On -current, running apachebench with a large number of concurrent requests is causing a protection fault.
eg. the command: ab -n 1000 -c 1000 http://my.host/ Reproduced on two different machines. CNR on 5.6-release. kernel: protection fault trap, code=0 Stopped at sys_socket+0x6a: orb $0x1,0(%rax) ddb{1}> trace sys_socket() at sys_socket+0x6a syscall() at syscall+0x297 --- syscall (number 97) --- end of kernel end trace frames: 0x182f8a7adde8, count: -2 0x182fbc0e1cba: ddb{1}> OpenBSD 5.6-current (GENERIC.MP) #623: Fri Nov 28 22:09:45 MST 2014 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 16835846144 (16055MB) avail mem = 16383827968 (15624MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.7 @ 0xacd3d000 (66 entries) bios0: vendor LENOVO version "GLET70WW (2.24 )" date 05/21/2014 bios0: LENOVO 20ANCTO1WW acpi0 at bios0: rev 2 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP DBGP ECDT HPET APIC MCFG SSDT SSDT SSDT SSDT SSDT SSDT SSDT PCCT SSDT TCPA UEFI MSDM ASF! BATB FPDT UEFI acpi0: wakeup devices LID_(S4) SLPB(S3) IGBE(S4) EXP2(S4) EXP3(S4) XHCI(S3) EHC1(S3) EHC2(S3) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpiec0 at acpi0 acpihpet0 at acpi0: 14318179 Hz acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz, 2494.60 MHz cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID cpu0: 256KB 64b/line 8-way L2 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges cpu0: apic clock running at 99MHz cpu1 at mainbus0: apid 1 (application processor) cpu1: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz, 2494.23 MHz cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID cpu1: 256KB 64b/line 8-way L2 cache cpu1: smt 1, core 0, package 0 cpu2 at mainbus0: apid 2 (application processor) cpu2: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz, 2494.23 MHz cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID cpu2: 256KB 64b/line 8-way L2 cache cpu2: smt 0, core 1, package 0 cpu3 at mainbus0: apid 3 (application processor) cpu3: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz, 2494.23 MHz cpu3: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID cpu3: 256KB 64b/line 8-way L2 cache cpu3: smt 1, core 1, package 0 cpu4 at mainbus0: apid 4 (application processor) cpu4: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz, 2494.23 MHz cpu4: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID cpu4: 256KB 64b/line 8-way L2 cache cpu4: smt 0, core 2, package 0 cpu5 at mainbus0: apid 5 (application processor) cpu5: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz, 2494.23 MHz cpu5: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID cpu5: 256KB 64b/line 8-way L2 cache cpu5: smt 1, core 2, package 0 cpu6 at mainbus0: apid 6 (application processor) cpu6: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz, 2494.23 MHz cpu6: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID cpu6: 256KB 64b/line 8-way L2 cache cpu6: smt 0, core 3, package 0 cpu7 at mainbus0: apid 7 (application processor) cpu7: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz, 2494.23 MHz cpu7: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID cpu7: 256KB 64b/line 8-way L2 cache cpu7: smt 1, core 3, package 0 ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins acpimcfg0 at acpi0 addr 0xf8000000, bus 0-63 acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus -1 (PEG0) acpiprt2 at acpi0: bus -1 (PEG_) acpiprt3 at acpi0: bus 2 (EXP1) acpiprt4 at acpi0: bus 3 (EXP2) acpiprt5 at acpi0: bus -1 (EXP3) acpiprt6 at acpi0: bus -1 (EXP6) acpicpu0 at acpi0: C1, PSS acpicpu1 at acpi0: C1, PSS acpicpu2 at acpi0: C1, PSS acpicpu3 at acpi0: C1, PSS acpicpu4 at acpi0: C1, PSS acpicpu5 at acpi0: C1, PSS acpicpu6 at acpi0: C1, PSS acpicpu7 at acpi0: C1, PSS acpipwrres0 at acpi0: PUBS, resource for XHCI, EHC1, EHC2 acpipwrres1 at acpi0: NVP3, resource for PEG_ acpipwrres2 at acpi0: NVP2, resource for PEG_ acpitz0 at acpi0: critical temperature is 200 degC acpibtn0 at acpi0: LID_ acpibtn1 at acpi0: SLPB acpibat0 at acpi0: BAT0 model "45N1769" serial 224 type LION oem "SANYO" acpiac0 at acpi0: AC unit online acpithinkpad0 at acpi0 cpu0: Enhanced SpeedStep 2494 MHz: speeds: 2501, 2500, 2400, 2300, 2100, 2000, 1900, 1800, 1600, 1500, 1400, 1300, 1200, 1000, 900, 800 MHz pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 vendor "Intel", unknown product 0x0c04 rev 0x06 vga1 at pci0 dev 2 function 