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Michael A Weber

2016-Jul-30 22:13 UTC

[Samba] Samba 4.4.5 segmentation fault on Darwin

First:  Long-time samba user (since 2004), and my first reach-out to everyone,
so thank you for the great work!

New issue:  Both joining an AD domain and smbd fail with a segmentation fault on
the Mac.  I’ve tried to debug it the best I can but I’m not a C developer and
can’t figure out what is the cause.

For smbd, I have the log errors and the stack trace from it which I hope will
provide some clues.  For net ads join, I have it on full debug (-d 10), but the
only thing I get is the segmentation fault at the end.  If there is a log file
which may have more of a clue, I don’t know where to find it, but I’ll be happy
to get any information out of it that I can.

I know…  I hear the groans already.  “Mac OS X????”  Yep…  I know.  Sadly, I
need to configure a Mac OS X machine as a member server to an AD domain.  I
know…  YUCK.  However, it’s something I must do.

I’m going to attempt to provide information that may help to identify the
problem, but if there is anything else needed, I’ll do what I can to get it. 
Please just let me know.

Gratefully,

Mike



Here is the info from smbd log:


*****************************************************************************************************************************************************

[2016/07/29 16:09:59.994149,  0] ../source3/lib/util.c:1399(set_maxfiles)
  set_maxfiles: setrlimit for RLIMIT_NOFILE for 16424 files failed with error
Invalid argument
[2016/07/29 16:10:00.009840,  0] ../lib/util/become_daemon.c:124(daemon_ready)
  STATUS=daemon 'smbd' finished starting up and ready to serve
connections
[2016/07/29 16:10:00.154074,  0] ../lib/util/fault.c:78(fault_report)
  ==============================================================[2016/07/29
16:10:00.155925,  0] ../lib/util/fault.c:79(fault_report)
  INTERNAL ERROR: Signal 11 in pid 1698 (4.4.5)
  Please read the Trouble-Shooting section of the Samba HOWTO
[2016/07/29 16:10:00.157317,  0] ../lib/util/fault.c:81(fault_report)
  ==============================================================[2016/07/29
16:10:00.159240,  0] ../source3/lib/util.c:791(smb_panic_s3)
  PANIC (pid 1698): internal error
[2016/07/29 16:10:00.161906,  0] ../source3/lib/util.c:902(log_stack_trace)
  BACKTRACE: 21 stack frames:
   #0 0   libsmbconf.dylib                    0x0000000102107e0a log_stack_trace
+ 42
   #1 1   libsmbconf.dylib                    0x0000000102107be8 smb_panic_s3 +
152
   #2 2   libsamba-util.dylib                 0x000000010155a687 smb_panic + 39
   #3 3   libsamba-util.dylib                 0x000000010155ac50 string_sub_once
+ 0
   #4 4   libsamba-util.dylib                 0x000000010155a653 sig_fault + 19
   #5 5   libsystem_platform.dylib            0x00007fff913a752a _sigtramp + 26
   #6 6   ???                                 0x0000000083442f30 0x0 +
2202283824
   #7 7   libsystem_c.dylib                   0x00007fff82d45f13 __memcpy_chk +
22
   #8 8   libgssapi-samba4.dylib              0x0000000101ab5d06 _gss_copy_oid +
150
   #9 9   libgssapi-samba4.dylib              0x0000000101ab89e3 gss_import_name
+ 259
   #10 10  libads-samba4.dylib                 0x0000000102b58677
ads_generate_service_principal + 359
   #11 11  libads-samba4.dylib                 0x0000000102b57bde
ads_sasl_spnego_bind + 974
   #12 12  libads-samba4.dylib                 0x0000000102b5761a ads_sasl_bind
+ 650
   #13 13  libads-samba4.dylib                 0x0000000102b4a2f9 ads_connect +
3097
   #14 14  libsmbd-base-samba4.dylib           0x000000010160f8ea
check_published_printers + 442
   #15 15  libsmbd-base-samba4.dylib           0x000000010160375b
nt_printing_init + 107
   #16 16  libsmbd-base-samba4.dylib           0x00000001015f81ac
print_backend_init + 636
   #17 17  libsmbd-base-samba4.dylib           0x0000000101611282
printing_subsystem_init + 50
   #18 18  smbd                                0x000000010152e652 main + 7570
   #19 19  libdyld.dylib                       0x00007fff84fed5ad start + 1
   #20 20  ???                                 0x0000000000000001 0x0 + 1
[2016/07/29 16:10:00.173382,  0] ../source3/lib/dumpcore.c:303(dump_core)
  dumping core in /usr/local/samba/var/cores/smbd

*****************************************************************************************************************************************************

(It says at the end that it’s core dumping to that location, but there is
nothing in there.)




