Bug#595269: libc6: upgrade to 2.11.2-4 breaks dns localhost lookups
Package: libc6
Version: 2.11.2-4
Severity: normal
Given: my daily Debian/unstable Q/A build, dnsmasq running on host,
Debian/unstable chroot trying to download stuff -> resolving DNS
Problem: when upgrading to 2.11.2-4 the chroot can't resolve any
dns entries through dnsmasq any longer without an resolve.conf entry
to resolv.conf
Workaround: adding "nameserver 127.0.0.1" to resolv.conf
or downgrading to libc <=2.11.2-2
Note: a similar problem existed in the past already: #551879 -
though - at least AFAICS - doesn't seem to be the same issue as I've
an /etc/hosts file in my chroot.
Full Details:
# cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# ping -c 1 debian.org
ping: unknown host debian.org
# echo "nameserver 127.0.0.1" >> /etc/resolvconf/run/resolv.conf
# ping -c 1 debian.org
PING debian.org (194.109.137.218) 56(84) bytes of data.
64 bytes from klecker.debian.org (194.109.137.218): icmp_req=1 ttl=56 time=13.9 ms
--- debian.org ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 13.952/13.952/13.952/0.000 ms
Downgrading to libc 2.11.2-2:
# apt-get install libc6=2.11.2-2 libc-bin=2.11.2-2
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
glibc-doc
The following packages will be DOWNGRADED:
libc-bin libc6
0 upgraded, 0 newly installed, 2 downgraded, 0 to remove and 2 not upgraded.
Need to get 5,004kB of archives.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://snapshot.debian.org/archive/debian/20100829/ sid/main libc-bin amd64 2.11.2-2 [744kB]
Get:2 http://snapshot.debian.org/archive/debian/20100829/ sid/main libc6 amd64 2.11.2-2 [4,259kB]
Fetched 5,004kB in 7s (671kB/s)
Preconfiguring packages ...
Can not write log, openpty() failed (/dev/pts not mounted?)
dpkg: warning: downgrading libc-bin from 2.11.2-4 to 2.11.2-2.
(Reading database ... 36473 files and directories currently installed.)
Preparing to replace libc-bin 2.11.2-4 (using .../libc-bin_2.11.2-2_amd64.deb) ...
Unpacking replacement libc-bin ...
Processing triggers for man-db ...
Can not write log, openpty() failed (/dev/pts not mounted?)
Setting up libc-bin (2.11.2-2) ...
[...]
Works again with 2.11.2-2:
# cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1
# ping -c 1 debian.org
PING debian.org (128.31.0.51) 56(84) bytes of data.
64 bytes from senfl.debian.org (128.31.0.51): icmp_req=1 ttl=48 time=100 ms
--- debian.org ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 100.675/100.675/100.675/0.000 ms
# sed -i "/nameserver 127.0.0.1/d" /etc/resolvconf/run/resolv.conf
# cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# ping -c 1 debian.org
PING debian.org (194.109.137.218) 56(84) bytes of data.
64 bytes from klecker.debian.org (194.109.137.218): icmp_req=1 ttl=56 time=13.7 ms
--- debian.org ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 13.747/13.747/13.747/0.000 ms
If you need any further information, testing,... please let me know.
Leaving severity of this bugreport up to the maintainers, though if
the release is supposed to enter squeeze I think this bug could
qualify for RC.
regards,
-mika-
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