[Pkg-samba-maint] Bug#753798: samba: Winbind fails to retrieve getent passwd information on slow line to PDC

[Pavel V Samsonov]

Package: samba
Version: 2:3.6.6-6+deb7u4
Severity: normal

Dear Maintainer,
I have Debian linux server with samba as Windows domain member with security =
domain.
Line to PDC is vpn tunnel with 4Mbps.
nsswitch.conf:
....
passwd:         files winbind
group:          files winbind
shadow:         files
....

I run test command:

wbinfo -t
checking the trust secret for domain ENTERPRISE via RPC calls succeeded

wbinfo -g
ENTERPRISE\пользователи домена
.....
ENTERPRISE\администраторы схемы
48 lines (timeout ~ 2 seconds)

wbinfo -u
ENTERPRISE\метизы
.......
ENTERPRISE\романов
910 lines (timeout ~ 5 seconds)

getent group
<print of groups domain ENETERPRISE OK>
(timeout 1-5 seconds)

getent passwd
<local users>
timeout 20 seconds and print nothing about ENETERPRISE

strace getent passwd
....
connect(5, {sa_family=AF_FILE, path="/var/run/samba/winbindd_privileged/pipe"},
110) = 0
close(4)                                = 0
poll([{fd=5, events=POLLIN|POLLHUP}], 1, 0) = 0 (Timeout)
write(5, "0\10\0\0\7\0\0\0\0\0\0\0U\17\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
2096) = 2096
poll([{fd=5, events=POLLIN|POLLHUP}], 1, 5000) = 1 ([{fd=5, revents=POLLIN}])
read(5,
"\250\r\0\0\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 3496)
= 3496
poll([{fd=5, events=POLLIN|POLLHUP}], 1, 0) = 0 (Timeout)
write(5, "0\10\0\0\t\0\0\0\0\0\0\0U\17\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
2096) = 2096
poll([{fd=5, events=POLLIN|POLLHUP}], 1, 5000) = 1 ([{fd=5, revents=POLLIN}])
read(5,
"\250\r\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 3496)
= 3496
close(3)                                = 0
munmap(0xb7791000, 4096)                = 0
poll([{fd=5, events=POLLIN|POLLHUP}], 1, 0) = 0 (Timeout)
write(5,
"0\10\0\0\10\0\0\0\0\0\0\0U\17\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 2096) =
2096
poll([{fd=5, events=POLLIN|POLLHUP}], 1, 5000) = 1 ([{fd=5, revents=POLLIN}])
read(5,
"\250\r\0\0\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 3496)
= 3496
close(5)                                = 0
exit_group(0)                           = ?

....

I think that on slow line winbind need large timeouts for work, but I cannot
find smb.conf options.

Thanks.



-- System Information:
Debian Release: 7.5
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.2.57tinyware (SMP w/2 CPU cores)
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages samba depends on:
ii  adduser                3.113+nmu3
ii  debconf [debconf-2.0]  1.5.49
ii  dpkg                   1.16.14
ii  libacl1                2.2.51-8
ii  libattr1               1:2.4.46-8
ii  libc6                  2.13-38+deb7u1
ii  libcap2                1:2.22-1.2
ii  libcomerr2             1.42.5-1.1
ii  libcups2               1.5.3-5+deb7u1
ii  libgssapi-krb5-2       1.10.1+dfsg-5+deb7u1
ii  libk5crypto3           1.10.1+dfsg-5+deb7u1
ii  libkrb5-3              1.10.1+dfsg-5+deb7u1
ii  libldap-2.4-2          2.4.31-1+nmu2
ii  libpam-modules         1.1.3-7.1
ii  libpam-runtime         1.1.3-7.1
ii  libpam0g               1.1.3-7.1
ii  libpopt0               1.16-7
ii  libtalloc2             2.0.7+git20120207-1
ii  libtdb1                1.2.10-2
ii  libwbclient0           2:3.6.6-6+deb7u4
ii  lsb-base               4.1+Debian8+deb7u1
ii  procps                 1:3.3.3-3
ii  samba-common           2:3.6.6-6+deb7u4
ii  update-inetd           4.43
ii  zlib1g                 1:1.2.7.dfsg-13

Versions of packages samba recommends:
ii  logrotate  3.8.1-4
ii  tdb-tools  1.2.10-2

Versions of packages samba suggests:
pn  ctdb                              <none>
pn  ldb-tools                         <none>
pn  openbsd-inetd | inet-superserver  <none>
pn  smbldap-tools                     <none>

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