make -C tools/testing/selftests TARGETS=net TEST_PROGS=ip_defrag.sh TEST_GGEN_PROGS="" run_tests
make: Entering directory '/home/virtme/testing-3/tools/testing/selftests'
make: *** [Makefile:183: all] Segmentation fault
make: Leaving directory '/home/virtme/testing-3/tools/testing/selftests'
xx__-> echo $?
2
xx__->