make -C tools/testing/selftests TARGETS="net/forwarding" TEST_PROGS=ip6gree_hier.sh TEST_GEN_PROGS="" run_tests
make: Entering directory '/home/virtme/testing-4/tools/testing/selftests'
make[1]: Entering directory '/home/virtme/testing-4/tools/testing/selftests/net/forwarding'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/virtme/testing-4/tools/testing/selftests/net/forwarding'
make[1]: Entering directory '/home/virtme/testing-4/tools/testing/selftests/net/forwarding'
TAP version 13
1..1
# overriding timeout to 21600
# selftests: net/forwarding: ip6gre_hier.sh

DETECTED CRASH, lowering timeout
# 18.12 [+18.12] TEST: GRE hierarchical IPv4-in-IPv6                                 [ OK ]
# 20.06 [+1.94] TEST: GRE hierarchical IPv6-in-IPv6                                 [ OK ]
# 22.82 [+2.76] TEST: ping GRE IPv6, packet size 1800 after MTU change              [ OK ]
# 25.23 [+2.41] TEST: GRE hierarchical IPv4-in-IPv6 (new remote)                    [ OK ]
# 27.27 [+2.05] TEST: GRE hierarchical IPv6-in-IPv6 (new remote)                    [ OK ]
# 29.99 [+2.72] TEST: GRE hierarchical IPv4-in-IPv6 (old remote)                    [ OK ]
# 31.96 [+1.96] TEST: GRE hierarchical IPv6-in-IPv6 (old remote)                    [ OK ]
ok 1 selftests: net/forwarding: ip6gre_hier.sh
make[1]: Leaving directory '/home/virtme/testing-4/tools/testing/selftests/net/forwarding'
make: Leaving directory '/home/virtme/testing-4/tools/testing/selftests'
xx__-> echo $?
0
xx__->