[Samba] PANIC in the logs

[Rowland penny]

On 18/02/2021 16:58, Andrea Cucciarre' via samba wrote:
> Hello,
>
> I am running samba Version 4.11.6-Ubuntu as a Domain Member, I have 
> used the step outlined in the following links to install:
>
> https://wiki.samba.org/index.php/Distribution-specific_Package_Installation 
>
>
> and I have successfully joined it to an AD Domain
>
> I have noticed the following PANIC messages in the logs, is that 
> something to worry about?


You should always worry about Samba crashing or panicking

>
> [2021/02/18 16:19:29.475973,  3] 
> ../../source3/winbindd/winbindd_util.c:295(add_trusted_domain)
>   add_trusted_domain: Added domain [BUILTIN] [(null)] [S-1-5-32]
> [2021/02/18 16:19:29.483578,  3] 
> ../../source3/winbindd/winbindd_util.c:295(add_trusted_domain)
>   add_trusted_domain: Added domain [HF-ANDREA-2-334] [(null)] 
> [S-1-5-21-1420973400-2726068461-2848185591]
> [2021/02/18 16:19:29.492179,  3] 
> ../../source3/winbindd/winbindd_util.c:295(add_trusted_domain)
>   add_trusted_domain: Added domain [HF4] [HF4.LOCAL] 
> [S-1-5-21-2512033921-2951786130-3794972812]
> [2021/02/18 16:19:29.502351,  0] ../../lib/util/fault.c:79(fault_report)
>   ===============================================================
> [2021/02/18 16:19:29.502846,  0] ../../lib/util/fault.c:80(fault_report)
>   INTERNAL ERROR: Signal 7 in pid 227 (4.11.6-Ubuntu)
>   If you are running a recent Samba version, and if you think this 
> problem is not yet fixed in the latest versions, please consider 
> reporting this bug, see https://wiki.samba.org/index.php/Bug_Reporting
> [2021/02/18 16:19:29.503247,  0] ../../lib/util/fault.c:86(fault_report)
>   ===============================================================
> [2021/02/18 16:19:29.503482,  0] 
> ../../source3/lib/util.c:823(smb_panic_s3)
>   PANIC (pid 227): internal error
> [2021/02/18 16:19:29.504663,  0] 
> ../../lib/util/fault.c:264(log_stack_trace)
>   BACKTRACE: 19 stack frames:
>    #0 /lib/x86_64-linux-gnu/libsamba-util.so.0(log_stack_trace+0x34) 
> [0x7fa2abb26154]
>    #1 /lib/x86_64-linux-gnu/libsmbconf.so.0(smb_panic_s3+0x1f) 
> [0x7fa2aba47b2f]
>    #2 /lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0x33) 
> [0x7fa2abb26253]
>    #3 /lib/x86_64-linux-gnu/libsamba-util.so.0(+0x194b1) [0x7fa2abb264b1]
>    #4 /lib/x86_64-linux-gnu/libpthread.so.0(+0x153c0) [0x7fa2ab19c3c0]
>    #5 /lib/x86_64-linux-gnu/libc.so.6(+0x18e70e) [0x7fa2ab10c70e]
>    #6 /lib/x86_64-linux-gnu/libtdb.so.1(+0xa9df) [0x7fa2ab40a9df]
>    #7 /lib/x86_64-linux-gnu/libtdb.so.1(+0xb25e) [0x7fa2ab40b25e]
>    #8 /lib/x86_64-linux-gnu/libtdb.so.1(+0x9fd3) [0x7fa2ab409fd3]
>    #9 /lib/x86_64-linux-gnu/libtdb.so.1(+0xb119) [0x7fa2ab40b119]
>    #10 /lib/x86_64-linux-gnu/libtdb.so.1(+0x9e32) [0x7fa2ab409e32]
>    #11 /lib/x86_64-linux-gnu/libtdb.so.1(+0xa281) [0x7fa2ab40a281]
>    #12 /lib/x86_64-linux-gnu/libtdb.so.1(+0x65f9) [0x7fa2ab4065f9]
>    #13 /lib/x86_64-linux-gnu/libtdb.so.1(tdb_append+0xa3) 
> [0x7fa2ab406ca3]
>    #14 
> /usr/lib/x86_64-linux-gnu/samba/libserver-id-db.so.0(server_id_db_add+0x140) 
> [0x7fa2aac50890]
>    #15 
> /usr/lib/x86_64-linux-gnu/samba/libMESSAGING.so.0(irpc_add_name+0x11) 
> [0x7fa2abaae6b1]
>    #16 /usr/sbin/winbindd(main+0xd14) [0x55cdbf73db04]
>    #17 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) 
> [0x7fa2aafa50b3]
>    #18 /usr/sbin/winbindd(_start+0x2e) [0x55cdbf73e1ae]
> [2021/02/18 16:19:29.507165,  0] 
> ../../source3/lib/dumpcore.c:317(dump_core)
>   coredump is handled by helper binary specified at 
> /proc/sys/kernel/core_pattern[2021/02/18 16:19:30.822480,  3] 
> ../../source3/param/loadparm.c:3873(lp_load_ex)
>   lp_load_ex: refreshing parameters
>
> My smb.conf is the following:
>
> [global]
>
> security = ads
> realm = HF4.LOCAL
> workgroup = HF4
> netbios name = hf-andrea-2-334
> log file = /hyperfile/gluster-cache/logs/winbindd/2/log.%I
> idmap config * : backend = tdb
> idmap config * : range = 3000-7999
> idmap config HF4 : backend = rid
> idmap config HF4 : range = 10000-999999
> log level = 5
> max log size = 10000
> winbind refresh tickets = Yes
> winbind offline logon = true
> vfs objects = acl_xattr
> map acl inherit = Yes
> store dos attributes = Yes
> dedicated keytab file = /etc/krb5.keytab
> kerberos method = secrets and keytab
> client signing = yes
> client use spnego = yes
> template shell = /bin/bash
> template homedir = /home/%U
> logging = file
> server role = standalone server
> map to guest = bad user
> usershare allow guests = no


Try removing the 'server role' line, this may be overriding 'security = 
ads', this may fix your problem, but it shouldn't panic.

Can I also suggest you upgrade Samba.

Rowland