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Bug#904707: marked as done (fakeroot chown fails on kerberized NFSv4)

Your message dated Sat, 14 Sep 2024 10:05:13 +0200 (CEST)
with message-id <20240914080513.EF9FCBE2DE0@eldamar.lan>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #904707,
regarding fakeroot chown fails on kerberized NFSv4
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
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
904707: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=904707
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: lintian
Version: 2.5.94

Hi,

When the Lintian test suite runs on a kerberized NFSv4 volume,
't/tests/files-wrong-owner' fails with this error message:

tests::files-wrong-owner: chown: changing ownership of
'debian/files-wrong-owner/usr/lib/filenames/wrong-owner-100:0':
Invalid argument
tests::files-wrong-owner: make[1]: *** [debian/rules:13:
override_dh_fixperms] Error 1

The full log is attached.

I can replicate the behavior by cloning Lintian from salsa and running
'./debian/rules runtests onlyrun=files-wrong-owner'. I isolated the
error in the shell script below (also attached). In a strange twist,
the script produces no error for some low uids here, including 0 and
1, but fails consistently for uids that don't exist. (The uid 100
exists but fails.) Please try a different uid if you do not get the
error right away.

#!/bin/sh
set -x
tmpdir="$(mktemp -d --tmpdir=.)"
tmpfile="$(mktemp --tmpdir=$tmpdir)"
fakeroot -- chown 17171:0 $tmpfile   # offending command
rm $tmpfile
rmdir $tmpdir

I do not see a workaround in Lintian, so the bug should probably be
reassigned to 'nfs-utils'. The bugs over there did not strike me
immediately as related. (I have other bugs open and would be happy to
help.) Here are my mount and export details:

/etc/exports (on server):
/srv/nfs
*(rw,sync,no_subtree_check,no_root_squash,sec=krb5i:krb5p,fsid=0)
/srv/nfs/acct
*(rw,sync,no_subtree_check,no_root_squash,sec=krb5i:krb5p,mountpoint)

/etc/fstab (on client):
server:/acct /acct nfs4 rw,sec=krb5i,fsc 0 0

Perhaps it is relevant that 'root' on the client is allowed to use the
machine credentials:

/etc/idmapd (on server):
[Translation]
Method = nsswitch
GSS-Methods = static,nsswitch
[Static]
host/client.domain.tld@DOMAIN.TLD = root
[Mapping]
Nobody-User = nobody
Nobody-Group = nogroup


Also,

(client) Linux client.domain.tld 4.17.0-1-amd64 #1 SMP Debian 4.17.8-1
(2018-07-20) x86_64 GNU/Linux
(server) Linux server.domain.tld 4.16.0-2-amd64 #1 SMP Debian
4.16.16-2 (2018-06-22) x86_64 GNU/Linux

and finally,

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.17.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8),
LANGUAGE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages lintian depends on:
ii  binutils                       2.31.1-1
ii  bzip2                          1.0.6-8.1
ii  diffstat                       1.61-1+b1
ii  dpkg                           1.19.0.5+b1
ii  file                           1:5.33-3
ii  gettext                        0.19.8.1-6+b1
ii  intltool-debian                0.35.0+20060710.4
ii  libapt-pkg-perl                0.1.34
ii  libarchive-zip-perl            1.60-1
ii  libclass-accessor-perl         0.51-1
ii  libclone-perl                  0.39-1
ii  libdigest-sha-perl             6.02-1
ii  libdpkg-perl                   1.19.0.5
ii  libemail-valid-perl            1.202-1
ii  libfile-basedir-perl           0.08-1
ii  libipc-run-perl                20180523.0-1
ii  liblist-moreutils-perl         0.416-1+b3
ii  libparse-debianchangelog-perl  1.2.0-12
ii  libtext-levenshtein-perl       0.13-1
ii  libtimedate-perl               2.3000-2
ii  liburi-perl                    1.74-1
ii  libxml-simple-perl             2.25-1
ii  libyaml-libyaml-perl           0.72+repack-1
ii  man-db                         2.8.3-2
ii  patchutils                     0.3.4-2
ii  perl [libdigest-sha-perl]      5.26.2-6
ii  t1utils                        1.41-2
ii  xz-utils                       5.2.2-1.3

Versions of packages lintian recommends:
ii  libperlio-gzip-perl  0.19-1+b4

Versions of packages lintian suggests:
ii  binutils-multiarch     2.31.1-1
ii  dpkg-dev               1.19.0.5
ii  libhtml-parser-perl    3.72-3+b2
ii  libtext-template-perl  1.53-1

-- no debconf information

Thank you!

Attachment: lintian-nfs-fakeroot-error.log.gz
Description: application/gzip

Attachment: nfsv4-fakeroot-chown-test.sh.gz
Description: application/gzip


--- End Message ---
--- Begin Message --- 
Hi

[This reply and bug closer is sent for doing BTS maintenance for
src:nfs-utils bugs]

This bug was reported against a very old nfs-utils version without much
followups/triaging itself.

If you can reproduce it with the current version in unstable/testing or
stable at least, please reopen the bug,
https://www.debian.org/Bugs/server-control for details.

Regards,
Salvatore

--- End Message ---
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