>Synopsis: kernel panic when invoking ddb from another tty than ttyC0
>Category: kernel
>Environment:
System : OpenBSD 6.8
Details : OpenBSD 6.8 (GENERIC) #97: Sun Oct 4 18:00:46 MDT 2020
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC
Architecture: OpenBSD.amd64
Machine : amd64
>Description:
When I try to invoke ddb with Ctrl-Alt-Esc from another tty than ttyC0,
the kernel panics.
You will find panic message, traceback and ps output below.
If needed, I still have the crash dump.
>How-To-Repeat:
Enable ddb.console.
Go to any tty except ttyC0.
Enter Crtl-Alt-Esc.
>Fix:
N/A
errors before panic message:
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
splassert: assertwaitok: want 0 have 9
panic message:
panic: kernel diagnostic assertion "p->p_wchan == NULL" failed: file
"/usr/src/sys/kern/kern_sched.c", line 353
traceback:
Stopped at db_enter+0x10: popq %rbp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
db_enter() at db_enter+0x10
panic(ffffffff81ddb0f2) at panic+0x12a
__assert(ffffffff81e3fe94,ffffffff81dc952b,161,ffffffff81dc296e) at
__assert+0x2b
sched_chooseproc() at sched_chooseproc+0x101
mi_switch() at mi_switch+0x109
msleep(ffff8000001f7280,ffff8000001f7298,20,ffffffff81e06c00,0) at
msleep+0x101
taskq_next_work(ffff8000001f7280,ffff800022e46858) at taskq_next_work+0x61
taskq_thread(ffff8000001f7280) at taskq_thread+0x82
end trace frame: 0x0, count: 7
ps output:
ddb> PID TID PPID UID S FLAGS WAIT COMMAND
46716 222641 59719 0 3 0x1000b3 ttyin login_passwd
62320 332948 67717 1000 3 0x1000b0 poll ssh-agent
8898 218895 67717 1000 3 0x82 select tint2
63549 66422 67717 1000 3 0x82 nanosleep redshift
90460 262322 67717 1000 3 0x82 poll xcompmgr
67717 150947 41045 1000 3 0x100082 poll cwm
41045 177573 94871 1000 3 0x10008a pause sh
94871 276330 55185 0 3 0x100080 wait xenodm
39144 499998 80037 0 3 0x100080 netio Xorg
80037 386456 55185 35 3 0x92 poll Xorg
80037 462408 55185 35 3 0x4000092 poll Xorg
38954 305428 1 0 3 0x100083 ttyin getty
75488 428761 1 0 3 0x100083 ttyin getty
5109 349049 1 0 3 0x100083 ttyin getty
60876 3318 1 0 3 0x100083 ttyin getty
59719 521598 1 0 3 0x83 netio login
55185 191659 1 0 3 0x88 pause xenodm
26243 59952 1 0 3 0x100098 poll cron
5560 28593 1 0 3 0x80 kqread apmd
63659 502916 1 99 3 0x100090 poll sndiod
23271 107324 1 110 3 0x100090 poll sndiod
98469 32165 57416 95 3 0x100092 kqread smtpd
21012 225120 57416 103 3 0x100092 kqread smtpd
60831 405428 57416 95 3 0x100092 kqread smtpd
75376 197549 57416 95 3 0x100092 kqread smtpd
54403 119307 57416 95 3 0x100092 kqread smtpd
13460 9150 57416 95 3 0x100092 kqread smtpd
57416 468565 1 0 3 0x100080 kqread smtpd
89850 30114 1 0 3 0x100080 poll ntpd
7051 260526 81175 83 3 0x100092 poll ntpd
81175 348924 1 83 3 0x100092 poll ntpd
7581 421124 1 53 3 0x90 kqread unbound
54721 150640 12052 74 3 0x100092 bpf pflogd
12052 371337 1 0 3 0x80 netio pflogd
65117 334444 20904 73 3 0x100090 kqread syslogd
20904 387167 1 0 3 0x100082 netio syslogd
20616 204781 14397 115 3 0x100092 kqread slaacd
47806 135934 14397 115 3 0x100092 kqread slaacd
14397 157357 1 0 3 0x100080 kqread slaacd
50306 455059 0 0 3 0x14200 bored i915-userptr-acq
23119 433304 0 0 3 0x14200 bored i915_flip
79798 49595 0 0 3 0x14200 bored i915_modeset
81535 116161 0 0 3 0x14200 bored i915-dp
65323 57322 0 0 3 0x14200 bored i915
90264 143808 0 0 3 0x14200 bored smr
