Badly OCR'd and manually quickly corrected screen capture below (tesseract doesn't do _at all_ well with digits and the spleen font), originals at
https://junkpile.org/hv-panic-202401-1.png https://junkpile.org/hv-panic-202401-2.png https://junkpile.org/hv-panic-202401-3.png This is a VM running under hyper-v running 7.4+errata007 (i.e. it _does_ have the "A network buffer that had to be split at certain length could crash the kernel" fix). Running postfix, librenms (PHP etc calling snmp tools quite a lot), rrdcached. Nothing unusual happening at the time of crash. Uptime prior to this was 3 weeks 3 days after it was updated to 7.4. (Before that, uptime on 7.3 was 5 months +). The only slightly unusual thing about this install is that there are two hvn(4) virtual nics. hvs1: short read: 48 panic: rw_enter: netlock locking against myself Stopped at db_enter+0x14: popq %rbp TID PID UID —-PRFLAGS =~ PFLAGS CPU. COMMAND *388963 11506 755 0x2 0 0 snmpbulkualk 320140 61046 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x14 panic(ffffffff820ebaaa) at panic+0xc3 rw_enter(ffffffff824bd2d0,2) at rw_enter+0x252 hv_kvp(ffffffff8248d738) at hv_kvp+0x705 hv_event_intr(ffff80000008d000) at hv_event_intr+0x1ab hv_intr() at hv_intr+0x1a Xresume_hyperv_upcall() at Xresume_hyperv_upcall+0x27 Xspllower() at Xspllower+0x1d task_add (ffff800000036200,ffff8000001533c0) at task_add+0x83 if_enqueue_ifq(ffff800000153060,ffffffd80f6642900) at if_enqueue_ifq+0x6f ether_output(ffff800000153060,fffffffd80f6642900,fffffd80c8ef5c78,fffffd811e6414d8) at ether_output+0x82 if_output_tso(ffff800000153060,fff800025395d08,fffffd80c8ef5c78,fffffd811e6414d8,5dc) at if_output_tso+0xe1 ip_output(fffffd80f6642900,0,fffffd80c8ef5c68,0,0,fffffd80c8ef5bf0,1da98542b9d8f733) at ip_output+0x817 udp_output(fffffd80c8ef5bf0,fffffd80b468b400,fffffd80ac452c00,0) at udp_output+0x3be end trace frame: 0xffff800025395ee0, count: 0 https://www.openbsd.org/ddb.html describes the minimum info required in bug eports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> mach ddbcpu 1 Stopped at x86_ipi_db+0x16: leave x86_ipi_db(ffff80002250dff0) at xB6_ipi_db+Ox16 x86_ipi_handler() at x86_ipi_handler+0x80 Xresume_lapic_ipiQ) at Xresume_lapic_ipi+0x27 -kernel_lock() at _kernel_lock+0xc2 reaper (ffff80002473c008) at reaper+0x133 end trace frame: 0x0, count: 10 ddb{1}> mach ddbepu 2 Invalid cpu 2 Oh, the output side of DDB messages are in the dmesg after boot too: OpenBSD 7.4 (GENERIC.MP) #0: Sun Oct 22 12:13:42 MDT 2023 r...@syspatch-74-amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 6064898048 (5783MB) avail mem = 5861367808 (5589MB) random: good seed from bootblocks mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.3 @ 0xf8ec0 (216 entries) bios0: vendor American Megatrends Inc. version "090006" date 04/28/2016 bios0: Microsoft Corporation Virtual Machine acpi0 at bios0: ACPI 2.0 acpi0: sleep states S0 S5 acpi0: tables DSDT FACP WAET SLIC OEM0 SRAT APIC OEMB acpi0: wakeup devices acpitimer0 at acpi0: 3579545 Hz, 32 bits acpihve0 at acpi0 acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Xeon(R) Gold 6134 CPU @ 3.20GHz, 3192.55 MHz, 06-55-04 cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SS,HTT,SSE3,PCLMUL,SSSE3,FMA3,CX16,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,HV,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,AVX512F,AVX512DQ,RDSEED,ADX,SMAP,CLFLUSHOPT,AVX512CD,AVX512BW,AVX512VL,IBRS,IBPB,STIBP,L1DF,SSBD,XSAVEOPT,XSAVEC,XSAVES,MELTDOWN cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 1MB 64b/line 16-way L2 cache, 24MB 64b/line 11-way L3 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges cpu0: apic clock running at 200MHz cpu1 at mainbus0: apid 1 (application processor) cpu1: Intel(R) Xeon(R) Gold 6134 CPU @ 3.20GHz, 3192.56 MHz, 06-55-04 cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SS,HTT,SSE3,PCLMUL,SSSE3,FMA3,CX16,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,HV,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,AVX512F,AVX512DQ,RDSEED,ADX,SMAP,CLFLUSHOPT,AVX512CD,AVX512BW,AVX512VL,IBRS,IBPB,STIBP,L1DF,SSBD,XSAVEOPT,XSAVEC,XSAVES,MELTDOWN