>Synopsis: The system randomly panics with the message: panic:
>config_detach: forced detach of iwm0 failed (45)
>Category: system
>Environment:
System : OpenBSD 6.9
Details : OpenBSD 6.9-current (GENERIC.MP) #69: Fri Jun 11 08:31:52
MDT 2021
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
Architecture: OpenBSD.amd64
Machine : amd64
>Description:
I upgraded from a 2021-06-11 snapshot to a 2021-07-22
snapshot and occasionally had the following crash. I
upgraded to several later snapshots hoping that a fix
might have already been committed, but still found the
same crashes up until an August 2nd (or so) snapshot.
panic: config_detach: forced detach of iwm0 failed (45)
The only two things that seemed to be in common were the
following:
(1) The system was heavily utilizing the wireless network
at the times of the crashes.
(2) The system (a laptop) was VERY warm when most of the
panics occurred. I don't know if this was a coincidence, a
hardware-based failsafe that throttled/detached the
wireless chip to reduce heat, or even a physical/thermal
expansion of the slot in which it's connected that may have
loosened contact with the pins. Again, it may be total
coincidence.
All but one of the panics totally hung the system, only
showing a panic message. I had to hold the power button
for 5 seconds to get the system to shut down. It was
non-responsive to everything else.
However, one of the panics dropped me into ddb where I was
able to get some information.
I have manually transcribed the following from photographs
of the panic screen. Please forgive any typos.
panic: config_detach: forced detach of iwm0 failed (45)
Stopped at db_enter+0x10: pop; %rbp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
433814 62962 0 0x14000 0x200 3 drmwq
*211960 92088 0 0x14000 0x200 2K systq
db_enter() at db_enter+0x10
panic(ffffffff81eeec45) at panic+0xbf
config_detach(ffff80000017d000,1) at config_detach+0x3c3
config_detach_children(ffff80000016e200,1) at config_detach_children+0x61
pci_detach_devices(ffff80000016e200,1) at pci_detach_devices+0x24
ppb_hotplug_remove(ffff80000017cc00) at ppb_hotplug_remove+0x32
taskq_thread(ffffffff82181750) at taskq_thread+0x81
end trace frame: 0x0, count: 8
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{2}> bt
db_enter() at db_enter+0x10
config_detach(ffff80000017d000,1) at config_detach+0x3c3
config_detach_children(ffff80000016e200,1) at config_detach_children+0x61
pci_detach_devices(ffff800000016e200,1) at pci_detach_devices+0x24
ppb_hotplug_remove(ffff8000000117cc00) at ppb_hotplug_remove+0x32
taskq_thread(ffffffff82181750) at taskq_thread+0x81
end trace frame: 0x0, count: -7
ddb{2}> show panic
*cpu2: config_detach: forced detach of iwm0 failed (45)
ddb{2}> ps
[many, many lines skipped]
*92088 211960 0 0 7 0x14200 systq
[end backtrace]
I am willing to test any patches and provide more information.
However, given the sporadic nature of the crashes, it may take a
few days to reproduce a crash, and even then they didn't always
allow for keyboard input at ddb.
>How-To-Repeat:
Unknown. The system has panicked after several days of
uptime, and also within minutes of a cold boot. However,
utilizing the wireless network heavily seems to greatly
increase the odds of the system panicking.
>Fix:
Unknown. Reverting to the June 11th 2021 snapshot fixed
the issue for me.
