[Samba] Failed to Set UID Error and Can't become connected user Error

Jeff Skoubye skoubyed at comcast.net
Sat Mar 8 03:54:22 GMT 2008 

I am certainly not an expert on Samba, so I apologize in advance for 
this question if I should know the answer.  A week ago our main file 
server crashed and had to be replaced.  Our new server is running Fedora 
Core 8 and Samba 3.0.26a-6 but has been very unstable.  We are running a 
small network of Windows XP Pro and Home clients accessing the server 
(10 clients).

ERROR ONE:

I am getting two errors in the logs, one fairly serious and one not 
creating many problems as far as usability.  I don't know if these 
errors are related but I suspect they are.  First the more serious 
error.  This is occurring only occasionally on different clients at 
different times, and the client that is causing this error will loose 
connection for a minute and has to restart some of the programs they are 
in.  Here is the log of this more serious error:

[2008/03/07 10:32:10, 0] lib/util_sec.c:set_effective_uid(205)
  setresuid failed with EAGAIN. uid(502) might be over its NPROC limit
[2008/03/07 10:32:10, 0] lib/util_sec.c:assert_uid(101)
  Failed to set uid privileges to (-1,502) now set to (0,0)
[2008/03/07 10:32:10, 0] lib/util.c:smb_panic(1654)
  PANIC (pid 32012): failed to set uid

[2008/03/07 10:32:10, 0] lib/util.c:log_stack_trace(1758)
  BACKTRACE: 22 stack frames:
   #0 /usr/sbin/smbd(log_stack_trace+0x2d) [0xb7d7d79d]
   #1 /usr/sbin/smbd(smb_panic+0x5d) [0xb7d7d8cd]
   #2 /usr/sbin/smbd [0xb7d83d9e]
   #3 /usr/sbin/smbd [0xb7beed2c]
   #4 /usr/sbin/smbd(pop_sec_ctx+0xa2) [0xb7beeec2]
   #5 /usr/sbin/smbd(unbecome_root+0x17) [0xb7be2587]
   #6 /usr/sbin/smbd(gid_to_sid+0x15c) [0xb7d339bc]
   #7 /usr/sbin/smbd [0xb7bf58fc]
   #8 /usr/sbin/smbd(get_nt_acl+0x4ac) [0xb7bfc0cc]
   #9 /usr/sbin/smbd [0xb7c123bb]
   #10 /usr/sbin/smbd(is_visible_file+0x2a0) [0xb7b9a030]
   #11 /usr/sbin/smbd [0xb7b9a75d]
   #12 /usr/sbin/smbd(dptr_ReadDirName+0x51) [0xb7b9a7c1]
   #13 /usr/sbin/smbd [0xb7bd3a71]
   #14 /usr/sbin/smbd [0xb7bd7e45]
   #15 /usr/sbin/smbd(handle_trans2+0x237) [0xb7bdba57]
   #16 /usr/sbin/smbd(reply_trans2+0x6bb) [0xb7be220b]
   #17 /usr/sbin/smbd [0xb7bfef20]
   #18 /usr/sbin/smbd(smbd_process+0x836) [0xb7bfffb6]
   #19 /usr/sbin/smbd(main+0xbdd) [0xb7e5a90d]
   #20 /lib/libc.so.6(__libc_start_main+0xe0) [0x389390]
   #21 /usr/sbin/smbd [0xb7b83261]
[2008/03/07 10:32:10, 0] lib/fault.c:dump_core(181)
  dumping core in /var/log/samba/cores/smbd
[2008/03/07 10:32:10, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:32:12, 1] smbd/service.c:make_connection_snum(1033)
  drn (10.200.0.8) connect to service osnopen initially as user smbuser 
(uid=508, gid=508) (pid 834)
[2008/03/07 10:32:27, 1] smbd/service.c:make_connection_snum(1033)
  drn (10.200.0.8) connect to service OSN initially as user drn 
(uid=502, gid=508) (pid 834)
[2008/03/07 10:32:27, 0] lib/util_sec.c:set_effective_uid(205)
  setresuid failed with EAGAIN. uid(502) might be over its NPROC limit
[2008/03/07 10:32:27, 0] lib/util_sec.c:assert_uid(101)
  Failed to set uid privileges to (-1,502) now set to (0,0)
[2008/03/07 10:32:27, 0] lib/util.c:smb_panic(1654)
  PANIC (pid 834): failed to set uid

