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/main/latest.tmp/key" "root@10.128.0.50" "pwd"]: exit status 255
ssh: connect to host 10.128.0.50 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.
SeaBIOS (version 1.8.2-20190909_225952-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
2019/10/8 14:15:22 Begin firmware boot time (Seabios)
CPUs found: 2     Max CPUs supported: 2
Comparing RSDP and RSDP
Comparing RSDT and RSDT
Comparing FACP and FACP
Comparing FACS and FACS
return 0 for FACS vs FACS: SUCCESS
Comparing DSDT and DSDT
return 0 for DSDT vs DSDT: SUCCESS
return 0 for FACP vs FACP: SUCCESS
Comparing SRAT and SRAT
return 0 for SRAT vs SRAT: SUCCESS
Comparing APIC and APIC
return 0 for APIC vs APIC: SUCCESS
Comparing SSDT and SSDT
return 0 for SSDT vs SSDT: SUCCESS
Comparing WAET and WAET
return 0 for WAET vs WAET: SUCCESS
return 0 for RSDT vs RSDT: SUCCESS
return 0 for RSDP vs RSDP: SUCCESS
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 0x000f2560: PCHS=0/0/0 translation=lba LCHS=780/128/63 s=6291456
2019/10/8 14:15:22 End firmware boot time (Seabios)
Sending Seabios boot VM event.
Booting from Hard Disk 0...
Loading /boot/loader.conf.local
-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-Loading kernel...
\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\/boot/kernel/kernel text=0x1cad1d0 |/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-data=0x23ea88+0x63ea08 \|/-\|/-\|/-\|/-\|syms=[0x8+0x1a8a10/-\|/-\|/-\|/-+0x8+0x197af2\|/-\|/-\|/-\]
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 #364 4b1b8307328-c263218(HEAD): Tue Oct  8 14:07:57 UTC 2019
    root@ci-freebsd:/syzkaller/managers/main/kernel/obj/syzkaller/managers/main/kernel/amd64.amd64/sys/SYZKALLER amd64
FreeBSD clang version 8.0.1 (tags/RELEASE_801/final 366581) (based on LLVM 8.0.1)
WARNING: WITNESS option enabled, expect reduced performance.
WARNING: DIAGNOSTIC option enabled, expect reduced performance.
Entering uma_startup with 6 boot pages configured
startup_alloc from "UMA Kegs", 5 boot pages left
startup_alloc from "UMA Zones", 4 boot pages left
startup_alloc from "UMA Zones", 3 boot pages left
startup_alloc from "UMA Hash", 2 boot pages left
startup_alloc from "UMA Zones", 1 boot pages left
Entering uma_startup1 with 0 boot pages left
Entering uma_startup2 with 0 boot pages left
VT(vga): text 80x25
CPU: Intel(R) Xeon(R) CPU @ 2.30GHz (2299.99-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=0xac000400<MD_CLEAR,IBPB,STIBP,ARCH_CAP,SSBD>
  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 = 2030366720 (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: registering fast source Intel Secure Key RNG
random: fast provider: "Intel Secure Key RNG"
random: unblocking device.
ioapic0 <Version 1.1> irqs 0-23
Launching APs: 1
random: entropy device external interface
kbd1 at kbdmux0
000.000044 [4335] netmap_init               netmap: loaded module
module_register_init: MOD_LOAD (vesa, 0xffffffff81767c50, 0) error 19
[ath_hal] loaded
nexus0
vtvga0: <VT VGA driver>
cryptosoft0: <software crypto>
acpi0: <Google GOOGRSDT>
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:80:00:32
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.
NULL mp in getnewvnode(9), tag crossmp
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: 300.000MB/s transfers
da0: Command Queueing enabled
da0: 3072MB (6291456 512 byte sectors)
WARNING: WITNESS option enabled, expect reduced serialport: Connected to syzkaller.us-central1-c.ci-freebsd-main-test-0 port 1 (session ID: c0cdc5d27f716d24a419c0e4f59a66a16f69a3141e8997fb2dd4b74dd9ef6534, active connections: 1).
performance.
WARNING: DIAGNOSTIC 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.
Setting hostuuid: c5737494-45a4-11e9-9216-00a0980e0293.
Setting hostid: 0xdcc40b08.
No suitable dump device was found.
Starting file system checks:
/dev/gpt/rootfs: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/gpt/rootfs: clean, 188000 free (1264 frags, 23342 blocks, 0.2% fragmentation)
Mounting local filesystems:.
ELF ldconfig path: /lib /usr/lib /usr/lib/compat
32-bit compatibility ldconfig path:
Setting hostname: freebsd.
Setting up harvesting: PURE_RDRAND,[UMA],[FS_ATIME],SWI,INTERRUPT,NET_NG,[NET_ETHER],NET_TUN,MOUSE,KEYBOARD,ATTACH,CACHED
Feeding entropy: .
lo0: link state changed to UP
vtnet0: link state changed to UP
Starting Network: lo0 vtnet0.
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
	inet6 ::1 prefixlen 128
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2
	inet 127.0.0.1 netmask 0xff000000
	groups: lo
	nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
vtnet0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=6c07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
	ether 42:01:0a:80:00:32
	inet6 fe80::4001:aff:fe80:32%vtnet0 prefixlen 64 scopeid 0x1
	media: Ethernet 10Gbase-T <full-duplex>
	status: active
	nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
Starting devd.
Autoloading module: intpm.ko
intsmb0: <Intel PIIX4 SMBUS Interface> irq 9 at device 1.3 on pci0
intsmb0: Could not allocate I/O space
device_attach: intsmb0 attach returned 6
Starting dhclient.
panic: Assertion in_epoch(net_epoch_preempt) failed at /syzkaller/managers/main/kernel/sys/net/if.c:3694
cpuid = 1
time = 1570544152
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001a110850
vpanic() at vpanic+0x1e0/frame 0xfffffe001a1108b0
panic() at panic+0x43/frame 0xfffffe001a110910
if_delmulti_ifma_flags() at if_delmulti_ifma_flags+0x1af/frame 0xfffffe001a110950
inm_release_task() at inm_release_task+0x345/frame 0xfffffe001a1109c0
gtaskqueue_run_locked() at gtaskqueue_run_locked+0x13e/frame 0xfffffe001a110a20
gtaskqueue_thread_loop() at gtaskqueue_thread_loop+0xdd/frame 0xfffffe001a110a60
fork_exit() at fork_exit+0xb0/frame 0xfffffe001a110ab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe001a110ab0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 0 tid 100005 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why
db>