Hi,
One of my firewalls, running 7.9-stable on a Proxmox Hypervisor with
vio(4) interfaces paniced this morning with with the following
backtace. Intestingly it paniced a 2nd time while rebooting, and then
it went in a panic loop. (It has ddb.panic=0 in /etc/sysctl.conf).
Full dmesg follows.
panic: kernel diagnostic assertion "refs > 1" failed: file
"/usr/src/sys/kern/kern_synch.c", line 920
Starting stack trace...
panic(ffffffff82675fb3) at panic+0x170
__assert(ffffffff826af393,ffffffff8263b110,398,ffffffff8267d9bc) at
__assert+0x29
refcnt_take(fffffd80440df980) at refcnt_take+0xa1
rtable_match(0,ffffffff82c216e0,ffffffff82c216fc) at rtable_match+0x1b0
route6_mpath(ffffffff82c216c8,fffffd809b89e036,fffffd809b89e026,0) at
route6_mpath+0x6f
ip6_forward(fffffd80bc351200,ffffffff82c216c8,2) at ip6_forward+0x2a5
ip6_input_if(ffff80002c64b368,ffff80002c64b374,29,0,ffff800000ed4800,ffffffff82c21698)
at ip6_input_if+0x87d
ipv6_input(ffff800000ed4800,fffffd80bc351200,ffffffff82c21698) at
ipv6_input+0x42
if_input_process(ffff80000012e058,ffff80002c64b428,0) at if_input_process+0x20a
ifiq_process(ffff80000012e490) at ifiq_process+0xa1
taskq_thread(ffff80000002c000) at taskq_thread+0x129
end trace frame: 0x0, count: 246
End of stack trace.
syncing disks...panic: pool_do_get: mbufpl: page empty
Starting stack trace...
panic(ffffffff8261d20f) at panic+0x170
pool_do_get(ffffffff82b0b878,2,ffff80002c64a614) at pool_do_get+0x338
pool_get(ffffffff82b0b878,2) at pool_get+0xc2
m_clget(0,2,1000) at m_clget+0xc9
vio_populate_rx_mbufs(ffff80000012e000,ffff80000012b4c0) at
vio_populate_rx_mbufs+0x16e
vio_rx_intr(ffff80000012e980) at vio_rx_intr+0xa8
vio_queue_intr(ffff80000012b4c0) at vio_queue_intr+0x4b
intr_handler(ffff80002c64a830,ffff80000008f080) at intr_handler+0xa4
Xintr_ioapic_edge0_untramp() at Xintr_ioapic_edge0_untramp+0x18f
_kernel_lock() at _kernel_lock+0xb2
scsi_iopool_run(ffff8000000e5048) at scsi_iopool_run+0x130
scsi_xsh_runqueue(ffff8000000ba000) at scsi_xsh_runqueue+0x1fe
scsi_xsh_add(ffff80000012c1a0) at scsi_xsh_add+0xa0
sdstrategy(fffffd807a807b30) at sdstrategy+0x158
spec_strategy(ffff80002c64aa58) at spec_strategy+0x33
VOP_STRATEGY(fffffd80a80ad370,fffffd807a807b30) at VOP_STRATEGY+0x50
ufs_strategy(ffff80002c64aad8) at ufs_strategy+0x11d
VOP_STRATEGY(fffffd80ac991dc0,fffffd807a807b30) at VOP_STRATEGY+0x50
bwrite(fffffd807a807b30) at bwrite+0x15a
VOP_BWRITE(fffffd807a807b30) at VOP_BWRITE+0x39
ffs_fsync(ffff80002c64abf8) at ffs_fsync+0xe7
VOP_FSYNC(fffffd80ac991dc0,fffffd8008ffdf08,2,ffff8000ffffecf8) at
VOP_FSYNC+0x5f
ffs_sync_vnode(fffffd80ac991dc0,ffff80002c64ad10) at ffs_sync_vnode+0x101
vfs_mount_foreach_vnode(ffff800000e7dc00,ffffffff817d1bb0,ffff80002c64ad10) at
vfs_mount_foreach_vnode+0x4a
ffs_sync(ffff800000e7dc00,2,0,fffffd8008ffdf08,ffff8000ffffecf8) at
ffs_sync+0xa4
sys_sync(ffff8000ffffecf8,0,0) at sys_sync+0xb8
vfs_syncwait(ffff8000ffffecf8,1) at vfs_syncwait+0x30
vfs_shutdown(ffff8000ffffecf8) at vfs_shutdown+0x6b
boot(100) at boot+0xa9
OpenBSD 7.9 (GENERIC.MP) #8: Fri Aug 21 13:32:14 MDT 2026
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 3204292608 (3055MB)
avail mem = 3079733248 (2937MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xf52f0 (9 entries)
bios0: vendor SeaBIOS version "rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org"
date 04/01/2014
bios0: QEMU Standard PC (i440FX + PIIX, 1996)
acpi0 at bios0: ACPI 1.0
acpi0: sleep states S5
acpi0: tables DSDT FACP APIC SSDT HPET WAET
acpi0: wakeup devices
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: QEMU Virtual CPU version 2.5+, 2893.60 MHz, 0f-6b-01
cpu0: cpuid 1
edx=178bfbfd<FPU,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT>