dmesg:
OpenBSD 6.9-current (GENERIC.MP) #69: Fri Jun 11 08:31:52 MDT 2021
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 16858365952 (16077MB)
avail mem = 16331960320 (15575MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.7 @ 0xbcc72000 (67 entries)
bios0: vendor LENOVO version "GLETA1WW (2.55 )" date 04/20/2020
bios0: LENOVO 20AWS27D00
acpi0 at bios0: ACPI 5.0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP SLIC DBGP ECDT HPET APIC MCFG SSDT SSDT SSDT SSDT SSDT
SSDT SSDT PCCT SSDT TCPA UEFI MSDM ASF! BATB FPDT UEFI DMAR
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) i7-4800MQ CPU @ 2.70GHz, 2694.13 MHz, 06-3c-03
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,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,TSC_ADJUST,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,SRBDS_CTRL,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN
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
cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz, 2693.78 MHz, 06-3c-03
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,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,TSC_ADJUST,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,SRBDS_CTRL,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN
cpu1: 256KB 64b/line 8-way L2 cache
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 4 (application processor)
cpu2: Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz, 2693.77 MHz, 06-3c-03
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,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,TSC_ADJUST,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,SRBDS_CTRL,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN
cpu2: 256KB 64b/line 8-way L2 cache
cpu2: smt 0, core 2, package 0
cpu3 at mainbus0: apid 6 (application processor)
cpu3: Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz, 2693.77 MHz, 06-3c-03
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,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,TSC_ADJUST,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,SRBDS_CTRL,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN
cpu3: 256KB 64b/line 8-way L2 cache
cpu3: smt 0, core 3, package 0
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins
acpimcfg0 at acpi0
acpimcfg0: 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)
acpibtn0 at acpi0: LID_
acpibtn1 at acpi0: SLPB
acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
acpicmos0 at acpi0
tpm0 at acpi0 TPM_ addr 0xfed40000/0x5000, device 0x0000104a rev 0x4e
acpibat0 at acpi0: BAT0 model "45N1161" serial 3584 type LION oem "LGC"
acpiac0 at acpi0: AC unit online
acpithinkpad0 at acpi0: version 1.0
"PNP0C14" at acpi0 not configured
"PNP0C14" at acpi0 not configured
"PNP0C14" at acpi0 not configured
"INT340F" at acpi0 not configured
acpicpu0 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpicpu1 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpicpu2 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpicpu3 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), 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
acpivideo0 at acpi0: VID_
acpivout0 at acpivideo0: LCD0
acpivideo1 at acpi0: VID_
cpu0: using VERW MDS workaround (except on vmm entry)
cpu0: Enhanced SpeedStep 2694 MHz: speeds: 2701, 2700, 2600, 2400, 2300, 2200,
2000, 1900, 1700, 1600, 1500, 1300, 1200, 1100, 900, 800 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Core 4G Host" rev 0x06
inteldrm0 at pci0 dev 2 function 0 "Intel HD Graphics 4600" rev 0x06
drm0 at inteldrm0
inteldrm0: msi, HASWELL, gen 7
azalia0 at pci0 dev 3 function 0 "Intel Core 4G HD Audio" rev 0x06: msi
azalia0: No codecs found
xhci0 at pci0 dev 20 function 0 "Intel 8 Series xHCI" rev 0x04: msi, xHCI 1.0
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "Intel xHCI root hub" rev 3.00/1.00
addr 1
"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
xx:xx:xx:xx:xx:xx
ehci0 at pci0 dev 26 function 0 "Intel 8 Series USB" rev 0x04: apic 2 int 16
usb1 at ehci0: USB revision 2.0
