[Samba] ERROR: string overflow in safe_strcpy

c-ssugimoto at hitachijoho.com c-ssugimoto at hitachijoho.com
Fri Nov 30 06:33:36 GMT 2007

Hello All,

Our samba server rarely shows up follwing message in syslog.
When this message appears, CPU average will be pretty high.

winbindd[9585]: [2007/11/28 15:55:02, 0] lib/util_str.c:safe_strcpy_fn(659) 
winbindd[9585]:   ERROR: string overflow by 1 (256 - 255) in safe_strcpy [01092-6821 
winbindd[9585]:   S-1-5]

Hardware: Dell PowerEdge 2950
OS: Red Hat Enterprise Linux ES4 Update 4
Kernel: 2.6.9-55.0.2.ELsmp
RPM packages are:

Samba server is a member server of Win2003 R2 Active Directory.
And also, winbindd works with idmap_rid option.

My smb.conf is as below.

   workgroup = MYDOMAIN
   log file = /var/log/samba/%m.log
   max log size = 50
   security = ADS
   password server = ad.mydomain.com 
   encrypt passwords = yes
   socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
   dns proxy = no 
   idmap uid = 10000-50000
   idmap gid = 10000-50000
   idmap backend = idmap_rid:MYDOMAIN=10000-50000
   allow trusted domains = no
   template shell = /bin/false
   winbind use default domain = yes
   realm = MYDOMAIN.COM
   netbios name = pop
   winbind cache time = 900
   winbind separator = @
   template homedir = /home/%U
   Obey pam restrictions = yes

Does anyone have Knowledge or experienced?
Any help is appreciated,


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