ecx=82b82201<SSE3,SSSE3,CX16,SSE4.1,SSE4.2,x2APIC,POPCNT,AES,HV>
cpu0: cpuid 80000001 edx=20100800<NXE,LONG> ecx=1<LAHF>
cpu0: MELTDOWN
cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 4MB 64b/line
16-way L2 cache, 16MB 64b/line 16-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 1000MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: QEMU Virtual CPU version 2.5+, 2893.57 MHz, 0f-6b-01
cpu1: smt 0, core 1, package 0, type P
cpu2 at mainbus0: apid 2 (application processor)
cpu2: QEMU Virtual CPU version 2.5+, 2893.42 MHz, 0f-6b-01
cpu2: smt 0, core 2, package 0, type P
cpu3 at mainbus0: apid 3 (application processor)
cpu3: QEMU Virtual CPU version 2.5+, 2893.53 MHz, 0f-6b-01
cpu3: smt 0, core 3, package 0, type P
ioapic0 at mainbus0: apid 0 pa 0xfec00000, version 11, 24 pins
acpihpet0 at acpi0: 100000000 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
"ACPI0006" at acpi0 not configured
acpipci0 at acpi0 PCI0
"PNP0A06" at acpi0 not configured
"PNP0A06" at acpi0 not configured
"PNP0A06" at acpi0 not configured
"QEMU0002" at acpi0 not configured
com1 at acpi0 COM2 addr 0x2f8/0x8 irq 3: ns16550a, 16 byte fifo
com0 at acpi0 COM1 addr 0x3f8/0x8 irq 4: ns16550a, 16 byte fifo
"PNP0303" at acpi0 not configured
"PNP0F13" at acpi0 not configured
acpicmos0 at acpi0
"ACPI0010" at acpi0 not configured
"QEMUVGID" at acpi0 not configured
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: KVM
pvclock0 at pvbus0
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel 82441FX" rev 0x02
pcib0 at pci0 dev 1 function 0 "Intel 82371SB ISA" rev 0x00
pciide0 at pci0 dev 1 function 1 "Intel 82371SB IDE" rev 0x00: DMA, channel 0
wired to compatibility, channel 1 wired to compatibility
atapiscsi0 at pciide0 channel 0 drive 0
scsibus1 at atapiscsi0: 2 targets
cd0 at scsibus1 targ 0 lun 0: <QEMU, QEMU DVD-ROM, 2.5+> removable
cd0(pciide0:0:0): using PIO mode 4, DMA mode 2
pciide0: channel 1 disabled (no drives)
uhci0 at pci0 dev 1 function 2 "Intel 82371SB USB" rev 0x01: apic 0 int 11
piixpm0 at pci0 dev 1 function 3 "Intel 82371AB Power" rev 0x03: apic 0 int 9
iic0 at piixpm0
vga1 at pci0 dev 2 function 0 "Bochs VGA" rev 0x02
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
virtio0 at pci0 dev 3 function 0 "Qumranet Virtio Memory Balloon" rev 0x00
viomb0 at virtio0
virtio0: msix shared
ppb0 at pci0 dev 5 function 0 "Red Hat Qemu PCI-PCI" rev 0x00
pci1 at ppb0 bus 1
virtio1 at pci1 dev 1 function 0 "Qumranet Virtio SCSI" rev 0x00
vioscsi0 at virtio1: qsize 256
virtio1: msix per-VQ
scsibus2 at vioscsi0: 255 targets
sd0 at scsibus2 targ 0 lun 0: <QEMU, QEMU HARDDISK, 2.5+>
sd0: 20480MB, 512 bytes/sector, 41943040 sectors, thin
virtio2 at pci0 dev 18 function 0 "Qumranet Virtio Network" rev 0x00
vio0 at virtio2: 4 queues, address 00:50:56:8a:38:c8, mtu 1500
virtio2: msix
virtio3 at pci0 dev 19 function 0 "Qumranet Virtio Network" rev 0x00
vio1 at virtio3: 1 queue, address 00:50:56:8a:9d:19, mtu 1500
virtio3: msix per-VQ
ppb1 at pci0 dev 30 function 0 "Red Hat Qemu PCI-PCI" rev 0x00
pci2 at ppb1 bus 2
ppb2 at pci0 dev 31 function 0 "Red Hat Qemu PCI-PCI" rev 0x00
pci3 at ppb2 bus 3
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
usb0 at uhci0: USB revision 1.0
uhub0 at usb0 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
uhidev0 at uhub0 port 1 configuration 1 interface 0 "QEMU QEMU USB Tablet" rev
2.00/0.00 addr 2
uhidev0: iclass 3/0
ums0 at uhidev0: 5 buttons, Z dir
wsmouse1 at ums0 mux 0
vscsi0 at root
scsibus3 at vscsi0: 256 targets
softraid0 at root
scsibus4 at softraid0: 256 targets
root on sd0a (6bbf02358b794257.a) swap on sd0b dump on sd0b
--
Matthieu Herrb
