[Samba] runaway process in 3.0.21b

[Mitja Muženič]

Hi!


I'm running 3.0.21b on OpenBSD 3.8-stable (i386) with raidframe. Without any
apparent cause one of the smbd child processes has started to badly leak
memory (approx. 10Mb / minute) and possibly busy waiting, persistant across
reboots. The server has been running flawlessly in production for over three
months and absolutely nothing has changed on the server since it went into
production.

In my setup samba is PDC, with security=user, map to guest = Bad User and a
share with guest=ok. The runaway process is serving a guest user that is
accessing a single 2.5KB text file few times a minute. 

--------------
load averages:  0.42,  0.87,  1.71
10:45:59
23 processes:  22 idle, 1 on processor
CPU states:  0.0% user,  0.0% nice,  0.0% system,  0.2% interrupt, 99.8%
idle
Memory: Real: 290M/338M act/tot  Free: 160M  Swap: 2372K/256M used/tot

  PID USERNAME PRI NICE  SIZE   RES STATE    WAIT     TIME    CPU COMMAND
30693 Guest      2    0  284M  284M sleep    select   0:24  0.44% smbd
--------------
load averages:  0.28,  0.56,  1.35
10:50:14
23 processes:  22 idle, 1 on processor
CPU states:  0.0% user,  0.0% nice,  0.0% system,  0.2% interrupt, 99.8%
idle
Memory: Real: 348M/397M act/tot  Free: 101M  Swap: 2372K/256M used/tot

  PID USERNAME PRI NICE  SIZE   RES STATE    WAIT     TIME    CPU COMMAND
30693 Guest      2    0  342M  342M sleep    select   0:29  1.03% smbd
-------------

It can reach over 1G.

# smbstatus |grep 30675
AB           30675   recepcija     Mon Mar  6 18:09:06 2006
30675        DENY_NONE  0x20089     RDONLY     EXCLUSIVE+BATCH
/var/shared/AB   gdat/ini/G_dat.ini   Mon Mar  6 18:30:50 2006
# ls -lrt  /var/shared/AB/gdat/ini/G_dat.ini
-rwxr--r--  1 Guest  wheel  2493 Mar  6 18:31
/var/shared/AB/gdat/ini/G_dat.ini


I have a debug 10 log file as well as a kernel trace, if it is of any help. 

Can anyone give me a hint on where to start looking? I have tried 3.0.20b
and 3.0.13 as well, and both gave me the same problem. 


Regards, Mitja

----------------
 # cat /etc/samba/smb.conf
 [global]
         dos charset = CP852
         workgroup = AAAA
         server string = xxxxx
         map to guest = Bad User
         passdb backend = tdbsam
         passwd program = /usr/bin/passwd %u
         log file = /var/log/smbd.%m
         max log size = 50
         mangle prefix = 6
         add user script = useradd -d /var/empty -s /sbin/nologin %u
         add group script = groupadd '%g'
         add machine script = useradd -d /var/empty -s /sbin/nologin -g
machines %u
         logon script = logon.bat
         logon path = \\%L\profile\%U\profile
         logon drive = z:
         logon home = \\%L\%U
         domain logons = Yes
         domain master = Yes
         dns proxy = No
         wins support = Yes
         ldap ssl = no
         load printers = no
 <..snip..>
 [AB]
         path = /var/shared/AB
         read only = No
         guest ok = Yes