[2008/03/07 10:32:27, 0] lib/util.c:log_stack_trace(1758)
  BACKTRACE: 22 stack frames:
   #0 /usr/sbin/smbd(log_stack_trace+0x2d) [0xb7d7d79d]
   #1 /usr/sbin/smbd(smb_panic+0x5d) [0xb7d7d8cd]
   #2 /usr/sbin/smbd [0xb7d83d9e]
   #3 /usr/sbin/smbd [0xb7beed2c]
   #4 /usr/sbin/smbd(pop_sec_ctx+0xa2) [0xb7beeec2]
   #5 /usr/sbin/smbd(unbecome_root+0x17) [0xb7be2587]
   #6 /usr/sbin/smbd(gid_to_sid+0x15c) [0xb7d339bc]
   #7 /usr/sbin/smbd [0xb7bf58fc]
   #8 /usr/sbin/smbd(get_nt_acl+0x4ac) [0xb7bfc0cc]
   #9 /usr/sbin/smbd [0xb7c123bb]
   #10 /usr/sbin/smbd(is_visible_file+0x2a0) [0xb7b9a030]
   #11 /usr/sbin/smbd [0xb7b9a75d]
   #12 /usr/sbin/smbd(dptr_ReadDirName+0x51) [0xb7b9a7c1]
   #13 /usr/sbin/smbd [0xb7bd3a71]
   #14 /usr/sbin/smbd [0xb7bd7e45]
   #15 /usr/sbin/smbd(handle_trans2+0x237) [0xb7bdba57]
   #16 /usr/sbin/smbd(reply_trans2+0x6bb) [0xb7be220b]
   #17 /usr/sbin/smbd [0xb7bfef20]
   #18 /usr/sbin/smbd(smbd_process+0x836) [0xb7bfffb6]
   #19 /usr/sbin/smbd(main+0xbdd) [0xb7e5a90d]
   #20 /lib/libc.so.6(__libc_start_main+0xe0) [0x389390]
   #21 /usr/sbin/smbd [0xb7b83261]
[2008/03/07 10:32:27, 0] lib/fault.c:dump_core(181)
  dumping core in /var/log/samba/cores/smbd

ERROR TWO:

The second error repeats almost constantly but doesn't seem to create 
any actual problems on the client side.  This is the error:

[2008/03/07 09:54:17, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 09:54:27, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 09:54:27, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 09:55:33, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 09:55:33, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:00:20, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:00:34, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:00:34, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:01:46, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:01:46, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:01:50, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:01:50, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:11:14, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:11:14, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:11:14, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:11:33, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:11:33, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!
[2008/03/07 10:12:09, 0] smbd/service.c:make_connection_snum(928)
  Can't become connected user!


This is my SMB.conf file.

# Samba config file created using SWAT
# from 10.200.0.41 (10.200.0.41)
# Date: 2008/03/07 16:57:35

[global]
        workgroup = WWGP1
        netbios name = LINUXBOX3
        server string = Samba Server %v
        username map = /etc/samba/smbusers
        log level = 1
        smb ports = 139
        ldap ssl = no
        valid users = @wwgp1

[osn]
        comment = osn
        path = /home/samba/osn
        read only = No
        create mask = 0770
        directory mask = 0770
        hide unreadable = Yes

[fax]
        comment = fax
        path = /home/samba/fax
        force user = smbuser
        force group = wwgp1
        read only = No
        create mask = 0770
        directory mask = 0770

[osnexec]
        comment = osnexec
        path = /home/samba/osnexec
        valid users = @osnexec
        force group = osnexec
        read only = No
        create mask = 0770
        directory mask = 0770

[osnopen]
        comment = osnopen
        path = /home/samba/osnopen
        force user = smbuser
        force group = wwgp1
        read only = No
        create mask = 0770
        directory mask = 0770




Any help on this would be most appreciated.  I have searched and 
searched for what might be causing this without any real success.  I 
thought I had resolved some of this with a change to allow only port 
139.  It does seem to have slowed down some of the more serious errors, 
but has not solved it.  Thank you in advance for your help.

Sincerely,

Jeff Skoubye

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