Date: Tue, 25 Jun 2013 15:13:56 +0300 (EEST) From: Sayetsky Anton <vsjcfm@gmail.com> To: FreeBSD-gnats-submit@freebsd.org Subject: bin/179963: ntpd(8) tries to bind IFDISABLED IPv6 addresses Message-ID: <201306251213.r5PCDu9L076491@jw.lds.net.ua> Resent-Message-ID: <201306251220.r5PCK2t5057313@freefall.freebsd.org>
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>Number: 179963
>Category: bin
>Synopsis: ntpd(8) tries to bind IFDISABLED IPv6 addresses
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jun 25 12:20:02 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Sayetsky Anton
>Release: FreeBSD 9.1-RELEASE-p3 amd64
>Organization:
>Environment:
System: FreeBSD pxe.local 9.1-RELEASE-p2 FreeBSD 9.1-RELEASE-p2 #0: Sun Apr 28 16:07:37 EEST 2013 root@pxe.local:/usr/obj/usr/src/sys/PXESRV amd64
>Description:
ntpd tries to bind IPv6 addresses even if the none of them configured. You can see the following errors (but sometimes ntpd starts without errors):
Jun 25 14:43:43 pxe kernel: Jun 25 14:43:43 pxe ntpd[701]: bind() fd 27, family AF_INET6, port 123, scope 1, addr fe80::250:56ff:febf:12, mcast=0 flags=0x11 fails: Can't assign requested address
Jun 25 14:43:43 pxe kernel: Jun 25 14:43:43 pxe ntpd[701]: unable to create socket on em0 (7) for fe80::250:56ff:febf:12#123
But it still binds to IFDISABLED auto-address:
root@pxe:~# sockstat | grep ntpd
root ntpd 701 3 dgram -> /var/run/logpriv
root ntpd 701 20 udp4 *:123 *:*
root ntpd 701 21 udp6 *:123 *:*
root ntpd 701 22 udp4 10.0.0.16:123 *:*
root ntpd 701 23 udp6 ::1:123 *:*
root ntpd 701 24 udp6 fe80:3::1:123 *:*
root ntpd 701 25 udp4 127.0.0.1:123 *:*
root ntpd 701 27 udp6 fe80:1::250:56ff:febf:12:123 *:*
root@pxe:~#
Configs below:
root@pxe:~# ifconfig
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
ether 00:50:56:bf:00:12
inet 10.0.0.16 netmask 0xffffffe0 broadcast 10.0.0.31
inet6 fe80::250:56ff:febf:12%em0 prefixlen 64 scopeid 0x1
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet autoselect (1000baseT <full-duplex>)
status: active
ipfw0: flags=8801<UP,SIMPLEX,MULTICAST> metric 0 mtu 65536
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
inet 127.0.0.1 netmask 0xff000000
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
root@pxe:~# cat /etc/ntp.conf
#
# $FreeBSD: releng/9.1/etc/ntp.conf 239608 2012-08-23 04:57:56Z delphij $
#
# Default NTP servers for the FreeBSD operating system.
#
# Don't forget to enable ntpd in /etc/rc.conf with:
# ntpd_enable="YES"
#
# The driftfile is by default /var/db/ntpd.drift, check
# /etc/defaults/rc.conf on how to change the location.
#
server ntp.lds.net.ua iburst maxpoll 9
restrict ntp.lds.net.ua nomodify nopeer noquery notrap
server ntp1.lds.net.ua iburst maxpoll 9
restrict ntp1.lds.net.ua nomodify nopeer noquery notrap
server ntp2.lds.net.ua iburst maxpoll 9
restrict ntp2.lds.net.ua nomodify nopeer noquery notrap
restrict 127.0.0.1
restrict -6 ::1
restrict default ignore
server 127.127.1.0
restrict 127.127.1.0
fudge 127.127.1.0 stratum 10
restrict netmon.lds.local nomodify nopeer notrap
restrict netmon.lds.net.ua nomodify nopeer notrap
root@pxe:~# egrep "^ifconfig|^ntpd" /etc/rc.conf
ifconfig_em0="inet 10.0.0.16 netmask 255.255.255.224"
ntpd_enable="YES"
ntpd_config="/etc/ntp.conf"
ntpd_flags="-p /var/run/ntpd.pid -f /var/db/ntpd.drift"
ntpd_sync_on_start="YES"
root@pxe:~#
>How-To-Repeat:
Just enable ntpd on a machine without configured IPv6 addresses.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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