->if_mtu = ifr->ifr_mtu;