Your message dated Wed, 05 Aug 2026 17:31:09 +0000
with message-id <[email protected]>
and subject line Bug#1143544: Removed package(s) from unstable
has caused the Debian Bug report #1085229,
regarding isc-dhcp-client: Debian Linux dhclient-script PREINIT6 doesn't wait
for DAD on link-local address
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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misconfiguration somewhere. Please contact [email protected]
immediately.)
--
1085229: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1085229
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: isc-dhcp-client
Version: 4.4.3-P1-5
Severity: important
Tags: ipv6
X-Debbugs-Cc: [email protected]
Dear Maintainer,
>From dhclient-script(8) describint the PREINIT action:
The DHCP client is requesting that an interface be configured as
required in order to send packets prior to receiving an actual ad-
dress. [..]
To that end the script will bring up the interface if it is not
already up. However for DHCPv6, the client needs a working (non
tentative) link-local address before it can operate. After bringing
up the interface there might be several seconds while the kernel runs
Duplicate Address Detection (DAD) before the link-local address is
ready to use. The PREINIT6 action in dhclient-script should wait for
that to complete before returning.
The upstream example dhclient-script waits in this way[0], as does the
one in Fedora, based on it. The Debian one, however, does not [1].
This means that if you attempt to "dhclient -6" on a down interface
without first bringing it up and waiting for the link-local address,
it will fail.
This can be reproduced quite easily using the pasta too (passt
package) which will create a network namespace and includes a DHCPv6
server:
$ pasta -I exampleif -- sh -c "dhclient -v -6 exampleif"
Multiple default IPv6 routes, picked first
Internet Systems Consortium DHCP Client 4.4.3-P1
Copyright 2004-2022 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
can't create /var/lib/dhcp/dhclient6.leases: Permission denied
Can't bind to dhcp address: Cannot assign requested address
Please make sure there is no other dhcp server
running and that there's no entry for dhcp or
bootp in /etc/inetd.conf. Also make sure you
are not running HP JetAdmin software, which
includes a bootp server.
If you think you have received this message due to a bug rather
than a configuration issue please read the section on submitting
bugs on either our web page at www.isc.org or in the README file
before submitting a bug. These pages explain the proper
process and the information we find helpful for debugging.
exiting.
If, instead, time is left for DAD to complete, dhclient will succeed:
$ pasta -I exampleif -- sh -c "ip link set exampleif up; sleep 2; dhclient -v
-6 exampleif"
Multiple default IPv6 routes, picked first
Internet Systems Consortium DHCP Client 4.4.3-P1
Copyright 2004-2022 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
can't create /var/lib/dhcp/dhclient6.leases: Permission denied
Listening on Socket/exampleif
Sending on Socket/exampleif
Created duid "\000\001\000\001.\243\033v2\351C\327C\333".
can't create /var/lib/dhcp/dhclient6.leases: Permission denied
PRC: Soliciting for leases (INIT).
XMT: Forming Solicit, 0 ms elapsed.
XMT: X-- IA_NA 43:d7:43:db
XMT: | X-- Request renew in +3600
XMT: | X-- Request rebind in +5400
XMT: Solicit on exampleif, interval 1020ms.
RCV: Advertise message on exampleif from fe80::7eff:4dff:fedf:6a54.
RCV: X-- IA_NA 43:d7:43:db
RCV: | X-- starts 1729126134
RCV: | X-- t1 - renew +4294967295
RCV: | X-- t2 - rebind +4294967295
RCV: | X-- [Options]
RCV: | | X-- IAADDR 2001:4479:e300:7200:222:4dff:fea6:88f3
RCV: | | | X-- Preferred lifetime 4294967295.
RCV: | | | X-- Max lifetime 4294967295.
RCV: X-- Server ID: 00:01:00:01:2e:a3:1b:74:9a:55:9a:55:9a:55
RCV: Advertisement recorded.
PRC: Selecting best advertised lease.
PRC: Considering best lease.
PRC: X-- Initial candidate 00:01:00:01:2e:a3:1b:74:9a:55:9a:55:9a:55 (s:
10103, p: 0).
XMT: Forming Request, 0 ms elapsed.
XMT: X-- IA_NA 43:d7:43:db
XMT: | X-- Requested renew +3600
XMT: | X-- Requested rebind +5400
XMT: | | X-- IAADDR 2001:4479:e300:7200:222:4dff:fea6:88f3
XMT: | | | X-- Preferred lifetime +7200
XMT: | | | X-- Max lifetime +7500
XMT: V IA_NA appended.
XMT: Request on exampleif, interval 940ms.
RCV: Reply message on exampleif from fe80::7eff:4dff:fedf:6a54.
RCV: X-- IA_NA 43:d7:43:db
RCV: | X-- starts 1729126135
RCV: | X-- t1 - renew +4294967295
RCV: | X-- t2 - rebind +4294967295
RCV: | X-- [Options]
RCV: | | X-- IAADDR 2001:4479:e300:7200:222:4dff:fea6:88f3
RCV: | | | X-- Preferred lifetime 4294967295.
RCV: | | | X-- Max lifetime 4294967295.
RCV: X-- Server ID: 00:01:00:01:2e:a3:1b:74:9a:55:9a:55:9a:55
PRC: Bound to lease 00:01:00:01:2e:a3:1b:74:9a:55:9a:55:9a:55.
can't create /var/lib/dhcp/dhclient6.leases: Permission denied
[0]
https://github.com/isc-projects/dhcp/blob/572032cb0e514606559de3784e3f7ca8e1539d17/client/scripts/linux#L432
[1]
https://salsa.debian.org/debian/isc-dhcp/-/blob/master/debian/dhclient-script.linux?ref_type=heads#L389
-- System Information:
Debian Release: trixie/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.11.2-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages isc-dhcp-client depends on:
ii debianutils 5.20
ii iproute2 6.11.0-1
ii libc6 2.40-3
Versions of packages isc-dhcp-client recommends:
ii isc-dhcp-common 4.4.3-P1-5
Versions of packages isc-dhcp-client suggests:
pn avahi-autoipd <none>
pn isc-dhcp-client-ddns <none>
pn resolvconf <none>
-- no debconf information
--- End Message ---
--- Begin Message ---
Version: 4.4.3-P1-8+rm
Dear submitter,
as the package isc-dhcp has just been removed from the Debian archive
unstable we hereby close the associated bug reports. We are sorry
that we couldn't deal with your issue properly.
For details on the removal, please see https://bugs.debian.org/1143544
The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.
Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.
This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
[email protected].
Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)
--- End Message ---