cpu1: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 1MB 64b/line 16-way L2 cache, 24MB 64b/line 11-way L3 cache cpu1: smt 0, core 1, package 0 ioapic0 at mainbus0: apid 0 pa 0xfec00000, version 11, 24 pins, remapped acpiprt0 at acpi0: bus 0 (PCI0) acpipci0 at acpi0 PCI0 acpicmos0 at acpi0 com0 at acpi0 UAR1 addr 0x3f8/0x8 irq 4: ns16550a, 16 byte fifo com1 at acpi0 UAR2 addr 0x2f8/0x8 irq 3: ns16550a, 16 byte fifo "VMBus" at acpi0 not configured "Hyper_V_Gen_Counter_V1" at acpi0 not configured acpicpu0 at acpi0: C1(@1 halt!) acpicpu1 at acpi0: C1(@1 halt!) cpu0: using Skylake AVX MDS workaround pvbus0 at mainbus0: Hyper-V 10.0 hyperv0 at pvbus0: protocol 4.0, features 0x2e7f hyperv0: heartbeat, kvp, shutdown, timesync hvs0 at hyperv0 channel 2: ide, protocol 6.2 scsibus1 at hvs0: 2 targets sd0 at scsibus1 targ 0 lun 0: <Msft, Virtual Disk, 1.0> naa.600224800b919623720feccbf775f95d sd0: 49152MB, 512 bytes/sector, 100663296 sectors, thin hvs1 at hyperv0 channel 15: scsi, protocol 6.2 scsibus2 at hvs1: 2 targets hvn0 at hyperv0 channel 14: NVS 5.0 NDIS 6.30, address 00:15:5d:0a:8e:18 hvn1 at hyperv0 channel 16: NVS 5.0 NDIS 6.30, address 00:15:5d:0a:8e:1e pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel 82443BX" rev 0x03 pcib0 at pci0 dev 7 function 0 "Intel 82371AB PIIX4 ISA" rev 0x01 pciide0 at pci0 dev 7 function 1 "Intel 82371AB IDE" rev 0x01: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility pciide0: channel 0 disabled (no drives) atapiscsi0 at pciide0 channel 1 drive 0 scsibus3 at atapiscsi0: 2 targets cd0 at scsibus3 targ 0 lun 0: <Msft, Virtual CD/ROM, 1.0> removable cd0(pciide0:1:0): using PIO mode 4, DMA mode 2 piixpm0 at pci0 dev 7 function 3 "Intel 82371AB Power" rev 0x02: SMBus disabled vga1 at pci0 dev 8 function 0 "Microsoft VGA" rev 0x00 wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) isa0 at pcib0 isadma0 at isa0 fdc0 at isa0 port 0x3f0/6 irq 6 drq 2 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 vscsi0 at root scsibus4 at vscsi0: 256 targets softraid0 at root scsibus5 at softraid0: 256 targets root on sd0a (09f64bfb3a8cd88a.a) swap on sd0b dump on sd0b fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec fd1 at fdc0 drive 1: density unknown acpi0: PM1 stuck (en 0x101 st 0x1), clearing hyperv0: revoking channel 7 hvs1: short read: 48 panic: rw_enter: netlock locking against myself Stopped at db_enter+0x14: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND *388963 11506 755 0x2 0 0 snmpbulkwalk 320140 61046 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x14 panic(ffffffff820ebaaa) at panic+0xc3 rw_enter(ffffffff824bd2d0,2) at rw_enter+0x252 hv_kvp(ffffffff8248d738) at hv_kvp+0x705 hv_event_intr(ffff80000008d000) at hv_event_intr+0x1ab hv_intr() at hv_intr+0x1a Xresume_hyperv_upcall() at Xresume_hyperv_upcall+0x27 Xspllower() at Xspllower+0x1d task_add(ffff800000036200,ffff8000001533c0) at task_add+0x83 if_enqueue_ifq(ffff800000153060,fffffd80f6642900) at if_enqueue_ifq+0x6f ether_output(ffff800000153060,fffffd80f6642900,fffffd80c8ef5c78,fffffd811e6414d8) at ether_output+0x82 if_output_tso(ffff800000153060,ffff800025395d08,fffffd80c8ef5c78,fffffd811e6414d8,5dc) at if_output_tso+0xe1 ip_output(fffffd80f6642900,0,fffffd80c8ef5c68,0,0,fffffd80c8ef5bf0,1da98542b9d8f733) at ip_output+0x817 udp_output(fffffd80c8ef5bf0,fffffd80b468b400,fffffd80ac452c00,0) at udp_output+0x3be end trace frame: 0xffff800025395ee0, count: 0 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}> Stopped at x86_ipi_db+0x16: leave x86_ipi_db(ffff80002250dff0) at x86_ipi_db+0x16 x86_ipi_handler() at x86_ipi_handler+0x80 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 _kernel_lock() at _kernel_lock+0xc2 reaper(ffff80002473c008) at reaper+0x133 end trace frame: 0x0, count: 10 ddb{1}> Invalid cpu 2 ddb{1}> rebooting...