6645 288713 0 0 3 0x14200 pgzero zerothread
2859 403605 0 0 3 0x14200 aiodoned aiodoned
82486 330431 0 0 3 0x14200 syncer update
32653 328446 0 0 3 0x14200 cleaner cleaner
53574 267786 0 0 3 0x14200 reaper reaper
20504 227996 0 0 3 0x14200 pgdaemon pagedaemon
11930 315405 0 0 3 0x14200 bored crynlk
39309 492257 0 0 3 0x14200 bored crypto
10326 510000 0 0 3 0x14200 mmctsk sdmmc0
14222 39717 0 0 3 0x14200 bored iwxns
67636 385496 0 0 3 0x14200 usbtsk usbtask
45740 486117 0 0 3 0x14200 usbatsk usbatsk
54387 123202 0 0 3 0x14200 bored drmtskl
84701 298491 0 0 3 0x14200 bored drmlwq
58278 162282 0 0 3 0x14200 bored drmlwq
62754 137612 0 0 3 0x14200 bored drmlwq
8199 449641 0 0 3 0x14200 bored drmlwq
49549 65109 0 0 3 0x14200 bored drmubwq
79433 66166 0 0 3 0x14200 bored drmubwq
52520 82509 0 0 3 0x14200 bored drmubwq
23712 200288 0 0 3 0x14200 bored drmubwq
98636 13523 0 0 3 0x14200 bored drmhpwq
18095 449503 0 0 3 0x14200 bored drmhpwq
29772 187522 0 0 3 0x14200 bored drmhpwq
23830 53583 0 0 3 0x14200 bored drmhpwq
25799 337351 0 0 3 0x14200 bored drmwq
64472 77172 0 0 3 0x14200 bored drmwq
96098 312017 0 0 3 0x14200 bored drmwq
*18081 268381 0 0 3 0x14200 bored drmwq
68860 369856 0 0 3 0x40014200 acpi0 acpi0
69872 393429 0 0 3 0x14200 bored sensors
66928 499473 0 0 3 0x14200 bored softnet
89306 465307 0 0 3 0x14200 bored systqmp
47370 222396 0 0 3 0x14200 bored systq
62380 482781 0 0 3 0x40014200 bored softclock
90358 27321 0 0 2 0x40014200 wfct idle0
1 315226 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
dmesg:
OpenBSD 6.8 (GENERIC) #97: Sun Oct 4 18:00:46 MDT 2020
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC
real mem = 8384339968 (7995MB)
avail mem = 8115294208 (7739MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 3.2 @ 0x97265000 (56 entries)
bios0: vendor INSYDE Corp. version "1.07.05" date 10/24/2019
bios0: Notebook NJ50_70CU
acpi0 at bios0: ACPI 5.1
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP UEFI SSDT SSDT LPIT WSMT SSDT DBGP DBG2 SSDT
SSDT NHLT HPET APIC MCFG DMAR SSDT FPDT BGRT
acpi0: wakeup devices XHC_(S3) HDAS(S4) RP01(S3) PXSX(S4) RP02(S3)
PXSX(S4) RP03(S3) PXSX(S4) RP04(S3) PXSX(S4) RP05(S3) PXSX(S4) RP06(S3)
PXSX(S4) RP07(S3) PXSX(S4) [...]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpihpet0 at acpi0: 23999999 Hz
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM) i3-10110U CPU @ 2.10GHz, 15446.74 MHz, 06-8e-0c
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,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,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SRBDS_CTRL,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES
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 24MHz
cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4.1.1.1, IBE
cpu at mainbus0: not configured
cpu at mainbus0: not configured
cpu at mainbus0: not configured
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 120 pins
acpimcfg0 at acpi0
acpimcfg0: addr 0xe0000000, bus 0-255
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus -1 (RP01)
acpiprt2 at acpi0: bus -1 (RP02)
acpiprt3 at acpi0: bus -1 (RP03)
acpiprt4 at acpi0: bus -1 (RP04)
acpiprt5 at acpi0: bus -1 (RP05)
acpiprt6 at acpi0: bus -1 (RP06)
acpiprt7 at acpi0: bus -1 (RP07)
acpiprt8 at acpi0: bus -1 (RP08)
acpiprt9 at acpi0: bus 1 (RP09)
acpiprt10 at acpi0: bus 6 (RP10)
acpiprt11 at acpi0: bus -1 (RP11)
