On Tue, May 19, 2026 at 08:49:19PM +0200, [email protected] wrote: > 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). >
what failed here though? the outer VM or the inner one? its unclear from your description. > 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 >