Here is the trailing end of the net -d 10 ads join command and failure:

*****************************************************************************************************************************************************

create_local_private_krb5_conf_for_domain: wrote file
/usr/local/samba/var/lock/smb_krb5/krb5.conf.WEBERAUTOMOTIVE with realm
INT.WEBERAUTOMOTIVE.COM KDC list = 		kdc = 192.168.75.76

sitename_fetch: Returning sitename for INT.WEBERAUTOMOTIVE.COM:
"Default-First-Site-Name"
internal_resolve_name: looking up addc.int.weberautomotive.com#20 (sitename
Default-First-Site-Name)
name addc.int.weberautomotive.com#20 found.
remove_duplicate_addrs2: looking for duplicate address/port pairs
ads_try_connect: sending CLDAP request to 192.168.75.76 (realm:
int.weberautomotive.com)
     &response->data.nt5_ex: struct NETLOGON_SAM_LOGON_RESPONSE_EX
        command                  : LOGON_SAM_LOGON_RESPONSE_EX (23)
        sbz                      : 0x0000 (0)
        server_type              : 0x000013fd (5117)
               1: NBT_SERVER_PDC           
               1: NBT_SERVER_GC            
               1: NBT_SERVER_LDAP          
               1: NBT_SERVER_DS            
               1: NBT_SERVER_KDC           
               1: NBT_SERVER_TIMESERV      
               1: NBT_SERVER_CLOSEST       
               1: NBT_SERVER_WRITABLE      
               1: NBT_SERVER_GOOD_TIMESERV 
               0: NBT_SERVER_NDNC          
               0: NBT_SERVER_SELECT_SECRET_DOMAIN_6
               1: NBT_SERVER_FULL_SECRET_DOMAIN_6
               0: NBT_SERVER_ADS_WEB_SERVICE
               0: NBT_SERVER_DS_8          
               0: NBT_SERVER_HAS_DNS_NAME  
               0: NBT_SERVER_IS_DEFAULT_NC 
               0: NBT_SERVER_FOREST_ROOT   
        domain_uuid              : 8f9e1b80-b8a8-47fd-898b-b9e68b3bc463
        forest                   : 'int.weberautomotive.com'
        dns_domain               : 'int.weberautomotive.com'
        pdc_dns_name             : 'addc.int.weberautomotive.com'
        domain_name              : 'WEBERAUTOMOTIVE'
        pdc_name                 : 'ADDC'
        user_name                : ''
        server_site              : 'Default-First-Site-Name'
        client_site              : 'Default-First-Site-Name'
        sockaddr_size            : 0x00 (0)
        sockaddr: struct nbt_sockaddr
            sockaddr_family          : 0x00000000 (0)
            pdc_ip                   : (null)
            remaining                : DATA_BLOB length=0
        next_closest_site        : NULL
        nt_version               : 0x00000005 (5)
               1: NETLOGON_NT_VERSION_1    
               0: NETLOGON_NT_VERSION_5    
               1: NETLOGON_NT_VERSION_5EX  
               0: NETLOGON_NT_VERSION_5EX_WITH_IP
               0: NETLOGON_NT_VERSION_WITH_CLOSEST_SITE
               0: NETLOGON_NT_VERSION_AVOID_NT4EMUL
               0: NETLOGON_NT_VERSION_PDC  
               0: NETLOGON_NT_VERSION_IP   
               0: NETLOGON_NT_VERSION_LOCAL
               0: NETLOGON_NT_VERSION_GC   
        lmnt_token               : 0xffff (65535)
        lm20_token               : 0xffff (65535)
sitename_store: realm = [WEBERAUTOMOTIVE], sitename = [Default-First-Site-Name],
expire = [2085923199]
Did not store value for AD_SITENAME/DOMAIN/WEBERAUTOMOTIVE, we already got it
sitename_store: realm = [int.weberautomotive.com], sitename =
[Default-First-Site-Name], expire = [2085923199]
Did not store value for AD_SITENAME/DOMAIN/INT.WEBERAUTOMOTIVE.COM, we already
got it
Successfully contacted LDAP server 192.168.75.76
Opening connection to LDAP server '192.168.75.76:389', timeout 15
seconds
Initialized connection for LDAP server 'ldap://192.168.75.76:389'
Connected to LDAP server addc.int.weberautomotive.com
ads_closest_dc: NBT_SERVER_CLOSEST flag set
saf_store: domain = [WEBERAUTOMOTIVE], server = [addc.int.weberautomotive.com],
expire = [1469828016]
Adding cache entry with key=[SAF/DOMAIN/WEBERAUTOMOTIVE] and timeout=[Fri Jul 29
16:33:36 2016 CDT] (900 seconds ahead)
saf_store: domain = [int.weberautomotive.com], server =
[addc.int.weberautomotive.com], expire = [1469828016]
Adding cache entry with key=[SAF/DOMAIN/INT.WEBERAUTOMOTIVE.COM] and
timeout=[Fri Jul 29 16:33:36 2016 CDT] (900 seconds ahead)
KDC time offset is -187 seconds
Found SASL mechanism GSS-SPNEGO
ads_sasl_spnego_bind: got OID=1.2.840.48018.1.2.2
ads_sasl_spnego_bind: got OID=1.2.840.113554.1.2.2
ads_sasl_spnego_bind: got OID=1.3.6.1.4.1.311.2.2.10
Segmentation fault: 11

