[ 258.5931130] panic: kernel diagnostic assertion "so->so_pcb == NULL" failed: file "/syzkaller/managers/netbsd/kernel/sys/kern/uipc_socket.c", line 567 
[ 258.5931130] cpu0: Begin traceback...
[ 258.6031351] vpanic() at netbsd:vpanic+0x214
[ 258.6131487] _GLOBAL__sub_D_65535_0_cpu_configure() at netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
[ 258.6231639] socreate() at netbsd:socreate+0x35c
[ 258.6331796] fsocreate() at netbsd:fsocreate+0x19c
[ 258.6431957] sys___socket30() at netbsd:sys___socket30+0x96
[ 258.6532108] sys___syscall() at netbsd:sys___syscall+0xe2
[ 258.6632280] syscall() at netbsd:syscall+0x30e
[ 258.6738526] --- syscall (number 198) ---
[ 258.6738526] 73e7e7c3f4aa:
[ 258.6738526] cpu0: End traceback...

[ 258.6863950] dumping to dev 4,1 (offset=0, size=0): not possible
[ 258.6863950] rebooting...
SeaBIOS (version 1.8.2-20181029_212248-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 0x000f2a00: 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