Hi, This weekend I pulled out an X40T Thinkpad to route some packets. I plugged in a ure(4) adapter (Cable Matters USB 3.0 to Gigabit) for that purpose. However, after any reasonably large burst in traffic, the machine would panic.
There were two kinds of panics. The first happened many times. It printed the following line: panic: ehci_allow_std: curlen == 0 The computer hung there every time: nothing else was printed, and there was no ddb prompt. So unfortunately I have no other information. But it was quite easy to trigger. The other panic only happened once. panic: kernel diagnostic assertion "m->m_len >= ETHER_HDR_LEN" failed: file "/usr/src/sys/net/bpf.c" line 1446 Stopped at db_enter+0x10: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND 306986 2118 0 0x14000 0x200 1 drmwq db_enter() at db_enter+0x10 panic(ffffffffff81deb3ab) at panic+0x12a __assert(fffffffff81e51b5a, ffffffff81de8907,5ax,fffffffff81e83b22) at __assert+0x2b bpf_mtab_ether(ffff8000006b2000,fffffd80ae9d0c00,1) at bpf_mtap_ether+0xff ifiq_input(ffff8000006ff4c0,ffff800022521910) at ifiq_input+0xf1 ure_rxeof(fffffd813b8a6cc0,ffff8000006ff7a8,0) at ure_rxeof+0x237 usb_transfer_complete(fffffd813b8a6cc0) at usb_transfer_complete+0x1e4 ehci_softintr(ffff80000069f000) at ehci_softintr+0x195 softintr_dispatch(1) at softintr_dispatch+0xeb Xsoftnet() at Xsoftnet+0x1f acpicpu_idle() at acpicpu_idle+0x1ea sched_idle(ffffffff820e5ff0) at sched_idle+0x27e end trace frame: 0x0, count: 3 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> The ps output is too long to transcribe, but I put screenshots at https://roadrunner.page/tmp/ure2020/ OpenBSD 6.8 (GENERIC.MP) #2: Sat Dec 5 07:17:48 MST 2020 r...@syspatch-68-amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 4168814592 (3975MB) avail mem = 4027432960 (3840MB) random: good seed from bootblocks mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xe0010 (68 entries) bios0: vendor LENOVO version "7WET71WW (3.21 )" date 11/29/2012 bios0: LENOVO 7453AH3 acpi0 at bios0: ACPI 3.0 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP SSDT ECDT APIC MCFG HPET SLIC BOOT ASF! SSDT TCPA SSDT SSDT SSDT acpi0: wakeup devices LID_(S3) SLPB(S3) IGBE(S4) EXP0(S4) EXP1(S4) EXP2(S4) EXP3(S4) USB0(S3) USB3(S3) USB5(S3) EHC0(S3) EHC1(S3) HDEF(S4) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpiec0 at acpi0 acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Core(TM)2 Duo CPU L9400 @ 1.86GHz, 1862.30 MHz, 06-17-06 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,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,NXE,LONG,LAHF,PERF,SENSOR,MELTDOWN cpu0: 6MB 64b/line 16-way L2 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 7 var ranges, 88 fixed ranges cpu0: apic clock running at 265MHz cpu0: mwait min=64, max=64, C-substates=0.2.2.2.2.1.3, IBE cpu1 at mainbus0: apid 1 (application processor) cpu1: Intel(R) Core(TM)2 Duo CPU L9400 @ 1.86GHz, 1862.00 MHz, 06-17-06 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,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,NXE,LONG,LAHF,PERF,SENSOR,MELTDOWN cpu1: 6MB 64b/line 16-way L2 cache cpu1: smt 0, core 1, package 0 ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 24 pins, remapped acpimcfg0 at acpi0 acpimcfg0: addr 0xe0000000, bus 0-63 acpihpet0 at acpi0: 14318179 Hz acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus -1 (AGP_) acpiprt2 at acpi0: bus 2 (EXP0) acpiprt3 at acpi0: bus 3 (EXP1) acpiprt4 at acpi0: bus -1 (EXP2) acpiprt5 at acpi0: bus 5 (EXP3) acpibtn0 at acpi0: LID_ acpibtn1 at acpi0: SLPB acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001 acpicmos0 at acpi0 "WACF008" at acpi0 not configured tpm0 at acpi0 TPM_ addr 0xfed40000/0x5000, device 0x10208086 rev 0x6 acpibat0 at acpi0: BAT0 model "42T4658" serial 24837 type LION oem "SANYO" acpiac0 at acpi0: AC unit online acpithinkpad0 at acpi0: version 1.0 "PNP0C14" at acpi0 not configured acpicpu0 at acpi0: !C3(250@17 mwait.3@0x20), !C2(500@1 mwait.1@0x10), C1(1000@1 mwait.1), PSS acpicpu1 at acpi0: !C3(250@17 mwait.3@0x20), !C2(500@1 mwait.1@0x10), C1(1000@1 mwait.1), PSS acpipwrres0 at acpi0: PUBS, resource for USB0, USB3, USB5, EHC0, EHC1 acpitz0 