Kernel diagnostic assertion in sys/uvm/uvm_page.c line 144 fired
from a userspace page fault.
Running kernel is snapshot from today, but I have been able to replicate on
7.9-beta:
OpenBSD 7.9-current (GENERIC.MP) #492: Mon May 18 08:55:04 MDT 2026
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
The machine is a VMware Workstation guest, 4 vCPUs, vmm(4)
loaded with VMX/EPT. At the time of the panic vmd(8) was running a
single nested vmm guest ("tmpinstall", 1G memory).
Console output (handwritten from photographs of a ddb session):
panic: kernel diagnostic assertion "dupe == NULL" failed: \
file "/usr/src/sys/uvm/uvm_page.c", line 144
Stopped at db_enter+0x14: popq %rbp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*247156 69557 1000 0x100002 0 0 sleep
db_enter() at db_enter+0x14
panic(ffffffff826af38a) at panic+0xd5
__assert(ffffffff826ea68f,ffffffff8272f1c4,90,ffffffff82683b86) \
at __assert+0x29
uvm_pagealloc_pg(fffffd8110887780,fffffd843f4c1d98,32f332000,0) \
at uvm_pagealloc_pg+0x32d
uvm_pagealloc(fffffd843f4c1d98,32f332000,0,3) \
at uvm_pagealloc+0x10c
pmap_get_ptp(fffffd843f4c1d88,65e665fa000) at pmap_get_ptp+0x1c2
pmap_enter(fffffd843f4c1d88,65e665fa000,3c5767000,1,21) \
at pmap_enter+0x196
uvm_fault_upper(ffff800042287d78,ffff800042287db0, \
ffff800042287c70) at uvm_fault_upper+0x1e0
uvm_fault(fffffd83252a25c0,65e665fa000,0,1) at uvm_fault+0xce
upageflttrap(ffff800042287ef0,65e665fa000) at upageflttrap+0x6c
usertrap(ffff800042287ef0) at usertrap+0x28c
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7afb74091f40, count: 3
No carp, no pppoe, no wg, no special pf config on this box. Single
em(4) NIC, default base install + vmd(8) configured.
dmesg follows:
OpenBSD 7.9-current (GENERIC.MP) #492: Mon May 18 08:55:04 MDT 2026
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 17161912320 (16366MB)
avail mem = 16613740544 (15844MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.7 @ 0xe0010 (248 entries)
bios0: vendor Phoenix Technologies LTD version "6.00" date 03/24/2025
bios0: VMware, Inc. VMware Virtual Platform
acpi0 at bios0: ACPI 4.0
acpi0: sleep states S0 S1 S4 S5
acpi0: tables DSDT FACP BOOT APIC MCFG SRAT HPET WAET DMAR
acpi0: wakeup devices PCI0(S3) USB_(S1) P2P0(S3) S1F0(S3) S2F0(S3) PE40(S3)
S1F0(S3) PE50(S3) PE60(S3) PE70(S3) PE41(S3) PE42(S3) PE43(S3) PE44(S3)
PE45(S3) PE46(S3) [...]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM) 3 100U, 2496.06 MHz, 06-ba-03
cpu0: cpuid 1
edx=1f8bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SS,HTT>
ecx=f7fa3223<SSE3,PCLMUL,VMX,SSSE3,FMA3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,HV>
cpu0: cpuid 6 eax=4<ARAT>
cpu0: cpuid 7.0
ebx=219c27eb<FSGSBASE,TSC_ADJUST,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,RDSEED,ADX,SMAP,CLFLUSHOPT,CLWB,SHA>
ecx=9840078c<UMIP,PKU,PKS> edx=bc004410<MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD>
cpu0: cpuid a vers=5, gp=6, gpwidth=48, ff=3, ffwidth=48
