Comment # 2 on bug 1213721 from Jiri Bohac

yes, just read it.
See: https://github.com/openSUSE/kdump/blob/master/init/load.sh
First, on lines 373 and 374 it is tested that the two files (initrd and kernel)
in /var/lib/kdump exist.
On line 202 they are passed to kexec.
In between that, mkdumprd is called that compares timestamps and possibly
regenerates /var/lib/kdump/initrd but that does not seem to be blocked by
SELinux.

As noted in Comment #0, audit2allow suggested "allow kdump_t
kdump_var_lib_t:lnk_file read;" and that works.