[Bug 212862] contrib/netbsd-tests/fs/tmpfs/t_mount:large fails on FreeBSD

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212862

            Bug ID: 212862
           Summary: contrib/netbsd-tests/fs/tmpfs/t_mount:large fails on
                    FreeBSD
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: tests
          Assignee: freebsd-testing at freebsd.org
          Reporter: ngie at FreeBSD.org

The t_mount:large testcase intentionally passes in values which are assumed to
overflow. These tests pass on FreeBSD.

(Simplified repro)

Run the following commands as root:

mkdir tmp
mount -t tmpfs -o size=9223372036854775808 tmpfs tmp
mount -t tmpfs -o size=9223372036854775808g tmpfs tmp
rmdir tmp

Expected results:

The above mount commands should fail with a non-zero exit code.

Actual results:

The commands pass:

# mount -t tmpfs -o size=9223372036854775808g tmpfs tmp
# echo $?
0
# mount -t tmpfs -o size=9223372036854775808 tmpfs tmp
# echo $?
0
#

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