*****************************************************************************************************************************************************



Build information for samba 4.4.5:

*****************************************************************************************************************************************************

Build environment:
   Built by:    mweber at macmini.int.weberautomotive.com
   Built on:    Thu Jul 28 22:30:57 CDT 2016
   Built using: /usr/bin/gcc
   Build host:  Darwin macmini.int.weberautomotive.com 15.6.0 Darwin Kernel
Version 15.6.0: Thu Jun 23 18:25:34 PDT 2016;
root:xnu-3248.60.10~1/RELEASE_X86_64 x86_64
   SRCDIR:      /Users/mweber/Downloads/install/samba-4.4.5/source3
   BUILDDIR:    /Users/mweber/Downloads/install/samba-4.4.5/source3

Paths:
   SBINDIR: /usr/local/samba/sbin
   BINDIR: /usr/local/samba/bin
   CONFIGFILE: /usr/local/samba/etc/smb.conf
   LOGFILEBASE: /usr/local/samba/var
   LMHOSTSFILE: /usr/local/samba/etc/lmhosts
   LIBDIR: /usr/local/samba/lib
   MODULESDIR: /usr/local/samba/lib
   SHLIBEXT: dylib
   LOCKDIR: /usr/local/samba/var/lock
   STATEDIR: /usr/local/samba/var/locks
   CACHEDIR: /usr/local/samba/var/cache
   PIDDIR: /usr/local/samba/var/run
   SMB_PASSWD_FILE: /usr/local/samba/private/smbpasswd
   PRIVATE_DIR: /usr/local/samba/private


--with Options:
   WITH_ADS
   WITH_AUTOMOUNT
   WITH_DNS_UPDATES
   WITH_PAM
   WITH_PAM_MODULES
   WITH_PTHREADPOOL
   WITH_QUOTAS
   WITH_SENDFILE
   WITH_SYSLOG
   WITH_WINBIND

Builtin modules:
   vfs_default auth_domain auth_builtin auth_sam auth_winbind pdb_smbpasswd
pdb_tdbsam pdb_wbc_sam auth_unix auth_wbc nss_info_template idmap_tdb
idmap_passdb idmap_nss pdb_ldapsam idmap_ldap charset_macosxfs

*****************************************************************************************************************************************************

Kevin Davidson

2016-Jul-31 00:22 UTC

head link

[Samba] Samba 4.4.5 segmentation fault on Darwin

> On 30 Jul 2016, at 23:13, Michael A Weber <mweber.subscriptions01 at
gmail.com> wrote:
> 
> 
> I know…  I hear the groans already.  “Mac OS X????”  Yep…  I know.  Sadly,
I need to configure a Mac OS X machine as a member server to an AD domain.  I
know…  YUCK.  However, it’s something I must do.
Is there a reason for attempting to do this with Samba, rather than the built in
support for SMB 2.0 and Active Directory?

Either add an Active Directory Network Account Server in the Users & Groups
System Preference, using the domain controller and an admin account, or use
dsconfigad to do it from the command line. Set the search paths appropriately
for authentication and contacts if you also need access to an Open Directory
domain.

Then turn on file sharing in the Server app and set up your shares, ACLs etc.

