[Pkg-samba-maint] Bug#1111107: samba: server reports 0 bytes available disk space to client

[Daniel Fussell]

Package: samba
Version: 2:4.22.3+dfsg-4~bpo12+1
Severity: important

Dear Maintainer,

After upgrading to Debian 12, the Samba server is reporting 0 bytes
available disk space to all users, but is correctly reporting disk
used space.  This prevents Windows Explorer clients from being able to
copy new files into the share.

This only seems to happen with Debian 12's Samba 4.17; it is
not happening with 4.13 (Debian 11), 4.20 or 4.22 (Debian 12 backports).

Share roots are user home directories on NFS exports from Linux NFS
servers.  Each user has a user quota on the underlying volume.

I don't have any local disk based shares to test with, so I can't
confirm that it only happens with NFS-mounted volumes.  I assume it is not
happening with local disk shares, or someone surely would have reported
it by now.

I would expect the normal Samba behavior of reporting the lesser of available
user quota space or the volume's available disk free space be reported to
the client.

-- Package-specific info:
* /etc/samba/smb.conf present, but not attached

-- System Information:
Debian Release: 12.11
  APT prefers oldstable-security
  APT policy: (500, 'oldstable-security'), (500, 'oldstable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-38-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.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 samba depends on:
ii  init-system-helpers   1.65.2
ii  libbsd0               0.11.7-2
ii  libc6                 2.36-9+deb12u10
ii  libcups2              2.4.2-3+deb12u8
ii  libdbus-1-3           1.14.10-1~deb12u1
ii  libgnutls30           3.7.9-2+deb12u5
ii  libldap-2.5-0         2.5.13+dfsg-5
ii  libldb2               2:2.11.0+samba4.22.3+dfsg-4~bpo12+1
ii  libpopt0              1.19+dfsg-1
ii  libtalloc2            2:2.4.3+samba4.22.3+dfsg-4~bpo12+1
ii  libtasn1-6            4.19.0-2+deb12u1
ii  libtdb1               2:1.4.13+samba4.22.3+dfsg-4~bpo12+1
ii  libtevent0            2:0.16.2+samba4.22.3+dfsg-4~bpo12+1
ii  libtirpc3             1.3.3+ds-1
ii  liburing2             2.3-3
ii  passwd                1:4.13+dfsg1-1+deb12u1
ii  procps                2:4.0.2-3
ii  samba-common          2:4.22.3+dfsg-4~bpo12+1
ii  samba-common-bin      2:4.22.3+dfsg-4~bpo12+1
ii  samba-libs [libndr6]  2:4.22.3+dfsg-4~bpo12+1

Versions of packages samba recommends:
ii  attr           1:2.5.1-4
ii  python3-samba  2:4.22.3+dfsg-4~bpo12+1
ii  samba-ad-dc    2:4.22.3+dfsg-4~bpo12+1

Versions of packages samba suggests:
pn  ctdb                 <none>
pn  samba-vfs-ceph       <none>
pn  samba-vfs-glusterfs  <none>
pn  ufw                  <none>
ii  winbind              2:4.22.3+dfsg-4~bpo12+1

-- debconf information:
  samba/run_mode: daemons
  samba-common/title: