[ 523.4872075] panic: kernel diagnostic assertion "pmap->pm_obj[i].uo_npages == 0" failed: file "/syzkaller/managers/netbsd/kernel/sys/arch/x86/x86/pmap.c", line 2464 
[ [ 552233.5.0550555707909] ]c pWAuR0N:I NBGeg: iSnP Ltr NaOceT bLaOcWkE..RE.
D[
 523.5055709]  ON SYSCALLv p6a0n ic0 (E)X IaTt  e2fc2800 7
n
[ 523.5055709] etbsd:vpanic+0x214
[ 523.5055709] _GLOBAL__sub_D_65535_0_cpu_configure() at netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
[ 523.5055709] WARNIpNmGap:_ dSePLs trNoOyT( L) OWaEtR ED ON TRAnPe tEbXIsdT :6pm a0
p[
 [5 2532.35.5005555770099] ] _dWAesRNtIroNyG:+0 Sx4PL0d 
N[
 523.5055709] OT LOWERED ON TRAP EXIT 6 0
[ 523.5055709] WARNING: SpmPLa pN_OppT _rLOemWEovREeD( ) ONa t TRAP EXIT 6 0
[ 523.505[57 05293] .5W0A5R5NI7N09G]:  nSePtLb sNdO:T pLmaOpW_EpRpE_D reOmN oTveR+A0P xE8X7I6T
[ 523.5055709]  6 0
[ 523.5055709] WARNING: SPL NOT LOWERED ON SYSCALL 0 -7u64v9m8_7a2no nEX_IdTi s0p os7
e
[ 523.5055709] () at netbsd:uvm_anon_dispose+0x179
[ 523.5055709] uvm_anon_freelst() at netbsd:uvm_anon_freelst+0x48
[ 523.5055709] amap_wipeout() at netbsd:amap_wipeout+0x237
[ 523.5055709] uvm_unmap_detach() at netbsd:uvm_unmap_detach+W0ARxN8bI
N[
 523.5055709] G: SPL NOT LOWERED ON SYSCALL 0 -4u9vm59s4pa75c2e8_f EreXeIT( )e 2a7t0 7000 7
[ [5 2523.35.050555577009]9]  WnAeRtNbIsNGd::u SvPmLs pNaOceT_ LfOrWeEe+RE0Dx 2O00N 
[ 523.5055709] TRAP EXIT 6 0
[ 523.5055709] WARNeIxiNtG1: (S)P La tN OT LOWEREDne tObNs Td:RAexP itE1XI+0Tx 639 d0


[ 523.5055709] WARNING: SPL NOT LOWERED ON TRAP sEysX_ITex 6it (0[
 
523.5055709] ) at netbsd:sys_exit+0x6c
[ 523.5055709] syscall() at netbsd:syscall+0x32e
[ 523.5055709] --- syscall (number 1) ---
[ 523.5055709] 7e9ff1efe47a:
[ 523.5055709] cpu0: End traceback...

[ 523.5055709] dumping to dev 4,1 (offset=0, size=0): not possible
[ 523.5055709] rebooting...
SeaBIOS (version 1.8.2-20190122_225043-google)
Total RAM Size = 0x00000001e0000000 = 7680 MiB
CPUs found: 2     Max CPUs supported: 2
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f29c0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Booting from Hard Disk 0...

>> NetBSD/x86 BIOS Boot, Revision 5.10 (Tue Jul 17 14:59:51 UTC 2018) (from NetBSD 8.0)
>> Memory: 639/3144640 k

     1. Boot normally
     2. Boot single user
     3. Disable ACPI
     4. Disable ACPI and SMP
     5. Drop to boot prompt