Downgrading only samba package from 4.6.2-X to 4.4.4-14.el7_3 causes smb service crash.

Solution Verified - Updated -

Issue

  • I updated the samba package from 4.4.4-14.el7_3 to 4.6.2-X, but I needed to revert to the 4.4.4-14.el7_3 due to a problem. I downgraded only samba package.

    # yum update samba
    # yum downgrade samba-4.4.4-14.el7_3
    

-The smbd daemon crashes and multiple core files are dumped while starting up the service.

~~~
# systemctl start smb
# systemctl status smb
● smb.service - Samba SMB Daemon
Loaded: loaded (/usr/lib/systemd/system/smb.service; disabled; vendor preset: disabled)
Active: failed (Result: core-dump) since Wed 2017-10-04 15:00:00 JST; 10min ago
Process: 3878 ExecStart=/usr/sbin/smbd $SMBDOPTIONS (code=dumped, signal=ABRT)
Main PID: 3878 (code=dumped, signal=ABRT)
Status: "smbd: ready to serve connections..."

Oct 04 15:00:00 sambasvr smbd[3878]: #9 /lib64/libtevent.so.0(tevent_common_loop_wait+0x1b)...2fb]
Oct 04 15:00:00 sambasvr smbd[3878]: #10 /usr/sbin/smbd(main+0x15d4) [0x7fc0e6eadad4]
Oct 04 15:00:00 sambasvr smbd[3878]: #11 /lib64/libc.so.6(__libc_start_main+0xf5) [0x7fc0e29b7c05]
Oct 04 15:00:00 sambasvr smbd[3878]: #12 /usr/sbin/smbd(+0x7ea6) [0x7fc0e6eadea6]
Oct 04 15:00:00 sambasvr smbd[3878]: [2017/10/04 15:00:00.065096, 0] ../source3/lib/dumpcore....ore)
Oct 04 15:00:00 sambasvr smbd[3878]: dumping core in /var/log/samba/cores/smbd
Oct 04 15:00:00 sambasvr smbd[3878]:
Oct 04 15:00:00 sambasvr systemd[1]: smb.service: main process exited, code=dumped, status=6/ABRT
~~~

Environment

  • Red Hat Enterprise Linux 7
  • samba-4.4.4-***
  • libtevent-0.9.31-1.el7
  • libtalloc-2.1.9-1.el7

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