[Samba] Samba 3.0.20 winbindd problem on x86-64

[Robin Hill]

We've been having some problems with winbind authentication recently
(on 3.0.13) so I've upgraded to 3.0.20 (including all the patches on
http://www.samba.org/samba/patches/).  This works perfectly on all our
32-bit systems but seems to break badly on the 64-bit systems.  Fetching
user and group lists (via 'wbinfo -u' and 'wbinfo -n') work fine, as
does looking up SIDs (via 'wbinfo -n').  Logging on using an ADS user
fails though (causing the winbindd server to lock up, which means all
user & group lookups then incur a huge delay) - I've narrowed this down
to the getgroups call (reproducible via 'wbinfo -r') but I can't follow
quite what this is doing in the code (It appears to call through to
schedule_async_request twice, hanging on the second call).

Any ideas?  Here's the smb.conf we're using:

[global]
        utmp = yes
        workgroup = BIOWISDOM
        server string = SAMBA
        time server = yes
        interfaces = 127.0.0.1 eth0
        bind interfaces only = true
        log file = /var/log/samba/log.%m
        security = ads 
        realm = INTERNAL.BIOWISDOM.COM
        password server = *
        socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
        local master = no
        dns proxy = yes
        encrypt passwords = yes
        client plaintext auth = no
        client lanman auth = no
        client ntlmv2 auth = yes
    
        idmap backend = ldap:ldap://ls-ukdevel01.internal.biowisdom.com
        idmap uid = 10000-20000
        idmap gid = 10000-20000

Many thanks,
	Robin
-- 
Robin Hill
Linux Systems Administrator, BioWisdom Ltd.
http://www.biowisdom.com/

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