VMWare snapshot converted to a .core file fails to open with the crash utility

Solution Verified - Updated -


  • VMWare snapshot converted to a .core file using "vmss2core-Linux64" utility fails to open even after a successful conversion and shows the following error message :
log: zero-size memory allocation! (called from 4e23f6)
  • Manual retrace leads to the error shown below :
# crash vmss.core /usr/lib/debug/lib/modules/3.10.0-862.11.6.el7.x86_64/vmlinux 

crash 7.2.3
Copyright (C) 2002-2017  Red Hat, Inc.
Copyright (C) 2004, 2005, 2006, 2010  IBM Corporation
WARNING: cannot read linux_banner string
crash: /usr/lib/debug/lib/modules/3.10.0-862.11.6.el7.x86_64/vmlinux and vmss.core do not match!


  crash [OPTION]... NAMELIST MEMORY-IMAGE[@ADDRESS]    (dumpfile form)
  crash [OPTION]... [NAMELIST]                     (live system form)

Enter "crash -h" for details.
  • .core opened in the --minimal mode leads to the same error as well.


  • Guest OS on VMWare
  • Observed on RHEL 7.5 kernels and above

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