I generated a synthetic LOR that hits a hard-coded relationship. The code now prints this:
```
lock order reversal:
1st 0xffff0000c27df5b0 lle (lle, rw) @ /home/jtl/src/sys/kern/subr_witness.c:3521
2nd 0xffff0000c27df590 so_rcv (so_rcv, sleep mutex) @ /home/jtl/src/sys/kern/subr_witness.c:3522
All lock orders from so_rcv -> lle:
"so_rcv" -> "tcphash" -> "in6_ifaddr_lock" -> "lle"
"so_rcv" -> "udphash" -> "in6_ifaddr_lock" -> "lle"
"so_rcv" -> "udphash" -> "lle"
Dynamic lock order "so_rcv"(sleep mutex) -> "tcphash"(sleep mutex) first seen at:
#0 0xffff00000054ce50 at witness_checkorder+0x32c
#1 0xffff0000004ad144 at __mtx_lock_flags+0x9c
#2 0xffff0000006b6d24 at tcp6_usr_listen+0x188
#3 0xffff00000058cf34 at solisten+0x48
#4 0xffff0000005956fc at kern_listen+0x74
#5 0xffff0000008be31c at do_el0_sync+0x68c
#6 0xffff0000008911ac at handle_el0_sync+0x4c
Hardcoded lock order "tcphash"(sleep mutex) -> "in6_ifaddr_lock"(rm) first seen at:
(No stack trace)
Dynamic lock order "so_rcv"(sleep mutex) -> "udphash"(sleep mutex) first seen at:
#0 0xffff00000054ce50 at witness_checkorder+0x32c
#1 0xffff0000004ad144 at __mtx_lock_flags+0x9c
#2 0xffff000000551858 at sysctl_debug_witness_generate_lor+0xc4
#3 0xffff0000004e7158 at sysctl_root_handler_locked+0xe4
#4 0xffff0000004e64a4 at sysctl_root+0x1e4
#5 0xffff0000004e6b3c at userland_sysctl+0x140
#6 0xffff0000004e69c0 at sys___sysctl+0x84
#7 0xffff0000008be31c at do_el0_sync+0x68c
#8 0xffff0000008911ac at handle_el0_sync+0x4c
Dynamic lock order "udphash"(sleep mutex) -> "in6_ifaddr_lock"(rm) first seen at:
#0 0xffff00000054ce50 at witness_checkorder+0x32c
#1 0xffff0000004ce06c at _rm_wlock_debug+0x78
#2 0xffff0000005518f4 at sysctl_debug_witness_generate_lor+0x160
#3 0xffff0000004e7158 at sysctl_root_handler_locked+0xe4
#4 0xffff0000004e64a4 at sysctl_root+0x1e4
#5 0xffff0000004e6b3c at userland_sysctl+0x140
#6 0xffff0000004e69c0 at sys___sysctl+0x84
#7 0xffff0000008be31c at do_el0_sync+0x68c
#8 0xffff0000008911ac at handle_el0_sync+0x4c
Dynamic lock order "in6_ifaddr_lock"(rm) -> "lle"(rw) first seen at:
#0 0xffff00000054ce50 at witness_checkorder+0x32c
#1 0xffff0000004d0980 at __rw_rlock_int+0x8c
#2 0xffff0000006cb804 at in6_lltable_lookup+0xe0
#3 0xffff0000006ead44 at nd6_lookup+0x74
#4 0xffff0000006f569c at find_pfxlist_reachable_router+0x88
#5 0xffff0000006f30fc at pfxlist_onlink_check+0x4b4
#6 0xffff0000006f29dc at nd6_ra_input+0x1198
#7 0xffff0000006c30c8 at icmp6_input+0x8c8
#8 0xffff0000006dd660 at ip6_input+0xec0
#9 0xffff00000063c104 at netisr_dispatch_src+0xd8
#10 0xffff00000061d44c at ether_demux+0x174
#11 0xffff00000061e9a0 at ether_nh_input+0x374
#12 0xffff00000063c104 at netisr_dispatch_src+0xd8
#13 0xffff00000061d894 at ether_input+0xdc
#14 0xffff0000006981e8 at tcp_lro_flush_all+0xec
#15 0xffff000000637700 at iflib_rxeof+0xbc4
#16 0xffff000000631990 at _task_fn_rx+0xa4
#17 0xffff0000005237f4 at gtaskqueue_run_locked+0x164
Dynamic lock order "udphash"(sleep mutex) -> "lle"(rw) first seen at:
#0 0xffff00000054ce50 at witness_checkorder+0x32c
