failed to run ["ssh" "-p" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/managers/i386/latest.tmp/key" "root@10.128.15.214" "pwd"]: exit status 255
ssh: connect to host 10.128.15.214 port 22: Operation timed out
Pseudo-terminal will not be allocated because stdin is not a terminal.
Warning: Permanently added '[ssh-serialport.googleapis.com]:9600' (RSA) to the list of known hosts.
serialport: Connected to syzkaller.us-central1-c.ci-freebsd-i386-test-0 port 1 (session ID: df8f49b62be2e3eac4aa2215c43d8a3fca78922c39d0491359cf00054654aa90, active connections: 1).
SeaBIOS (version 1.8.2-20190503_170316-google)
Total RAM Size = 0x0000000080000000 = 2048 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=6291456 = 3072 MiB
drive 0x000f2790: PCHS=0/0/0 translation=lba LCHS=780/128/63 s=6291456
Booting from Hard Disk 0...
Loading /boot/loader.conf.local
-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-Loading kernel...
\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\/boot/kernel/kernel text=0x1dfe9dc |/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|data=0x247778+0x819278 /-\|/-\|/-\|/-\|/-\syms=[0x8+0x1b9468|/-\|/-\|/-\|/+0x8+0x1a48a3-\|/-\|/-\|/-]
Loading configured modules...
\|/-\|/-/boot/entropy size=0x1000
\|/-\GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
---<<BOOT>>---
Copyright (c) 1992-2019 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 13.0-CURRENT 7b9ebd04c7f3(HEAD) SYZKALLER amd64
FreeBSD clang version 8.0.1 (branches/release_80 363030) (based on LLVM 8.0.1)
WARNING: WITNESS option enabled, expect reduced performance.
VT(vga): text 80x25
CPU: Intel(R) Xeon(R) CPU @ 2.30GHz (2047.29-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0x306f0  Family=0x6  Model=0x3f  Stepping=0
  Features=0x1f83fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2,SS,HTT>
  Features2=0xfefa3223<SSE3,PCLMULQDQ,VMX,SSSE3,FMA,CX16,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND,HV>
  AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
  AMD Features2=0x21<LAHF,ABM>
  Structured Extended Features=0x27eb<FSGSBASE,TSCADJ,BMI1,AVX2,FDPEXC,SMEP,BMI2,ERMS,INVPCID,NFPUSG>
  Structured Extended Features3=0x20000400<MD_CLEAR,ARCH_CAP>
  XSAVE Features=0x1<XSAVEOPT>
  IA32_ARCH_CAPS=0xc<RSBA,SKIP_L1DFL_VME>
  VT-x: PAT,HLT,PAUSE,EPT,UG,VPID
  TSC: P-state invariant
Hypervisor: Origin = "KVMKVMKVM"
real memory  = 2147483648 (2048 MB)
avail memory = 2030837760 (1936 MB)
Event timer "LAPIC" quality 600
ACPI APIC Table: <Google GOOGAPIC>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 1 package(s) x 1 core(s) x 2 hardware threads
random: unblocking device.
ioapic0 <Version 1.1> irqs 0-23 on motherboard
Launching APs: 1
random: entropy device external interface
[ath_hal] loaded
kbd1 at kbdmux0
module_register_init: MOD_LOAD (vesa, 0xffffffff817bab60, 0) error 19
random: registering fast source Intel Secure Key RNG
random: fast provider: "Intel Secure Key RNG"
000.000051 [4254] netmap_init               netmap: loaded module
nexus0
vtvga0: <VT VGA driver> on motherboard
cryptosoft0: <software crypto> on motherboard
acpi0: <Google GOOGRSDT> on motherboard
acpi0: Power Button (fixed)
acpi0: Sleep Button (fixed)
cpu0: <ACPI CPU> on acpi0
atrtc0: <AT realtime clock> port 0x70-0x71,0x72-0x77 irq 8 on acpi0
atrtc0: registered as a time-of-day clock, resolution 1.000000s
Event timer "RTC" frequency 32768 Hz quality 0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0xb008-0xb00b on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
isab0: <PCI-ISA bridge> at device 1.0 on pci0
isa0: <ISA bus> on isab0
pci0: <bridge> at device 1.3 (no driver attached)
virtio_pci0: <VirtIO PCI SCSI adapter> port 0xc000-0xc03f mem 0xfebfe000-0xfebfe07f irq 11 at device 3.0 on pci0
vtscsi0: <VirtIO SCSI Adapter> on virtio_pci0
virtio_pci1: <VirtIO PCI Network adapter> port 0xc040-0xc07f mem 0xfebff000-0xfebff07f irq 11 at device 4.0 on pci0
vtnet0: <VirtIO Networking Adapter> on virtio_pci1
vtnet0: Ethernet address: 42:01:0a:80:0f:d6
vtnet0: netmap queues/slots: TX 2/2048, RX 2/2048
000.000122 [ 503] vtnet_netmap_attach       vtnet attached txq=2, txd=2048 rxq=2, rxd=2048
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model IntelliMouse Explorer, device ID 4
uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
uart0: console (9600,n,8,1)
uart1: <16550 or compatible> port 0x2f8-0x2ff irq 3 on acpi0
uart2: <16550 or compatible> port 0x3e8-0x3ef irq 6 on acpi0
uart3: <16550 or compatible> port 0x2e8-0x2ef irq 7 on acpi0
orm0: <ISA Option ROM> at iomem 0xeb800-0xeffff pnpid ORM0000 on isa0
vga0: <Generic ISA VGA> at port 0x3b0-0x3bb iomem 0xb0000-0xb7fff pnpid PNP0900 on isa0
attimer0: <AT timer> at port 0x40 on isa0
Timecounter "i8254" frequency 1193182 Hz quality 0
attimer0: Can't map interrupt.
Timecounters tick every 10.000 msec
usb_needs_explore_all: no devclass
da0 at vtscsi0 bus 0 scbus0 target 1 lun 0
da0: <Google PersistentDisk 1> Fixed Direct Access SPC-4 SCSI device
da0: 4294967.295MB/s transfers
da0: Command Queueing enabled
da0: 3072MB (6291456 512 byte sectors)
WARNING: WITNESS option enabled, expect reduced performance.
Trying to mount root from ufs:/dev/gpt/rootfs [rw]...
GEOM: da0: the secondary GPT header is not in the last LBA.
panic: Bad entry start/end for new stack entry
cpuid = 0
time = 1561514196
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0016ae3370
vpanic() at vpanic+0x1e0/frame 0xfffffe0016ae33d0
panic() at panic+0x43/frame 0xfffffe0016ae3430
vm_map_stack_locked() at vm_map_stack_locked+0x364/frame 0xfffffe0016ae34a0
vm_map_stack() at vm_map_stack+0x11f/frame 0xfffffe0016ae3500
exec_new_vmspace() at exec_new_vmspace+0x4bd/frame 0xfffffe0016ae3570
exec_elf64_imgact() at exec_elf64_imgact+0x1262/frame 0xfffffe0016ae3670
kern_execve() at kern_execve+0x7d8/frame 0xfffffe0016ae39c0
start_init() at start_init+0x249/frame 0xfffffe0016ae3a60
fork_exit() at fork_exit+0xb0/frame 0xfffffe0016ae3ab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0016ae3ab0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 1 tid 100002 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why
db>