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Re: Bug#744178: winbind: segfault with kerberized authentication



On Vi, 11 apr 14, 08:23:35, David Schmitt wrote:
> Package: winbindd
> Version: 2:4.1.6+dfsg-1~bpo70+1
> Severity: normal
> 
> Hi,
 
Hi David,

Bugs against packages on backports have to be reported to 
debian-backports mailing list (in CC). This message will close the bug 
(it was filed against an inexistent package anyway), but please 
follow-up on -backports.

Full quote below for the benefit of -backports.

Kind regards,
Andrei

> this wheezy desktop is joined to a current samba4 domain on a testing host.
> 
> wbinfo --pam-logon works using cleartext auth, wbinfo -K (and others trying
> to use kerberos auth via wb) cause this segfault in kerberos:
> 
> >Apr 11 08:11:27 david-pc4 winbindd[13486]: [2014/04/11 08:11:27.739328,  0] ../lib/util/fault.c:72(fault_report)
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:   ===============================================================
> >Apr 11 08:11:27 david-pc4 winbindd[13486]: [2014/04/11 08:11:27.739443,  0] ../lib/util/fault.c:73(fault_report)
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:   INTERNAL ERROR: Signal 11 in pid 13486 (4.1.6-Debian)
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:   Please read the Trouble-Shooting section of the Samba HOWTO
> >Apr 11 08:11:27 david-pc4 winbindd[13486]: [2014/04/11 08:11:27.739526,  0] ../lib/util/fault.c:75(fault_report)
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:   ===============================================================
> >Apr 11 08:11:27 david-pc4 winbindd[13486]: [2014/04/11 08:11:27.739560,  0] ../source3/lib/util.c:785(smb_panic_s3)
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:   PANIC (pid 13486): internal error
> >Apr 11 08:11:27 david-pc4 winbindd[13486]: [2014/04/11 08:11:27.740379,  0] ../source3/lib/util.c:896(log_stack_trace)
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:   BACKTRACE: 27 stack frames:
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #0 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(log_stack_trace+0x1a) [0x7f8b44e18bba]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #1 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(smb_panic_s3+0x20) [0x7f8b44e18c90]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #2 /usr/lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0x2f) [0x7f8b491471bf]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #3 /usr/lib/x86_64-linux-gnu/libsamba-util.so.0(+0x1e3b6) [0x7f8b491473b6]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #4 /lib/x86_64-linux-gnu/libpthread.so.0(+0xf030) [0x7f8b49573030]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #5 /usr/lib/x86_64-linux-gnu/libkrb5.so.26(krb5_storage_free+0x1) [0x7f8b4395c9e1]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #6 /usr/lib/x86_64-linux-gnu/libkrb5.so.26(+0x482ad) [0x7f8b439422ad]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #7 /usr/lib/x86_64-linux-gnu/samba/libgse.so.0(+0x97ba) [0x7f8b459b47ba]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #8 /usr/lib/x86_64-linux-gnu/samba/libgse.so.0(gse_krb5_get_server_keytab+0x18b) [0x7f8b459b4d8b]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #9 /usr/lib/x86_64-linux-gnu/samba/libgse.so.0(+0xbb38) [0x7f8b459b6b38]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #10 /usr/lib/x86_64-linux-gnu/libgensec.so.0(gensec_start_mech+0x42) [0x7f8b45e457e2]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #11 /usr/lib/x86_64-linux-gnu/libgensec.so.0(gensec_start_mech_by_oid+0x2e) [0x7f8b45e45b3e]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #12 /usr/sbin/winbindd(kerberos_return_pac+0x491) [0x7f8b499d2901]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #13 /usr/sbin/winbindd(winbindd_dual_pam_auth+0xab8) [0x7f8b499e4d28]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #14 /usr/sbin/winbindd(+0x5894c) [0x7f8b499fa94c]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #15 /usr/lib/x86_64-linux-gnu/libtevent.so.0(+0x921b) [0x7f8b42e8121b]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #16 /usr/lib/x86_64-linux-gnu/libtevent.so.0(+0x76f6) [0x7f8b42e7f6f6]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #17 /usr/lib/x86_64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x9d) [0x7f8b42e7c02d]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #18 /usr/sbin/winbindd(+0x5ae6a) [0x7f8b499fce6a]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #19 /usr/sbin/winbindd(+0x5b565) [0x7f8b499fd565]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #20 /usr/lib/x86_64-linux-gnu/libtevent.so.0(tevent_common_loop_immediate+0xe2) [0x7f8b42e7c8e2]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #21 /usr/lib/x86_64-linux-gnu/libtevent.so.0(+0x8faa) [0x7f8b42e80faa]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #22 /usr/lib/x86_64-linux-gnu/libtevent.so.0(+0x76f6) [0x7f8b42e7f6f6]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #23 /usr/lib/x86_64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x9d) [0x7f8b42e7c02d]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #24 /usr/sbin/winbindd(main+0xaca) [0x7f8b499c9e2a]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #25 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f8b42b0bead]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:    #26 /usr/sbin/winbindd(+0x28531) [0x7f8b499ca531]
> >Apr 11 08:11:27 david-pc4 winbindd[13486]: [2014/04/11 08:11:27.747288,  0] ../source3/lib/dumpcore.c:317(dump_core)
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:   dumping core in /var/log/samba/cores/winbindd
> >Apr 11 08:11:27 david-pc4 winbindd[13486]:
> 
> I can provide the core file if necessary.
> 
> This setup worked with 2:4.1.5+dfsg-1~bpo70+1
> 
> Regards, David

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