acpiprt12 at acpi0: bus -1 (RP12)
acpiprt13 at acpi0: bus -1 (RP13)
acpiprt14 at acpi0: bus -1 (RP14)
acpiprt15 at acpi0: bus -1 (RP15)
acpiprt16 at acpi0: bus -1 (RP16)
acpiprt17 at acpi0: bus -1 (RP17)
acpiprt18 at acpi0: bus -1 (RP18)
acpiprt19 at acpi0: bus -1 (RP19)
acpiprt20 at acpi0: bus -1 (RP20)
acpiprt21 at acpi0: bus -1 (RP21)
acpiprt22 at acpi0: bus -1 (RP22)
acpiprt23 at acpi0: bus -1 (RP23)
acpiprt24 at acpi0: bus -1 (RP24)
acpiec0 at acpi0
acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
acpicmos0 at acpi0
"SYNA1202" at acpi0 not configured
"ANX7411" at acpi0 not configured
"INT34BB" at acpi0 not configured
acpibtn0 at acpi0: PWRB
acpibtn1 at acpi0: SLPB
acpibtn2 at acpi0: LID0
acpiac0 at acpi0: AC unit online
acpibat0 at acpi0: BAT0 not present
"PNP0C14" at acpi0 not configured
acpihid0 at acpi0: HIDD
"CLV0001" at acpi0 not configured
"CLV0002" at acpi0 not configured
"PNP0C14" at acpi0 not configured
"PNP0C14" at acpi0 not configured
acpipwrres0 at acpi0: V0PR
acpipwrres1 at acpi0: V1PR
acpipwrres2 at acpi0: V2PR
acpipwrres3 at acpi0: WRST
acpicpu0 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33),
C1(1000@1 mwait.1), PSS
acpitz0 at acpi0: critical temperature is 120 degC
acpipwrres4 at acpi0: PIN_
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: DD1F
cpu0: Enhanced SpeedStep 15446 MHz: speeds: 2501, 2500, 2400, 2300,
2100, 2000, 1800, 1700, 1500, 1300, 1200, 1000, 800, 700, 600, 400 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 vendor "Intel", unknown product 0x9b71
rev 0x0c
inteldrm0 at pci0 dev 2 function 0 vendor "Intel", unknown product
0x9b41 rev 0x02
drm0 at inteldrm0
inteldrm0: msi, COFFEELAKE, gen 9
vendor "Intel", unknown product 0x02f9 (class DASP subclass
miscellaneous, rev 0x00) at pci0 dev 18 function 0 not configured
xhci0 at pci0 dev 20 function 0 vendor "Intel", unknown product 0x02ed
rev 0x00: msi, xHCI 1.10
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
vendor "Intel", unknown product 0x02ef (class memory subclass RAM, rev
0x00) at pci0 dev 20 function 2 not configured
iwx0 at pci0 dev 20 function 3 "Intel Wi-Fi 6 AX201" rev 0x00, msix
dwiic0 at pci0 dev 21 function 0 vendor "Intel", unknown product 0x02e8
rev 0x00: apic 2 int 16
iic0 at dwiic0
ihidev0 at iic0 addr 0x2c , can't establish interrupt (polling), vendor
0x6cb product 0xcd65, SYNA1202
ihidev0: 14 report ids
imt0 at ihidev0: touchpad, 5 contacts
wsmouse0 at imt0 mux 0
ims0 at ihidev0 reportid 2: 2 buttons
wsmouse1 at ims0 mux 0
hid at ihidev0 reportid 6 not configured
hid at ihidev0 reportid 7 not configured
hid at ihidev0 reportid 9 not configured
hid at ihidev0 reportid 10 not configured
hid at ihidev0 reportid 11 not configured
hid at ihidev0 reportid 12 not configured
hid at ihidev0 reportid 13 not configured
hid at ihidev0 reportid 14 not configured
dwiic1 at pci0 dev 21 function 1 vendor "Intel", unknown product 0x02e9
rev 0x00: apic 2 int 17
iic1 at dwiic1
"ANX7411" at iic1 addr 0x42 not configured
vendor "Intel", unknown product 0x02e0 (class communications subclass
miscellaneous, rev 0x00) at pci0 dev 22 function 0 not configured
ahci0 at pci0 dev 23 function 0 vendor "Intel", unknown product 0x02d3
rev 0x00: msi, AHCI 1.3.1
ahci0: port 0: 6.0Gb/s
ahci0: port 1: 1.5Gb/s
ahci0: port 2: 6.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, WDC WD5000LPCX-2, 01.0>
naa.50014ee65cfa28d2