at acpi0: critical temperature is 127 degC acpitz1 at acpi0: critical temperature is 105 degC acpidock0 at acpi0: GDCK not docked (0) acpivideo0 at acpi0: VID_ acpivout0 at acpivideo0: LCD0 acpivideo1 at acpi0: VID_ cpu0: Enhanced SpeedStep 1862 MHz: speeds: 1867, 1866, 1600, 800 MHz pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel GM45 Host" rev 0x07 inteldrm0 at pci0 dev 2 function 0 "Intel GM45 Video" rev 0x07 drm0 at inteldrm0 intagp0 at inteldrm0 agp0 at intagp0: aperture at 0xd0000000, size 0x10000000 inteldrm0: apic 1 int 16, GM45, gen 4 "Intel GM45 Video" rev 0x07 at pci0 dev 2 function 1 not configured "Intel GM45 HECI" rev 0x07 at pci0 dev 3 function 0 not configured puc0 at pci0 dev 3 function 3 "Intel GM45 KT" rev 0x07: ports: 16 com com4 at puc0 port 0 apic 1 int 17: ns16550a, 16 byte fifo com4: probed fifo depth: 15 bytes em0 at pci0 dev 25 function 0 "Intel ICH9 IGP M AMT" rev 0x03: msi, address 00:1f:16:18:a5:cb uhci0 at pci0 dev 26 function 0 "Intel 82801I USB" rev 0x03: apic 1 int 20 uhci1 at pci0 dev 26 function 1 "Intel 82801I USB" rev 0x03: apic 1 int 21 uhci2 at pci0 dev 26 function 2 "Intel 82801I USB" rev 0x03: apic 1 int 22 ehci0 at pci0 dev 26 function 7 "Intel 82801I USB" rev 0x03: apic 1 int 23 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 azalia0 at pci0 dev 27 function 0 "Intel 82801I HD Audio" rev 0x03: msi azalia0: codecs: Conexant CX20561 audio0 at azalia0 ppb0 at pci0 dev 28 function 0 "Intel 82801I PCIE" rev 0x03: msi pci1 at ppb0 bus 2 ppb1 at pci0 dev 28 function 1 "Intel 82801I PCIE" rev 0x03: msi pci2 at ppb1 bus 3 iwn0 at pci2 dev 0 function 0 "Intel WiFi Link 5100" rev 0x00: msi, MIMO 1T2R, MoW, address 00:22:fa:98:44:8a ppb2 at pci0 dev 28 function 3 "Intel 82801I PCIE" rev 0x03: msi pci3 at ppb2 bus 5 uhci3 at pci0 dev 29 function 0 "Intel 82801I USB" rev 0x03: apic 1 int 16 uhci4 at pci0 dev 29 function 1 "Intel 82801I USB" rev 0x03: apic 1 int 17 uhci5 at pci0 dev 29 function 2 "Intel 82801I USB" rev 0x03: apic 1 int 18 ehci1 at pci0 dev 29 function 7 "Intel 82801I USB" rev 0x03: apic 1 int 19 usb1 at ehci1: USB revision 2.0 uhub1 at usb1 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 ppb3 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0x93 pci4 at ppb3 bus 13 pcib0 at pci0 dev 31 function 0 "Intel 82801IEM LPC" rev 0x03 ahci0 at pci0 dev 31 function 2 "Intel 82801I AHCI" rev 0x03: msi, AHCI 1.2 ahci0: port 0: 3.0Gb/s scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, HITACHI HTS54501, PBBZ> naa.5000cca66bc951f2 sd0: 152627MB, 512 bytes/sector, 312581808 sectors ichiic0 at pci0 dev 31 function 3 "Intel 82801I SMBus" rev 0x03: apic 1 int 23 iic0 at ichiic0 usb2 at uhci0: USB revision 1.0 uhub2 at usb2 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb3 at uhci1: USB revision 1.0 uhub3 at usb3 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb4 at uhci2: USB revision 1.0 uhub4 at usb4 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb5 at uhci3: USB revision 1.0 uhub5 at usb5 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb6 at uhci4: USB revision 1.0 uhub6 at usb6 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb7 at uhci5: USB revision 1.0 uhub7 at usb7 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 addr 1 isa0 at pcib0 isadma0 at isa0 pckbc0 at isa0 port 0x60/5 irq 1 irq 12 pckbd0 at pckbc0 (kbd slot) wskbd0 at pckbd0: console keyboard pms0 at pckbc0 (aux slot) wsmouse0 at pms0 mux 0 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 aps0 at isa0 port 0x1600/31 vmm0 at mainbus0: VMX (using slow L1TF mitigation) ure0 at uhub1 port 2 configuration 1 interface 0 "CMI USB 10/100/1000 LAN" rev 2.10/30.00 addr 2 ure0: RTL8153 (0x5c30), address 70:88:6b:80:c1:3c rgephy0 at ure0 phy 0: RTL8251 PHY, rev. 0 uhub3: device problem, disabling port 1 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, 006> sd1: 152624MB, 512 bytes/sector, 312575168 sectors root on sd1a (7d38ab8be9ec1a0a.a) swap on sd1b dump on sd1b WARNING: / was not properly unmounted inteldrm0: 1280x800, 32bpp wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation), using wskbd0 wsdisplay0: screen 1-5 added (std, vt100 emulation)