Hi, After rebuilding kernel under i386, I experimented splassert.
Here is a shorten backtrace handwritten: splassert: sorwakeup: want 64 have 0 Starting stack trace... splassertfail(...) splassertfail(...) splassertcheck(...) sorwakeup(...) route_input(...) rt_ifmsg(...) ifioctl(...) sys_ioctl(...) syscall(...) --- syscall (number 959474688) --- (I could rewrite the complete version on request as I shoted pictures and it is reproductible easily). It occurs at boottime during network starting. My configuration is simple: $ cat /etc/hostname.bce0 dhcp rtsol The splassert is trigged during `rtsol' processing, as removing it makes the laptop to boot. Below the dmesg (while running without ipv6). -- Sebastien Marie OpenBSD 6.0-current (GENERIC.MP) #424: Thu Sep 22 15:29:57 CEST 2016 semarie@bert.local:/usr/src/sys/arch/i386/compile/GENERIC.MP cpu0: Genuine Intel(R) CPU T2400 @ 1.83GHz ("GenuineIntel" 686-class) 1.83 GHz cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,NXE,SSE3,MWAIT,VMX,EST,TM2,xTPR,PDCM,PERF,SENSOR real mem = 2137354240 (2038MB) avail mem = 2083823616 (1987MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: date 06/13/07, BIOS32 rev. 0 @ 0xffa10, SMBIOS rev. 2.4 @ 0xf7980 (44 entries) bios0: vendor Dell Inc. version "A17" date 06/13/2007 bios0: Dell Inc. MM061 acpi0 at bios0: rev 0 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP HPET APIC MCFG SLIC BOOT SSDT acpi0: wakeup devices LID_(S3) PBTN(S4) MBTN(S5) PCI0(S3) USB0(S0) USB1(S0) USB2(S0) USB3(S0) EHCI(S0) AZAL(S3) PCIE(S4) RP01(S4) RP02(S3) RP03(S3) RP04(S3) RP05(S3) [...] acpitimer0 at acpi0: 3579545 Hz, 24 bits acpihpet0 at acpi0: 14318179 Hz acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges cpu0: apic clock running at 166MHz cpu0: mwait min=64, max=64, C-substates=0.2.2.2.2, IBE cpu1 at mainbus0: apid 1 (application processor) cpu1: Genuine Intel(R) CPU T2400 @ 1.83GHz ("GenuineIntel" 686-class) 1.83 GHz cpu1: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,NXE,SSE3,MWAIT,VMX,EST,TM2,xTPR,PDCM,PERF,SENSOR ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins acpimcfg0 at acpi0 addr 0xf0000000, bus 0-63 acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus -1 (AGP_) acpiprt2 at acpi0: bus 3 (PCIE) acpiprt3 at acpi0: bus 11 (RP01) acpiprt4 at acpi0: bus -1 (RP02) acpiprt5 at acpi0: bus -1 (RP03) acpiprt6 at acpi0: bus 12 (RP04) acpiprt7 at acpi0: bus -1 (RP05) acpiprt8 at acpi0: bus -1 (RP06) acpicpu0 at acpi0: !C3(250@85 io@0x1015), !C2(500@1 io@0x1014), C1(1000@1 halt), PSS acpicpu1 at acpi0: !C3(250@85 io@0x1015), !C2(500@1 io@0x1014), C1(1000@1 halt), PSS acpitz0 at acpi0: critical temperature is 126 degC "*pnp0c14" at acpi0 not configured acpiac0 at acpi0: AC unit online acpibat0 at acpi0: BAT0 model " DELLUD2649" serial 878 type LION oem "Sanyo" acpibtn0 at acpi0: LID_ acpibtn1 at acpi0: PBTN acpibtn2 at acpi0: SBTN "PNP0C32" at acpi0 not configured "PNP0F13" at acpi0 not configured "PNP0303" at acpi0 not configured acpivideo0 at acpi0: VID_ acpivideo1 at acpi0: VID_ acpivout0 at acpivideo1: LCD_ acpivideo2 at acpi0: VID2 bios0: ROM list: 0xc0000/0xe800! 