0 "Intel HD Graphics 4600" rev 0x06 intagp at vga1 not configured inteldrm0 at vga1 drm0 at inteldrm0 drm: Memory usable by graphics device = 2048M error: [drm:pid0:i915_write32] *ERROR* Unknown unclaimed register before writing to 100000 error: [drm:pid0:intel_dp_set_link_train] *ERROR* Timed out waiting for DP idle patterns error: [drm:pid0:i915_write32] *ERROR* Unknown unclaimed register before writing to 64040 inteldrm0: 1920x1080 wsdisplay0 at vga1 mux 1: console (std, vt100 emulation) wsdisplay0: screen 1-5 added (std, vt100 emulation) azalia0 at pci0 dev 3 function 0 "Intel Core 4G HD Audio" rev 0x06: msi azalia0: No codecs found "Intel 8 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured em0 at pci0 dev 25 function 0 "Intel I217-LM" rev 0x04: msi, address 28:d2:44:90:04:6c ehci0 at pci0 dev 26 function 0 "Intel 8 Series USB" rev 0x04: apic 2 int 16 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 azalia1 at pci0 dev 27 function 0 "Intel 8 Series HD Audio" rev 0x04: msi azalia1: codecs: Realtek ALC292 audio0 at azalia1 ppb0 at pci0 dev 28 function 0 "Intel 8 Series PCIE" rev 0xd4: msi pci1 at ppb0 bus 2 rtsx0 at pci1 dev 0 function 0 "Realtek RTS5227 Card Reader" rev 0x01: msi sdmmc0 at rtsx0 ppb1 at pci0 dev 28 function 1 "Intel 8 Series PCIE" rev 0xd4: msi pci2 at ppb1 bus 3 "Intel Dual Band Wireless AC 7260" rev 0x83 at pci2 dev 0 function 0 not configured ehci1 at pci0 dev 29 function 0 "Intel 8 Series USB" rev 0x04: apic 2 int 23 usb1 at ehci1: USB revision 2.0 uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1 pcib0 at pci0 dev 31 function 0 "Intel QM87 LPC" rev 0x04 ahci0 at pci0 dev 31 function 2 "Intel 8 Series AHCI" rev 0x04: msi, AHCI 1.3 scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, Samsung SSD 840, EXT0> SCSI3 0/direct fixed naa.50025388a05d9efb sd0: 238475MB, 512 bytes/sector, 488397168 sectors, thin cd0 at scsibus1 targ 5 lun 0: <HL-DT-ST, DVDRAM GU90N, LU20> ATAPI 5/cdrom removable ichiic0 at pci0 dev 31 function 3 "Intel 8 Series SMBus" rev 0x04: apic 2 int 18 iic0 at ichiic0 spdmem0 at iic0 addr 0x50: 8GB DDR3 SDRAM PC3-12800 SO-DIMM spdmem1 at iic0 addr 0x51: 8GB DDR3 SDRAM PC3-12800 SO-DIMM isa0 at pcib0 isadma0 at isa0 pckbc0 at isa0 port 0x60/5 pckbdprobe: reset response 0x0 pms0 at pckbc0 (aux slot) pckbc0: using irq 12 for aux slot wsmouse0 at pms0 mux 0 wsmouse1 at pms0 mux 0 pms0: Synaptics clickpad, firmware 8.1 pckbd0 at pckbc0 (kbd slot) pckbc0: using irq 1 for kbd slot wskbd0 at pckbd0: console keyboard, using wsdisplay0 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 uhub2 at uhub0 port 1 "Intel Rate Matching Hub" rev 2.00/0.04 addr 2 urtwn0 at uhub2 port 2 "Realtek 802.11n WLAN Adapter" rev 2.00/2.00 addr 3 urtwn0: MAC/BB RTL8192CU, RF 6052 2T2R, address c4:a8:1d:f8:9d:e9 ugen0 at uhub2 port 5 "Intel product 0x07dc" rev 2.00/0.01 addr 4 sdmmc0: can't enable card uvideo0 at uhub2 port 6 configuration 1 interface 0 "SunplusIT INC. Integrated Camera" rev 2.00/26.03 addr 5 video0 at uvideo0 uhub3 at uhub1 port 1 "Intel Rate Matching Hub" rev 2.00/0.04 addr 2 uhidev0 at uhub3 port 3 configuration 1 interface 0 "Logitech USB Receiver" rev 2.00/12.00 addr 3 uhidev0: iclass 3/1 ukbd0 at uhidev0: 8 variable keys, 6 key codes wskbd1 at ukbd0 mux 1 wskbd1: connecting to wsdisplay0 uhidev1 at uhub3 port 3 configuration 1 interface 1 "Logitech USB Receiver" rev 2.00/12.00 addr 3 uhidev1: iclass 3/1, 8 report ids ums0 at uhidev1 reportid 2: 16 buttons, Z dir wsmouse2 at ums0 mux 0 uhid0 at uhidev1 reportid 3: input=4, output=0, feature=0 uhid1 at uhidev1 reportid 4: input=1, output=0, feature=0 uhid2 at uhidev1 reportid 8: input=1, output=0, feature=0 uhidev2 at uhub3 port 3 configuration 1 interface 2 "Logitech USB Receiver" rev 2.00/12.00 addr 3 uhidev2: iclass 3/0, 33 report ids uhid3 at uhidev2 reportid 16: input=6, output=6, feature=0 uhid4 at uhidev2 reportid 17: input=19, output=19, feature=0 uhid5 at uhidev2 reportid 32: input=14, output=14, feature=0 uhid6 at uhidev2 reportid 33: input=31, output=31, feature=0 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets softraid0: sd1 was not shutdown properly sd1 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 005> SCSI2 0/direct fixed sd1: 236417MB, 512 bytes/sector, 484182507 sectors root on sd1a (03350c60759467aa.a) swap on sd1b dump on sd1b WARNING: / was not properly unmounted -- Carlin