#1 0xffff0000004d0980 at __rw_rlock_int+0x8c
#2 0xffff0000005518a4 at sysctl_debug_witness_generate_lor+0x110
#3 0xffff0000004e7158 at sysctl_root_handler_locked+0xe4
#4 0xffff0000004e64a4 at sysctl_root+0x1e4
#5 0xffff0000004e6b3c at userland_sysctl+0x140
#6 0xffff0000004e69c0 at sys___sysctl+0x84
#7 0xffff0000008be31c at do_el0_sync+0x68c
#8 0xffff0000008911ac at handle_el0_sync+0x4c
```
and this:
```
lock order reversal:
1st 0xffff0000c28205b0 lle (lle, rw) @ /home/jtl/src/sys/kern/subr_witness.c:3521
2nd 0xffff0000c2820590 so_rcv (so_rcv, sleep mutex) @ /home/jtl/src/sys/kern/subr_witness.c:3522
All lock orders from so_rcv -> lle:
"so_rcv" -> "tcphash" -> "lle"
"so_rcv" -> "tcphash" -> "in6_ifaddr_lock" -> "lle"
Dynamic lock order "so_rcv"(sleep mutex) -> "tcphash"(sleep mutex) first seen at:
#0 0xffff00000054ce50 at witness_checkorder+0x32c
#1 0xffff0000004ad144 at __mtx_lock_flags+0x9c
#2 0xffff0000006b6d24 at tcp6_usr_listen+0x188
#3 0xffff00000058cf34 at solisten+0x48
#4 0xffff0000005956fc at kern_listen+0x74
#5 0xffff0000008be31c at do_el0_sync+0x68c
#6 0xffff0000008911ac at handle_el0_sync+0x4c
Dynamic lock order "tcphash"(sleep mutex) -> "lle"(rw) first seen at:
#0 0xffff00000054ce50 at witness_checkorder+0x32c
#1 0xffff0000004d0980 at __rw_rlock_int+0x8c
#2 0xffff0000005518a4 at sysctl_debug_witness_generate_lor+0x110
#3 0xffff0000004e7158 at sysctl_root_handler_locked+0xe4
#4 0xffff0000004e64a4 at sysctl_root+0x1e4
#5 0xffff0000004e6b3c at userland_sysctl+0x140
#6 0xffff0000004e69c0 at sys___sysctl+0x84
#7 0xffff0000008be31c at do_el0_sync+0x68c
#8 0xffff0000008911ac at handle_el0_sync+0x4c
Hardcoded lock order "tcphash"(sleep mutex) -> "in6_ifaddr_lock"(rm) first seen at:
#0 0xffff00000054ce50 at witness_checkorder+0x32c
#1 0xffff0000004ce06c at _rm_wlock_debug+0x78
#2 0xffff0000005518f4 at sysctl_debug_witness_generate_lor+0x160
#3 0xffff0000004e7158 at sysctl_root_handler_locked+0xe4
#4 0xffff0000004e64a4 at sysctl_root+0x1e4
#5 0xffff0000004e6b3c at userland_sysctl+0x140
#6 0xffff0000004e69c0 at sys___sysctl+0x84
#7 0xffff0000008be31c at do_el0_sync+0x68c
#8 0xffff0000008911ac at handle_el0_sync+0x4c
Dynamic lock order "in6_ifaddr_lock"(rm) -> "lle"(rw) first seen at:
#0 0xffff00000054ce50 at witness_checkorder+0x32c
#1 0xffff0000004d0980 at __rw_rlock_int+0x8c
#2 0xffff0000006cb804 at in6_lltable_lookup+0xe0
#3 0xffff0000006ead44 at nd6_lookup+0x74
#4 0xffff0000006f569c at find_pfxlist_reachable_router+0x88
#5 0xffff0000006f30fc at pfxlist_onlink_check+0x4b4
#6 0xffff0000006f29dc at nd6_ra_input+0x1198
#7 0xffff0000006c30c8 at icmp6_input+0x8c8
#8 0xffff0000006dd660 at ip6_input+0xec0
#9 0xffff00000063c104 at netisr_dispatch_src+0xd8
#10 0xffff00000061d44c at ether_demux+0x174
#11 0xffff00000061e9a0 at ether_nh_input+0x374
#12 0xffff00000063c104 at netisr_dispatch_src+0xd8
#13 0xffff00000061d894 at ether_input+0xdc
#14 0xffff0000006981e8 at tcp_lro_flush_all+0xec
#15 0xffff000000637700 at iflib_rxeof+0xbc4
#16 0xffff000000631990 at _task_fn_rx+0xa4
#17 0xffff0000005237f4 at gtaskqueue_run_locked+0x164
```