Issue confirmed. Added trusty among the affected releases.
A new version is on the way.
** Also affects: samba (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: samba (Ubuntu Trusty)
Assignee: (unassigned) => Giampaolo Fresi Roglia (gianz)
** Changed in: samba (Ubuntu Trusty)
Status: New => Confirmed
** Changed in: samba (Ubuntu Xenial)
Status: New => Confirmed
** Changed in: samba (Ubuntu Bionic)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2115450
Title:
samba crashing when attempting to authenticate user after applying
updates for USN-7582-1
Status in samba package in Ubuntu:
Invalid
Status in samba source package in Trusty:
Confirmed
Status in samba source package in Xenial:
Confirmed
Status in samba source package in Bionic:
Confirmed
Bug description:
After applying the updates from
(https://ubuntu.com/security/notices/USN-7582-1) we are seeing
samba/winbind crash/panic when attempting to log in with SSH. The logs
are below. This is happening on both of our test 16.04/18.04 machines.
I'm not sure if related, but these machines also run the FIPS
kernel/etc. from ESM/Ubuntu Pro. Prior to the update samba is working
fine.
Jun 25 12:38:48 <machinename> systemd[1]: Started Samba Winbind Daemon.
Jun 25 12:38:48 <machinename> winbindd[21449]: [2025/06/25 12:38:48.460288,
0] ../lib/util/become_daemon.c:124(daemon_ready)
Jun 25 12:38:48 <machinename> winbindd[21449]: STATUS=daemon 'winbindd'
finished starting up and ready to serve connections
Jun 25 12:39:16 <machinename> winbindd[21473]: [2025/06/25 12:39:16.457152,
0] ../lib/util/fault.c:78(fault_report)
Jun 25 12:39:16 <machinename> winbindd[21473]:
===============================================================
Jun 25 12:39:16 <machinename> winbindd[21473]: [2025/06/25 12:39:16.457316,
0] ../lib/util/fault.c:79(fault_report)
Jun 25 12:39:16 <machinename> winbindd[21473]: INTERNAL ERROR: Signal 11 in
pid 21473 (4.7.6-Ubuntu)
Jun 25 12:39:16 <machinename> winbindd[21473]: Please read the
Trouble-Shooting section of the Samba HOWTO
Jun 25 12:39:16 <machinename> winbindd[21473]: [2025/06/25 12:39:16.457456,
0] ../lib/util/fault.c:81(fault_report)
Jun 25 12:39:16 <machinename> winbindd[21473]:
===============================================================
Jun 25 12:39:16 <machinename> winbindd[21473]: [2025/06/25 12:39:16.457555,
0] ../source3/lib/util.c:815(smb_panic_s3)
Jun 25 12:39:16 <machinename> winbindd[21473]: PANIC (pid 21473): internal
error
Jun 25 12:39:16 <machinename> winbindd[21473]: [2025/06/25 12:39:16.459181,
0] ../source3/lib/util.c:926(log_stack_trace)
Jun 25 12:39:16 <machinename> winbindd[21473]: BACKTRACE: 28 stack frames:
Jun 25 12:39:16 <machinename> winbindd[21473]: #0
/usr/lib/x86_64-linux-gnu/libsmbconf.so.0(log_stack_trace+0x1f) [0x7fd851987b7f]
Jun 25 12:39:16 <machinename> winbindd[21473]: #1
/usr/lib/x86_64-linux-gnu/libsmbconf.so.0(smb_panic_s3+0x20) [0x7fd851987c50]
Jun 25 12:39:16 <machinename> winbindd[21473]: #2
/usr/lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0x2f) [0x7fd854a979af]
Jun 25 12:39:16 <machinename> winbindd[21473]: #3
/usr/lib/x86_64-linux-gnu/libsamba-util.so.0(+0x19bc6) [0x7fd854a97bc6]
Jun 25 12:39:16 <machinename> winbindd[21473]: #4
/lib/x86_64-linux-gnu/libpthread.so.0(+0x12980) [0x7fd856774980]
Jun 25 12:39:16 <machinename> winbindd[21473]: #5
/usr/lib/x86_64-linux-gnu/samba/libkrb5-samba4.so.26(krb5_data_free+0x4)
[0x7fd8535141b4]
Jun 25 12:39:16 <machinename> winbindd[21473]: #6
