QA:Testcase multipath kpartx crash

Description

This testcase checks whether kpartx will crash when called with invalid options. It is reported in fixed bug that when kpartx was passes something other than a file or a block device or a badly formed pathname, it could read off the end of the device string, and crash. The test steps include:1)install device-mapper device-mapper-multipath 2)restart multipathd service 3)kpartx -l / 4)check dmesg if there is segmentation fault

How to test

1. Ensure the device-mapper-multipath package is installed

  Execute:dnf -y install device-mapper device-mapper-multipath
  Execute:rpm -qa

Expected Results

1. no Segmentation fault, kpartx no longer crashes when called with invalid options.