[Samba] winbind pam trouble

[lists]

Seems I cheered too early, and I have some more winbind issues I didn't 
realise before... here are winbind logs:

> [2016/04/11 20:39:01.330107,  1] ../source3/librpc/crypto/gse_krb5.c:416(fill_mem_keytab_from_system_keytab)
>   ../source3/librpc/crypto/gse_krb5.c:416: krb5_kt_start_seq_get failed (Permission denied)
> [2016/04/11 20:39:01.330143,  0] ../lib/util/fault.c:78(fault_report)
>   ===============================================================
> [2016/04/11 20:39:01.330173,  0] ../lib/util/fault.c:79(fault_report)
>   INTERNAL ERROR: Signal 11 in pid 4899 (4.2.9-SerNet-Debian-8.wheezy)
>   Please read the Trouble-Shooting section of the Samba HOWTO
> [2016/04/11 20:39:01.330199,  0] ../lib/util/fault.c:81(fault_report)
>   ===============================================================
> [2016/04/11 20:39:01.330217,  0] ../source3/lib/util.c:788(smb_panic_s3)
>   PANIC (pid 4899): internal error
> [2016/04/11 20:39:01.330733,  0] ../source3/lib/util.c:899(log_stack_trace)
>   BACKTRACE: 29 stack frames:
>    #0 /usr/lib/x86_64-linux-gnu/samba/libsmbconf.so.0(log_stack_trace+0x1a) [0x7f64c5f6699b]
>    #1 /usr/lib/x86_64-linux-gnu/samba/libsmbconf.so.0(smb_panic_s3+0x55) [0x7f64c5f66a99]
>    #2 /usr/lib/x86_64-linux-gnu/samba/libsamba-util.so.0(smb_panic+0x2d) [0x7f64c9883ed3]
>    #3 /usr/lib/x86_64-linux-gnu/samba/libsamba-util.so.0(+0x231ec) [0x7f64c98841ec]
>    #4 /lib/x86_64-linux-gnu/libpthread.so.0(+0xf0a0) [0x7f64cb2520a0]
>    #5 /usr/lib/x86_64-linux-gnu/samba/libkrb5-samba4.so.26(krb5_storage_free+0x4) [0x7f64c7f0ae4f]
>    #6 /usr/lib/x86_64-linux-gnu/samba/libkrb5-samba4.so.26(+0x3c7cd) [0x7f64c7ef67cd]
>    #7 /usr/lib/x86_64-linux-gnu/samba/libkrb5-samba4.so.26(krb5_kt_end_seq_get+0x2a) [0x7f64c7ef5eac]
>    #8 /usr/lib/x86_64-linux-gnu/samba/libgse-samba4.so(+0xa981) [0x7f64c4aaf981]
>    #9 /usr/lib/x86_64-linux-gnu/samba/libgse-samba4.so(gse_krb5_get_server_keytab+0x3db) [0x7f64c4aafdaa]
>    #10 /usr/lib/x86_64-linux-gnu/samba/libgse-samba4.so(+0xc644) [0x7f64c4ab1644]
>    #11 /usr/lib/x86_64-linux-gnu/samba/libgensec.so.0(gensec_start_mech+0x197) [0x7f64c4ce3eaf]
>    #12 /usr/lib/x86_64-linux-gnu/samba/libgensec.so.0(gensec_start_mech_by_oid+0xd9) [0x7f64c4ce4194]
>    #13 /usr/sbin/winbindd(kerberos_return_pac+0x5b2) [0x7f64cb6a8248]
>    #14 /usr/sbin/winbindd(winbindd_dual_pam_auth+0x792) [0x7f64cb6c6be5]
>    #15 /usr/sbin/winbindd(+0x5aa44) [0x7f64cb6dba44]
>    #16 /usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0x9771) [0x7f64c9001771]
>    #17 /usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0x7a2b) [0x7f64c8fffa2b]
>    #18 /usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(_tevent_loop_once+0x92) [0x7f64c8ffc3b1]
>    #19 /usr/sbin/winbindd(+0x5daef) [0x7f64cb6deaef]
>    #20 /usr/sbin/winbindd(+0x5dc57) [0x7f64cb6dec57]
>    #21 /usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0x4d68) [0x7f64c8ffcd68]
>    #22 /usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(tevent_common_loop_immediate+0x128) [0x7f64c8ffcc15]
>    #23 /usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0x94ba) [0x7f64c90014ba]
>    #24 /usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0x7a2b) [0x7f64c8fffa2b]
>    #25 /usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(_tevent_loop_once+0x92) [0x7f64c8ffc3b1]
>    #26 /usr/sbin/winbindd(main+0x11d5) [0x7f64cb6b7319]
>    #27 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f64c3879ead]
>    #28 /usr/sbin/winbindd(+0x26a09) [0x7f64cb6a7a09]
> [2016/04/11 20:39:01.330997,  0] ../source3/lib/dumpcore.c:313(dump_core)
>   unable to change to /var/log/samba/cores/winbindd
>   refusing to dump core

These errors sound serious and scary... A good idea, anyone?

MJ