/usr/lib/x86_64-linux-gnu/samba/libkrb5-samba4.so.26(krb5_pac_free+0xd)
[0x7fd85352e29d]
Jun 25 12:39:16 <machinename> winbindd[21473]: #7
/usr/lib/x86_64-linux-gnu/samba/libkrb5-samba4.so.26(krb5_pac_parse+0x9d)
[0x7fd85352e34d]
Jun 25 12:39:16 <machinename> winbindd[21473]: #8
/usr/lib/x86_64-linux-gnu/samba/libkrb5-samba4.so.26(krb5_rd_req_ctx+0x5a2)
[0x7fd853531d42]
Jun 25 12:39:16 <machinename> winbindd[21473]: #9
/usr/lib/x86_64-linux-gnu/samba/libgssapi-samba4.so.2(+0x1fce4) [0x7fd84d133ce4]
Jun 25 12:39:16 <machinename> winbindd[21473]: #10
/usr/lib/x86_64-linux-gnu/samba/libgssapi-samba4.so.2(gss_accept_sec_context+0x117)
[0x7fd84d1387c7]
Jun 25 12:39:16 <machinename> winbindd[21473]: #11
/usr/lib/x86_64-linux-gnu/samba/libgse.so.0(+0x9f67) [0x7fd84fe72f67]
Jun 25 12:39:16 <machinename> winbindd[21473]: #12
/usr/lib/x86_64-linux-gnu/samba/libgensec.so.0(gensec_update_ev+0x64)
[0x7fd8508b7fb4]
Jun 25 12:39:16 <machinename> winbindd[21473]: #13
/usr/sbin/winbindd(kerberos_return_pac+0x487) [0x5567252411a7]
Jun 25 12:39:16 <machinename> winbindd[21473]: #14
/usr/sbin/winbindd(winbindd_dual_pam_auth+0x1336) [0x556725255606]
Jun 25 12:39:16 <machinename> winbindd[21473]: #15
/usr/sbin/winbindd(+0x51d8c) [0x55672526bd8c]
Jun 25 12:39:16 <machinename> winbindd[21473]: #16
/usr/lib/x86_64-linux-gnu/libtevent.so.0(+0x9ed0) [0x7fd84e773ed0]
Jun 25 12:39:16 <machinename> winbindd[21473]: #17
/usr/lib/x86_64-linux-gnu/libtevent.so.0(+0x8357) [0x7fd84e772357]
Jun 25 12:39:16 <machinename> winbindd[21473]: #18
/usr/lib/x86_64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x9d)
[0x7fd84e76e7cd]
Jun 25 12:39:16 <machinename> winbindd[21473]: #19
/usr/sbin/winbindd(+0x54368) [0x55672526e368]
Jun 25 12:39:16 <machinename> winbindd[21473]: #20
/usr/sbin/winbindd(+0x54875) [0x55672526e875]
Jun 25 12:39:16 <machinename> winbindd[21473]: #21
/usr/lib/x86_64-linux-gnu/libtevent.so.0(tevent_common_loop_immediate+0xd4)
[0x7fd84e76f1a4]
Jun 25 12:39:16 <machinename> winbindd[21473]: #22
/usr/lib/x86_64-linux-gnu/libtevent.so.0(+0x9cfb) [0x7fd84e773cfb]
Jun 25 12:39:16 <machinename> winbindd[21473]: #23
/usr/lib/x86_64-linux-gnu/libtevent.so.0(+0x8357) [0x7fd84e772357]
Jun 25 12:39:16 <machinename> winbindd[21473]: #24
/usr/lib/x86_64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x9d)
[0x7fd84e76e7cd]
Jun 25 12:39:16 <machinename> winbindd[21473]: #25
/usr/sbin/winbindd(main+0xb20) [0x5567252402f0]
Jun 25 12:39:16 <machinename> winbindd[21473]: #26
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7fd84e39ac87]
Jun 25 12:39:16 <machinename> winbindd[21473]: #27
/usr/sbin/winbindd(_start+0x2a) [0x556725240ada]
Jun 25 12:39:16 <machinename> winbindd[21473]: [2025/06/25 12:39:16.460581,
0] ../source3/lib/util.c:827(smb_panic_s3)
Jun 25 12:39:16 <machinename> winbindd[21473]: smb_panic(): calling panic
action [/usr/share/samba/panic-action 21473]
Jun 25 12:39:16 <machinename> postfix/sendmail[21664]: fatal: no login name
found for user ID 1001110
Jun 25 12:39:16 <machinename> winbindd[21473]: [2025/06/25 12:39:16.526674,
0] ../source3/lib/util.c:835(smb_panic_s3)
Jun 25 12:39:16 <machinename> winbindd[21473]: smb_panic(): action returned
status 1
Jun 25 12:39:16 <machinename> winbindd[21473]: [2025/06/25 12:39:16.527609,
0] ../source3/lib/dumpcore.c:318(dump_core)
Jun 25 12:39:16 <machinename> winbindd[21473]: coredump is handled by
helper binary specified at /proc/sys/kernel/core_pattern
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