uhub1 at usb1 configuration 1 interface 0 "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: 4-bit, dma
ppb1 at pci0 dev 28 function 1 "Intel 8 Series PCIE" rev 0xd4: msi
pci2 at ppb1 bus 3
iwm0 at pci2 dev 0 function 0 "Intel AC 7260" rev 0x83, msi
ehci1 at pci0 dev 29 function 0 "Intel 8 Series USB" rev 0x04: apic 2 int 23
usb2 at ehci1: USB revision 2.0
uhub2 at usb2 configuration 1 interface 0 "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
ahci0: port 0: 6.0Gb/s
ahci0: port 1: 6.0Gb/s
ahci0: port 5: 1.5Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, Samsung SSD 860, RVT0> naa.5000000000000000
sd0: 953869MB, 512 bytes/sector, 1953525168 sectors, thin
sd1 at scsibus1 targ 1 lun 0: <ATA, NT-1TB, T180> naa.5000000000000000
sd1: 976762MB, 512 bytes/sector, 2000409264 sectors, thin
cd0 at scsibus1 targ 5 lun 0: <PLDS, DVD-RW DU8A5SH, BU51> removable
ichiic0 at pci0 dev 31 function 3 "Intel 8 Series SMBus" rev 0x04: apic 2 int 18
iic0 at ichiic0
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
wsmouse1 at pms0 mux 0
pms0: Synaptics clickpad, firmware 8.2, 0x1e2b1 0x943300 0x2fed40 0xf006a3
0x12e800
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: VMX/EPT
dt: 445 probes
uhidev0 at uhub0 port 6 configuration 1 interface 0 "Logitech USB Laser Mouse"
rev 2.00/56.01 addr 2
uhidev0: iclass 3/1
ums0 at uhidev0: 8 buttons, Z and W dir
wsmouse2 at ums0 mux 0
ugen0 at uhub0 port 7 "Validity Sensors VFS5011 Fingerprint Reader" rev
1.10/0.78 addr 3
uhub3 at uhub0 port 9 configuration 1 interface 0 "LENOVO Lenovo ThinkPad Dock"
rev 2.10/50.40 addr 4
uhub4 at uhub3 port 4 configuration 1 interface 0 "Lenovo Lenovo ThinkPad Dock"
rev 2.00/0.01 addr 5
ugen1 at uhub0 port 11 "Intel product 0x07dc" rev 2.00/0.01 addr 6
sdmmc0: can't enable card
uvideo0 at uhub0 port 12 configuration 1 interface 0 "SunplusIT INC. Integrated
Camera" rev 2.00/0.03 addr 7
video0 at uvideo0
uhub5 at uhub0 port 20 configuration 1 interface 0 "LENOVO Lenovo ThinkPad
Dock" rev 3.00/50.41 addr 8
uhub6 at uhub1 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev
2.00/0.04 addr 2
uhub7 at uhub2 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev
2.00/0.04 addr 2
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
sd2 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 006>
sd2: 926715MB, 512 bytes/sector, 1897913570 sectors
root on sd2a (820063e3b3244e77.a) swap on sd2b dump on sd2b
inteldrm0: 1920x1080, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation), using wskbd0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
iwm0: hw rev 0x140, fw ver 17.3216344376.0, address xx:xx:xx:xx:xx:xx
usbdevs:
Controller /dev/usb0:
addr 01: 8086:0000 Intel, xHCI root hub
super speed, self powered, config 1, rev 1.00
driver: uhub0
addr 02: 046d:c069 Logitech, USB Laser Mouse
low speed, power 98 mA, config 1, rev 56.01
driver: uhidev0
addr 03: 138a:0017 Validity Sensors, VFS5011 Fingerprint Reader
full speed, power 100 mA, config 1, rev 0.78, iSerial 7f178585b00e
driver: ugen0
addr 04: 17ef:1012 LENOVO, Lenovo ThinkPad Dock
super speed, self powered, config 1, rev 50.41
driver: uhub3
addr 05: 17ef:1012 LENOVO, Lenovo ThinkPad Dock
high speed, self powered, config 1, rev 50.40
driver: uhub4
addr 06: 8087:07dc Intel, product 0x07dc
full speed, self powered, config 1, rev 0.01
driver: ugen1
addr 07: 5986:0268 SunplusIT INC., Integrated Camera
high speed, power 500 mA, config 1, rev 0.03
driver: uvideo0
addr 08: 17ef:1011 Lenovo, Lenovo ThinkPad Dock
high speed, self powered, config 1, rev 0.01, iSerial Rev1.2
driver: uhub5
Controller /dev/usb1:
addr 01: 8086:0000 Intel, EHCI root hub
high speed, self powered, config 1, rev 1.00
driver: uhub1
addr 02: 8087:8008 Intel, Rate Matching Hub
high speed, self powered, config 1, rev 0.04
driver: uhub6
Controller /dev/usb2:
addr 01: 8086:0000 Intel, EHCI root hub
high speed, self powered, config 1, rev 1.00
driver: uhub2
addr 02: 8087:8000 Intel, Rate Matching Hub
high speed, self powered, config 1, rev 0.04
driver: uhub7
