Segmentation fault in multipath RHEL 7.3

Issue

• After updating device-mapper-multipath rpms to 0.4.9-99.el7.x86_64 or later, there are segfaults observed for multipathd and libc:

  $ grep segfault var/log/messages*
  Jun  6 10:16:06 hostname kernel: multipath[1954]: segfault at 0 ip 00007f98d91544db sp 00007fff7f4bd718 error 4 in libc-2.17.so[7f98d901f000+1b7000]
  Jun  6 10:16:48 hostname kernel: multipath[23218]: segfault at 0 ip 00007f767e7bc4db sp 00007ffdc6c755f8 error 4 in libc-2.17.so[7f767e687000+1b7000]
  Jun  6 10:16:48 hostname kernel: multipathd[23224]: segfault at 0 ip 00007f107b4404db sp 00007ffcaa7c2de8 error 4 in libc-2.17.so[7f107b30b000+1b7000]
  

• The current issue is being observed only when there is a no_path_retry option enabled for all devices by adding all_devs yes option:

  $ less etc/multipath.conf 
  [...]
  devices {
      device {
      all_devs                yes     <----------
      no_path_retry           5       <----------
      }
  }
  [...]
  

• With above options added to /etc/multipath.conf file, if the multipath device maps are re-scanned with multipath -v2 or multipathd service is restarted, then it immediately results in a segmentation fault:

  [root@testsystem ~]# multipath -v2
  Segmentation fault
  
  Jun 15 17:10:06 testsystem kernel: multipath[15506]: segfault at 0 ip 00007f60c204a551 sp 00007ffcd1bbee50 error 4 in libc-2.17.so[7f60c1fab000+1b7000]
  
  [root@testsystem ~]# systemctl restart multipathd
  [root@testsystem ~]# 
  
  Jun 15 17:11:42 testsystem systemd: Starting Device-Mapper Multipath Device Controller...
  Jun 15 17:11:42 testsystem kernel: multipath[15514]: segfault at 0 ip 00007f4bd8b51551 sp 00007ffd37e89eb0 error 4 in libc-2.17.so[7f4bd8ab2000+1b7000]
  Jun 15 17:11:42 testsystem kernel: multipathd[15520]: segfault at 0 ip 00007f8efd097551 sp 00007ffd99598e70 error 4 in libc-2.17.so[7f8efcff8000+1b7000]
  Jun 15 17:11:42 testsystem systemd: Started Device-Mapper Multipath Device Controller.
  Jun 15 17:11:42 testsystem systemd: multipathd.service: main process exited, code=killed, status=11/SEGV
  Jun 15 17:11:42 testsystem systemd: Unit multipathd.service entered failed state.
  Jun 15 17:11:42 testsystem systemd: multipathd.service failed.