[Bug 206583] Unable to load ip_mroute kernel module if VIMAGE is enabled in kernel

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206583

            Bug ID: 206583
           Summary: Unable to load ip_mroute kernel module if VIMAGE is
                    enabled in kernel
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: woodsb02 at gmail.com

When running a kernel with VIMAGE support, loading the ip_mroute kernel module
will fail.

% sudo kldload -v ip_mroute
kldload: an error occurred while loading the module. Please check dmesg(8) for
more details.
% dmesg
linker_load_file: Unsupported file type
% uname -a
FreeBSD sparticus.woods.am 11.0-CURRENT FreeBSD 11.0-CURRENT #1 r294463: Sun
Jan 24 17:17:25 CET 2016    
root at freenas.woods.am:/usr/obj/usr/src/sys/GENERIC-NODEBUG-VIMAGE  amd64


If I recompile the kernel with the same sources, with the only change being to
disable VIMAGE (in this case using the GENERIC-NODEBUG kernel), then after
reboot I am able to load the ip_mroute kernel option successfully.

Expected result: ip_mroute kernel module should be able to load regardless of
whether VIMAGE support is enabled in the kernel or not.

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