[Pkg-samba-maint] Bug#816725: samba: Endlessly spawning new 'smbd <defunct>' processes

[Sergey Vlasov]

Package: samba
Version: 2:4.1.17+dfsg-2+deb8u1
Severity: normal
Tags: newcomer

Dear Maintainer,

After some time of having Windows guest running in QEMU I see many defunct smbd
processes accumulating in 'ps -e'.

Here is a part of /var/log/samba/log.smbd which repeats over and over again:

    smbd version 4.1.17-Debian started.
    Copyright Andrew Tridgell and the Samba Team 1992-2013
    [2016/03/04 11:56:26.950343,  0]
../lib/util/become_daemon.c:136(daemon_ready)
    STATUS=daemon 'smbd' finished starting up and ready to serve
connectionsUnable to connect to CUPS server localhost:631 - Bad file descriptor
    STATUS=daemon 'smbd' finished starting up and ready to serve
connectionsfailed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
    [2016/03/04 11:57:26.981020,  0]
../source3/printing/print_cups.c:151(cups_connect)
    Unable to connect to CUPS server localhost:631 - Bad file descriptor
    [2016/03/04 11:57:26.981103,  0]
../source3/printing/print_cups.c:528(cups_async_callback)
    failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
    [2016/03/04 12:10:27.520407,  0]
../source3/printing/print_cups.c:151(cups_connect)
    Unable to connect to CUPS server localhost:631 - Bad file descriptor
    [2016/03/04 12:10:27.520505,  0]
../source3/printing/print_cups.c:528(cups_async_callback)
    ...
    [2016/03/04 14:07:32.854780,  0]
../source3/printing/print_cups.c:151(cups_connect)
    Unable to connect to CUPS server localhost:631 - Bad file descriptor
    [2016/03/04 14:07:32.855617,  0]
../source3/printing/print_cups.c:528(cups_async_callback)
    failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
    [2016/03/04 14:10:49.430605,  0] ../lib/util/pidfile.c:153(pidfile_unlink)
    Failed to delete pidfile /var/run/samba/smbd.pid. Error was No such file or
directory
    [2016/03/04 14:12:38,  0] ../source3/smbd/server.c:1189(main)
    smbd version 4.1.17-Debian started.
    Copyright Andrew Tridgell and the Samba Team 1992-2013

I have been using an unmodified smb.conf, then I tried to add the following to
the [global] section of smb.conf:

    load printers = no
    printing = bsd
    printcap name = /dev/null
    disable spoolss = yes

but I still continue to get more and more defunct smbd processes.

Regards,
Sergey

-- System Information:
Debian Release: 8.3
  APT prefers stable
  APT policy: (990, 'stable'), (500, 'stable-updates'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages samba depends on:
ii  adduser                              3.113+nmu3
ii  dpkg                                 1.17.26
ii  libasn1-8-heimdal                    1.6~rc2+dfsg-9
ii  libbsd0                              0.7.0-2
ii  libc6                                2.19-18+deb8u3
ii  libcomerr2                           1.42.12-1.1
ii  libhdb9-heimdal [heimdal-hdb-api-8]  1.6~rc2+dfsg-9
ii  libkdc2-heimdal                      1.6~rc2+dfsg-9
ii  libkrb5-26-heimdal