Applying the patch on a upgraded 12.1.0.1 Linux installation gives the following opatchauto output:
Configuration Validation: Successful
Patch Location: /u01/source/grid/19971324
Grid Infrastructure Patch(es): 17077442 17303297 19769486
DB Patch(es): 17077442 19769486
Patch Validation: Successful
Grid Infrastructure home:
/u01/app/12.1.0
Performing prepatch operations on CRS Home... Successful
Applying patch(es) to "/u01/app/12.1.0/grid" ...
Patch "/u01/source/oracle12/19971324/17077442" successfully applied to "/u01/app/12.1.0".
Patch "/u01/source/oracle12/19971324/17303297" successfully applied to "/u01/app/12.1.0".
Patch "/u01/source/oracle12/19971324/19769486" successfully applied to "/u01/app/12.1.0".
Performing postpatch operations on CRS Home... Failed
Command "/u01/app/12.1.0/perl/bin/perl -I/u01/app/12.1.0/perl/lib -I/u01/app/12.1.0/OPatch/opatchautotemp/patchwork/crs/install /u01/app/12.1.0/OPatch/opatchautotemp/patchwork/crs/install/rootcrs.pl -postpatch" execution failed:
Died at /u01/app/12.1.0/OPatch/opatchautotemp/patchwork/crs/install/crspatch.pm line 885.