sd0: 476940MB, 512 bytes/sector, 976773168 sectors
cd0 at scsibus1 targ 1 lun 0: <HL-DT-ST, DVDRAM GUD0N, 1.00> removable
sd1 at scsibus1 targ 2 lun 0: <ATA, LDLC F6+M.2 240, S090>
t10.ATA_LDLC_F6+M.2_240_03242220F0164_
sd1: 228936MB, 512 bytes/sector, 468862128 sectors, thin
ppb0 at pci0 dev 29 function 0 vendor "Intel", unknown product 0x02b0
rev 0xf0
pci1 at ppb0 bus 1
rtsx0 at pci1 dev 0 function 0 "Realtek RTL8411B Card Reader" rev 0x01: msi
sdmmc0 at rtsx0: 4-bit, dma
re0 at pci1 dev 0 function 1 "Realtek 8168" rev 0x12: RTL8411B (0x5c80),
msi, address 80:fa:5b:7a:21:9f
rgephy0 at re0 phy 7: RTL8251 PHY, rev. 0
ppb1 at pci0 dev 29 function 1 vendor "Intel", unknown product 0x02b1
rev 0xf0
pci2 at ppb1 bus 6
pcib0 at pci0 dev 31 function 0 vendor "Intel", unknown product 0x0284
rev 0x00
azalia0 at pci0 dev 31 function 3 vendor "Intel", unknown product 0x02c8
rev 0x00: msi
azalia0: codecs: Realtek/0x0293, Intel/0x280b, using Realtek/0x0293
audio0 at azalia0
vendor "Intel", unknown product 0x02a3 (class serial bus subclass SMBus,
rev 0x00) at pci0 dev 31 function 4 not configured
vendor "Intel", unknown product 0x02a4 (class serial bus unknown
subclass 0x80, rev 0x00) at pci0 dev 31 function 5 not configured
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
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: VMX/EPT
efifb at mainbus0 not configured
uvideo0 at uhub0 port 1 configuration 1 interface 0 "Sonix Technology
Co., Ltd. BisonCam,NB Pro" rev 2.00/6.01 addr 2
video0 at uvideo0
uhidev0 at uhub0 port 5 configuration 1 interface 0 "Cherry USB
keyboard" rev 2.00/1.03 addr 3
uhidev0: iclass 3/1
ukbd0 at uhidev0: 8 variable keys, 6 key codes
wskbd1 at ukbd0 mux 1
uhidev1 at uhub0 port 5 configuration 1 interface 1 "Cherry USB
keyboard" rev 2.00/1.03 addr 3
uhidev1: iclass 3/0, 5 report ids
uhid0 at uhidev1 reportid 2: input=1, output=0, feature=0
uhid1 at uhidev1 reportid 3: input=3, output=0, feature=0
uhid2 at uhidev1 reportid 5: input=0, output=0, feature=5
uhidev2 at uhub0 port 7 configuration 1 interface 0 "Logitech USB
Optical Mouse" rev 2.00/72.00 addr 4
uhidev2: iclass 3/1
ums0 at uhidev2: 3 buttons, Z dir
wsmouse2 at ums0 mux 0
ugen0 at uhub0 port 10 "Intel product 0x0026" rev 2.01/0.02 addr 5
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd1a (1109b61c9c14d27a.a) swap on sd1b dump on sd1b
WARNING: / was not properly unmounted
inteldrm0: 1920x1080, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation), using wskbd0
wskbd1: connecting to wsdisplay0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
iwx0: hw rev 0x350, fw ver 48.1335886879.0, address 7c:b2:7d:dd:ad:56
wsmouse2 detached
ums0 detached
uhidev2 detached
uhidev2 at uhub0 port 7 configuration 1 interface 0 "Logitech USB
Optical Mouse" rev 2.00/72.00 addr 4
uhidev2: iclass 3/1
ums0 at uhidev2: 3 buttons, Z dir
wsmouse2 at ums0 mux 0
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: 5986:9102 Sonix Technology Co., Ltd., BisonCam,NB Pro
high speed, power 500 mA, config 1, rev 6.01
driver: uvideo0
addr 03: 046a:b090 Cherry, USB keyboard
low speed, power 100 mA, config 1, rev 1.03
driver: uhidev0
driver: uhidev1
addr 04: 046d:c077 Logitech, USB Optical Mouse
low speed, power 100 mA, config 1, rev 72.00
driver: uhidev2
addr 05: 8087:0026 Intel, product 0x0026
full speed, self powered, config 1, rev 0.02
driver: ugen0