cpu0: cpuid d.1 eax=f<XSAVEOPT,XSAVEC,XGETBV1,XSAVES>
cpu0: cpuid 80000001 edx=2c100800<NXE,PAGE1GB,RDTSCP,LONG>
ecx=121<LAHF,ABM,3DNOWP>
cpu0: cpuid 80000007 edx=100<ITSC>
cpu0: msr 10a=8002b<IBRS_ALL,SKIP_L1DFL,MDS_NO,RRSBA>
cpu0: 32KB 64b/line 8-way D-cache, 64KB 64b/line 8-way I-cache, 2MB 64b/line
16-way L2 cache, 10MB 64b/line 10-way L3 cache
cpu0: smt 0, core 0, package 0, type P
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 66MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Core(TM) 3 100U, 2496.05 MHz, 06-ba-03
cpu1: smt 0, core 1, package 0, type P
cpu2 at mainbus0: apid 2 (application processor)
cpu2: Intel(R) Core(TM) 3 100U, 2496.16 MHz, 06-ba-03
cpu2: smt 0, core 2, package 0, type P
cpu3 at mainbus0: apid 3 (application processor)
cpu3: Intel(R) Core(TM) 3 100U, 2496.09 MHz, 06-ba-03
cpu3: smt 0, core 3, package 0, type P
ioapic0 at mainbus0: apid 4 pa 0xfec00000, version 20, 24 pins
acpimcfg0 at acpi0
acpimcfg0: addr 0xf0000000, bus 0-127
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
acpicmos0 at acpi0
"PNP0303" at acpi0 not configured
"VMW0003" at acpi0 not configured
"PNP0A05" at acpi0 not configured
acpiac0 at acpi0: AC unit online
acpicpu0 at acpi0: C1(@1 halt!)
acpicpu1 at acpi0: C1(@1 halt!)
acpicpu2 at acpi0: C1(@1 halt!)
acpicpu3 at acpi0: C1(@1 halt!)
pvbus0 at mainbus0: VMware
vmt0 at pvbus0
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel 82443BX" rev 0x01
ppb0 at pci0 dev 1 function 0 "Intel 82443BX AGP" rev 0x01
pci1 at ppb0 bus 1
pcib0 at pci0 dev 7 function 0 "Intel 82371AB PIIX4 ISA" rev 0x08
pciide0 at pci0 dev 7 function 1 "Intel 82371AB IDE" rev 0x01: DMA, channel 0
configured to compatibility, channel 1 configured to compatibility
pciide0: channel 0 disabled (no drives)
atapiscsi0 at pciide0 channel 1 drive 0
scsibus1 at atapiscsi0: 2 targets
cd0 at scsibus1 targ 0 lun 0: <NECVMWar, VMware IDE CDR10, 1.00> removable
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2
piixpm0 at pci0 dev 7 function 3 "Intel 82371AB Power" rev 0x08: SMBus disabled
"VMware VMCI" rev 0x10 at pci0 dev 7 function 7 not configured
vga1 at pci0 dev 15 function 0 "VMware SVGA II" rev 0x00
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
ppb1 at pci0 dev 17 function 0 "VMware PCI" rev 0x02
pci2 at ppb1 bus 2
em0 at pci2 dev 0 function 0 "Intel 82545EM" rev 0x01: apic 4 int 18, address
00:0c:29:2a:27:69
eap0 at pci2 dev 1 function 0 "Ensoniq AudioPCI97" rev 0x02: apic 4 int 19
ac97: codec id 0x43525913 (Cirrus Logic CS4297A rev 3)
audio0 at eap0
midi0 at eap0: <AudioPCI MIDI UART>
ppb2 at pci0 dev 21 function 0 "VMware PCIE" rev 0x01: msi
pci3 at ppb2 bus 3
vmwpvs0 at pci3 dev 0 function 0 "VMware PVSCSI" rev 0x02: msi
scsibus2 at vmwpvs0: 65 targets
sd0 at scsibus2 targ 0 lun 0: <VMware,, VMware Virtual S, 1.0>
sd0: 61440MB, 512 bytes/sector, 125829120 sectors
sd1 at scsibus2 targ 1 lun 0: <VMware,, VMware Virtual S, 1.0>