If there's a specific requirement for Samba it might be helpful to know what
that is.
> [2016/07/29 16:10:00.173382,  0] ../source3/lib/dumpcore.c:303(dump_core)
>  dumping core in /usr/local/samba/var/cores/smbd
> 
>
*****************************************************************************************************************************************************
> 
> (It says at the end that it’s core dumping to that location, but there is
nothing in there.)
Try ulimit -c unlimited before you test. Core dump size is limited to 0 by
default.


Sent from my iPad

-- 
Kevin Davidson
Apple Certified System Administrator
Technical Director

t 01506 668674
m 07813 149620
w www.indigospring.co.uk

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Andrew Bartlett

2016-Jul-31 09:10 UTC

head link

[Samba] Samba 4.4.5 segmentation fault on Darwin

On Sat, 2016-07-30 at 17:13 -0500, Michael A Weber
wrote:> First:  Long-time samba user (since 2004), and my first reach-out to
> everyone, so thank you for the great work!
> 
> New issue:  Both joining an AD domain and smbd fail with a
> segmentation fault on the Mac.  I’ve tried to debug it the best I can
> but I’m not a C developer and can’t figure out what is the cause.
> 
> For smbd, I have the log errors and the stack trace from it which I
> hope will provide some clues.  For net ads join, I have it on full
> debug (-d 10), but the only thing I get is the segmentation fault at
> the end.  If there is a log file which may have more of a clue, I
> don’t know where to find it, but I’ll be happy to get any information
> out of it that I can.
> 
> I know…  I hear the groans already.  “Mac OS X????”  Yep…  I
> know.  Sadly, I need to configure a Mac OS X machine as a member
> server to an AD domain.  I know…  YUCK.  However, it’s something I
> must do.
:-)

I'm glad to hear it is compiling these days.  For the longest time
there were bugs complaining that we didn't even compile.
> I’m going to attempt to provide information that may help to identify
> the problem, but if there is anything else needed, I’ll do what I can
> to get it.  Please just let me know.
If you are not printing, try setting:

disable spoolss = yes.

That might work around it.  To get us the info we need getting a gdb
backtrace from the crashing process or the resulting core would be very
helpful.

Thanks,

Andrew Bartlett

-- 
Andrew Bartlett                       http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba

Michael A Weber

2016-Jul-31 22:31 UTC

head link

[Samba] Samba 4.4.5 segmentation fault on Darwin

> On Jul 31, 2016, at 4:10 AM, Andrew Bartlett <abartlet at samba.org>
wrote:
> 
> On Sat, 2016-07-30 at 17:13 -0500, Michael A Weber wrote:
>> First:  Long-time samba user (since 2004), and my first reach-out to
>> everyone, so thank you for the great work!
>> 
>> New issue:  Both joining an AD domain and smbd fail with a
>> segmentation fault on the Mac.  I’ve tried to debug it the best I can
>> but I’m not a C developer and can’t figure out what is the cause.
>> 
>> For smbd, I have the log errors and the stack trace from it which I
>> hope will provide some clues.  For net ads join, I have it on full
>> debug (-d 10), but the only thing I get is the segmentation fault at
>> the end.  If there is a log file which may have more of a clue, I
>> don’t know where to find it, but I’ll be happy to get any information
>> out of it that I can.
>> 
>> I know…  I hear the groans already.  “Mac OS X????”  Yep…  I
>> know.  Sadly, I need to configure a Mac OS X machine as a member
>> server to an AD domain.  I know…  YUCK.  However, it’s something I
>> must do.
> 
> :-)
> 
> I'm glad to hear it is compiling these days.  For the longest time
> there were bugs complaining that we didn't even compile.
Well, maybe I should have stated or clarified that I made small modifications to
the code to remedy the bugs per suggested patches I found.  Oops?? 
:D> 
>> I’m going to attempt to provide information that may help to identify
>> the problem, but if there is anything else needed, I’ll do what I can
>> to get it.  Please just let me know.
> 
> If you are not printing, try setting:
> 
> disable spoolss = yes.
> 
> That might work around it.  To get us the info we need getting a gdb
> backtrace from the crashing process or the resulting core would be very
> helpful.
> 
> Thanks,
> 
> Andrew Bartlett
> 
> -- 
> Andrew Bartlett                       http://samba.org/~abartlet/
> Authentication Developer, Samba Team  http://samba.org
> Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba
I’ll do my best to get this to you.  I’m sure the dump would be the most
helpful, so I’m going to see what I can do.  For the time being, I’m going to
investigate and test what Kevin Davidson suggested previously and if that fails
or isn’t as good as I would like, maybe we will have some headway for a working
Samba install on Mac OS X in the future.

Thanks!

Mike

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