0xce800/0x1800 cpu0: Enhanced SpeedStep 1829 MHz: speeds: 1833, 1333, 1000 MHz pci0 at mainbus0 bus 0: configuration mode 1 (bios) pchb0 at pci0 dev 0 function 0 "Intel 82945GM Host" rev 0x03 inteldrm0 at pci0 dev 2 function 0 "Intel 82945GM Video" rev 0x03 drm0 at inteldrm0 intagp0 at inteldrm0 agp0 at intagp0: aperture at 0xd0000000, size 0x10000000 inteldrm0: apic 2 int 16 inteldrm0: 1280x800 wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation) wsdisplay0: screen 1-5 added (std, vt100 emulation) "Intel 82945GM Video" rev 0x03 at pci0 dev 2 function 1 not configured azalia0 at pci0 dev 27 function 0 "Intel 82801GB HD Audio" rev 0x01: msi azalia0: codecs: Sigmatel STAC9200, Conexant/0x2bfa, using Sigmatel STAC9200 audio0 at azalia0 ppb0 at pci0 dev 28 function 0 "Intel 82801GB PCIE" rev 0x01: apic 2 int 16 pci1 at ppb0 bus 11 wpi0 at pci1 dev 0 function 0 "Intel PRO/Wireless 3945ABG" rev 0x02: msi, MoW2, address 00:13:02:2e:8b:46 ppb1 at pci0 dev 28 function 3 "Intel 82801GB PCIE" rev 0x01: apic 2 int 19 pci2 at ppb1 bus 12 uhci0 at pci0 dev 29 function 0 "Intel 82801GB USB" rev 0x01: apic 2 int 20 uhci1 at pci0 dev 29 function 1 "Intel 82801GB USB" rev 0x01: apic 2 int 21 uhci2 at pci0 dev 29 function 2 "Intel 82801GB USB" rev 0x01: apic 2 int 22 uhci3 at pci0 dev 29 function 3 "Intel 82801GB USB" rev 0x01: apic 2 int 23 ehci0 at pci0 dev 29 function 7 "Intel 82801GB USB" rev 0x01: apic 2 int 20 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 ppb2 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0xe1 pci3 at ppb2 bus 3 bce0 at pci3 dev 0 function 0 "Broadcom BCM4401B1" rev 0x02: apic 2 int 17, address 00:15:c5:0b:8b:7a bmtphy0 at bce0 phy 1: BCM4401 10/100baseTX PHY, rev. 0 "Ricoh 5C832 Firewire" rev 0x00 at pci3 dev 1 function 0 not configured sdhc0 at pci3 dev 1 function 1 "Ricoh 5C822 SD/MMC" rev 0x19: apic 2 int 18 sdhc0: SDHC 1.0, 33 MHz base clock sdmmc0 at sdhc0: 4-bit, sd high-speed, mmc high-speed "Ricoh 5C843 MMC" rev 0x01 at pci3 dev 1 function 2 not configured "Ricoh 5C592 Memory Stick" rev 0x0a at pci3 dev 1 function 3 not configured "Ricoh 5C852 xD" rev 0x05 at pci3 dev 1 function 4 not configured ichpcib0 at pci0 dev 31 function 0 "Intel 82801GBM LPC" rev 0x01: PM disabled pciide0 at pci0 dev 31 function 2 "Intel 82801GBM SATA" rev 0x01: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility wd0 at pciide0 channel 0 drive 0: <ST96812AS> wd0: 16-sector PIO, LBA48, 57241MB, 117231408 sectors wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5 atapiscsi0 at pciide0 channel 1 drive 0 scsibus1 at atapiscsi0: 2 targets cd0 at scsibus1 targ 0 lun 0: <_NEC, DVD+-RW ND-6650A, 102C> ATAPI 5/cdrom removable cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2 ichiic0 at pci0 dev 31 function 3 "Intel 82801GB SMBus" rev 0x01: apic 2 int 17 iic0 at ichiic0 spdmem0 at iic0 addr 0x50: 1GB DDR2 SDRAM non-parity PC2-5300CL5 SO-DIMM spdmem1 at iic0 addr 0x52: 1GB DDR2 SDRAM non-parity PC2-5300CL5 SO-DIMM usb1 at uhci0: USB revision 1.0 uhub1 at usb1 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb2 at uhci1: USB revision 1.0 uhub2 at usb2 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb3 at uhci2: USB revision 1.0 uhub3 at usb3 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb4 at uhci3: USB revision 1.0 uhub4 at usb4 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 addr 1 isa0 at ichpcib0 isadma0 at isa0 pckbc0 at isa0 port 0x60/5 irq 1 irq 12 pckbd0 at pckbc0 (kbd slot) wskbd0 at pckbd0: console keyboard, using wsdisplay0 pms0 at pckbc0 (aux slot) wsmouse0 at pms0 mux 0 pms0: Synaptics touchpad, firmware 6.2 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets root on wd0a (3c4eae72daef4fa1.a) swap on wd0b dump on wd0b