[ 834.1368218] 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 [ 834.1568499] cpu1: Begin traceback... [ 834.1668699] vpanic() at netbsd:vpanic+0x214 [ 834.1668699] _GLOBAL__sub_D_65535_0_cpu_configure() at netbsd:_GLOBAL__sub_D_65535_0_cpu_configure [ 834.1869013] pmap_destroy() at netbsd:pmap_destroy+0x4a2 [ 834.1969140] pmap_pp_remove() at netbsd:pmap_pp_remove+0x876 [ 834.2069300] uvm_anon_dispose() at netbsd:uvm_anon_dispose+0x179 [ 834.2169456] uvm_anon_freelst() at netbsd:uvm_anon_freelst+0x48 [ 834.2269589] amap_wipeout() at netbsd:amap_wipeout+0x26b [ 834.2369750] uvm_unmap_detach() at netbsd:uvm_unmap_detach+0x8b [ 834.2469914] uvmspace_free() at netbsd:uvmspace_free+0x200 [ 834.2570088] exit1() at netbsd:exit1+0x364 [ 834.2670210] sys_exit() at netbsd:sys_exit+0x6c [ 834.2770437] syscall() at netbsd:syscall+0x32e [ 834.2870513] --- syscall (number 1) --- [ 834.2870513] 77fe462fe47a: [ 834.2970669] cpu1: End traceback... [ 834.2970669] dumping to dev 4,1 (offset=0, size=0): not possible [ 834.3070804] rebooting... SeaBIOS (version 1.8.2-20190322_093631-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