[  43.4161057] panic: kernel diagnostic assertion "!topdown || hint <= orig_hint" failed: file "/syzkaller/managers/ci2-netbsd/kernel/sys/uvm/uvm_map.c", line 1795 map=0xffffa50013473200 hint=0xffffffffff002000 orig_hint=0x20ffe000 length=0x20ffe000 uobj=0x0 uoffset=0xffffffffffffffff align=0 flags=0x80010 entry=0xffffa50013c6aa00 (uvm_map_findspace line 1998)
[  43.4260948] cpu1: Begin traceback...
[  43.4360968] vpanic() at netbsd:vpanic+0x282 sys/kern/subr_prf.c:293
[  43.4560956] _sub_D_65535_0() at netbsd:_sub_D_65535_0+-0x34c4
[  43.4960956] uvm_findspace_invariants() at netbsd:uvm_findspace_invariants+0x11e sys/uvm/uvm_map.c:1795
[  43.5260974] uvm_map_findspace() at netbsd:uvm_map_findspace+0x411 sys/uvm/uvm_map.c:1999
[  43.5560954] uvm_map_prepare() at netbsd:uvm_map_prepare+0x504 sys/uvm/uvm_map.c:1181
[  43.5860956] uvm_map() at netbsd:uvm_map+0x14d sys/uvm/uvm_map.c:1089
[  43.6160997] uvm_mmap.part.0() at netbsd:uvm_mmap.part.0+0x2e1
[  43.6460941] sys_mmap() at netbsd:sys_mmap+0xa5e uvm_mmap sys/uvm/uvm_mmap.c:875 [inline]
[  43.6460941] sys_mmap() at netbsd:sys_mmap+0xa5e sys/uvm/uvm_mmap.c:425
[  43.6760946] compat_43_sys_mmap() at netbsd:compat_43_sys_mmap+0x255 sys/compat/common/vm_43.c:149
[  43.7060934] sys_syscall() at netbsd:sys_syscall+0x10e sy_call sys/sys/syscallvar.h:65 [inline]
[  43.7060934] sys_syscall() at netbsd:sys_syscall+0x10e sys/kern/sys_syscall.c:90
[  43.7360937] syscall() at netbsd:syscall+0x25a sy_call sys/sys/syscallvar.h:65 [inline]
[  43.7360937] syscall() at netbsd:syscall+0x25a sy_invoke sys/sys/syscallvar.h:94 [inline]
[  43.7360937] syscall() at netbsd:syscall+0x25a sys/arch/x86/x86/syscall.c:138
[  43.7460941] --- syscall (number 71 via SYS_syscall) ---
[  43.7560921] netbsd:syscall+0x25a:
[  43.7560921] cpu1: End traceback...
[  43.7660935] fatal breakpoint trap in supervisor mode
[  43.7660935] trap type 1 code 0 rip 0xffffffff80220a4d cs 0x8 rflags 0x282 cr2 0xffffa5019d7fc000 ilevel 0 rsp 0xffffa5019d8b75b0
[  43.7760892] curlwp 0xffffa500133b2240 pid 1224.1224 lowest kstack 0xffffa5019d8b02c0