[Pkg-samba-maint] Bug#907812: /sbin/mount.cifs: POSIX ACLs only work with vers=1.0 or noperm

[Christian Pernegger]

Package: cifs-utils
Version: 2:6.8-2
Severity: normal
File: /sbin/mount.cifs

Hello,

a while back there was a change in the default protocol version for cifs 
mounts. That broke one use case of mine, where I mount a share [on Samba 
from Debian stable] for a specific user, whose permissions server-side 
come from POSIX ACLs set there.

Before the change / with vers=1.0 set, this would just work, with the
correct owners, permissions etc. also shown client-side.
As soon as I mount with higher vers (incl. default), nounix 
automatically gets set on the mount, and everything shows as owned by 
root on the client, no permissions and an effectively ro share. The 
only way I can get higher protocol versions to work is to set noperm on 
the mount. That doesn't let me see ownership or permnissions on the 
client, but at least writing works.

Surely there must be a better way?

Cheers,
C.


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

Kernel: Linux 4.17.0-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=de_AT.UTF-8, LC_CTYPE=de_AT.UTF-8 (charmap=UTF-8), LANGUAGE=de_AT:de (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages cifs-utils depends on:
ii  libc6         2.27-5
ii  libcap-ng0    0.7.9-1
ii  libkeyutils1  1.5.9-9.3
ii  libkrb5-3     1.16-2
ii  libpam0g      1.1.8-3.8
ii  libtalloc2    2.1.14-1
ii  libwbclient0  2:4.8.5+dfsg-1

cifs-utils recommends no packages.

Versions of packages cifs-utils suggests:
pn  keyutils   <none>
ii  smbclient  2:4.8.5+dfsg-1
pn  winbind    <none>

-- no debconf information