sd1: 61440MB, 512 bytes/sector, 125829120 sectors
ppb3 at pci0 dev 21 function 1 "VMware PCIE" rev 0x01: msi
pci4 at ppb3 bus 4
ppb4 at pci0 dev 21 function 2 "VMware PCIE" rev 0x01: msi
pci5 at ppb4 bus 5
ppb5 at pci0 dev 21 function 3 "VMware PCIE" rev 0x01: msi
pci6 at ppb5 bus 6
ppb6 at pci0 dev 21 function 4 "VMware PCIE" rev 0x01: msi
pci7 at ppb6 bus 7
ppb7 at pci0 dev 21 function 5 "VMware PCIE" rev 0x01: msi
pci8 at ppb7 bus 8
ppb8 at pci0 dev 21 function 6 "VMware PCIE" rev 0x01: msi
pci9 at ppb8 bus 9
ppb9 at pci0 dev 21 function 7 "VMware PCIE" rev 0x01: msi
pci10 at ppb9 bus 10
ppb10 at pci0 dev 22 function 0 "VMware PCIE" rev 0x01: msi
pci11 at ppb10 bus 11
ppb11 at pci0 dev 22 function 1 "VMware PCIE" rev 0x01: msi
pci12 at ppb11 bus 12
ppb12 at pci0 dev 22 function 2 "VMware PCIE" rev 0x01: msi
pci13 at ppb12 bus 13
ppb13 at pci0 dev 22 function 3 "VMware PCIE" rev 0x01: msi
pci14 at ppb13 bus 14
ppb14 at pci0 dev 22 function 4 "VMware PCIE" rev 0x01: msi
pci15 at ppb14 bus 15
ppb15 at pci0 dev 22 function 5 "VMware PCIE" rev 0x01: msi
pci16 at ppb15 bus 16
ppb16 at pci0 dev 22 function 6 "VMware PCIE" rev 0x01: msi
pci17 at ppb16 bus 17
ppb17 at pci0 dev 22 function 7 "VMware PCIE" rev 0x01: msi
pci18 at ppb17 bus 18
ppb18 at pci0 dev 23 function 0 "VMware PCIE" rev 0x01: msi
pci19 at ppb18 bus 19
ppb19 at pci0 dev 23 function 1 "VMware PCIE" rev 0x01: msi
pci20 at ppb19 bus 20
ppb20 at pci0 dev 23 function 2 "VMware PCIE" rev 0x01: msi
pci21 at ppb20 bus 21
ppb21 at pci0 dev 23 function 3 "VMware PCIE" rev 0x01: msi
pci22 at ppb21 bus 22
ppb22 at pci0 dev 23 function 4 "VMware PCIE" rev 0x01: msi
pci23 at ppb22 bus 23
ppb23 at pci0 dev 23 function 5 "VMware PCIE" rev 0x01: msi
pci24 at ppb23 bus 24
ppb24 at pci0 dev 23 function 6 "VMware PCIE" rev 0x01: msi
pci25 at ppb24 bus 25
ppb25 at pci0 dev 23 function 7 "VMware PCIE" rev 0x01: msi
pci26 at ppb25 bus 26
ppb26 at pci0 dev 24 function 0 "VMware PCIE" rev 0x01: msi
pci27 at ppb26 bus 27
ppb27 at pci0 dev 24 function 1 "VMware PCIE" rev 0x01: msi
pci28 at ppb27 bus 28
ppb28 at pci0 dev 24 function 2 "VMware PCIE" rev 0x01: msi
pci29 at ppb28 bus 29
ppb29 at pci0 dev 24 function 3 "VMware PCIE" rev 0x01: msi
pci30 at ppb29 bus 30
ppb30 at pci0 dev 24 function 4 "VMware PCIE" rev 0x01: msi
pci31 at ppb30 bus 31
ppb31 at pci0 dev 24 function 5 "VMware PCIE" rev 0x01: msi
pci32 at ppb31 bus 32
ppb32 at pci0 dev 24 function 6 "VMware PCIE" rev 0x01: msi
pci33 at ppb32 bus 33
ppb33 at pci0 dev 24 function 7 "VMware PCIE" rev 0x01: msi
pci34 at ppb33 bus 34
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, using wsdisplay0
pms0 at pckbc0 (aux slot)
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: VMX/EPT
vscsi0 at root
scsibus3 at vscsi0: 256 targets
softraid0 at root
scsibus4 at softraid0: 256 targets
root on sd0a (bd2c0d7ac96dee1f.a) swap on sd0b dump on sd0b
WARNING: / was not properly unmounted
