Hi,

On Mon, Jun 06, 2016 at 07:16:20PM +0200, Martin Pieuchot wrote:
> [...]
> +     if (rt->rt_gateway->sa_family != AF_LINK) {
> +             printf("%s: something odd happens\n", __func__);
> +             m_freem(m);
> +             return (EINVAL);
> +     }
> [...]

I noticed that since a week or two ago, this printfs gets triggered on
my laptops and relatively quickly floods my dmesg. One is running a
snapshot from two weeks ago, the other one runs a snapshot from about a
month ago. On both, I have IPv6 routes that look like this:

Routing tables

Internet6:
Destination                        Gateway                        Flags   Refs  
    Use   Mtu  Prio Iface
default                            fe80::203:2dff:fe20:cf85%trunk0 UG         0 
      22     -    56 trunk0
::/96                              ::1                            UGRS       0  
      0 32768     8 lo0  
::/104                             ::1                            UGRS       0  
      0 32768     8 lo0  
::1                                ::1                            UHhl      14  
   9118 32768     1 lo0  
::127.0.0.0/104                    ::1                            UGRS       0  
      0 32768     8 lo0  
::224.0.0.0/100                    ::1                            UGRS       0  
      0 32768     8 lo0  
::255.0.0.0/104                    ::1                            UGRS       0  
      0 32768     8 lo0  
::ffff:0.0.0.0/96                  ::1                            UGRS       0  
      0 32768     8 lo0  
2001:470:7193:10::/64              2001:470:7193:10:82fa:5bff:fe33:76b3 UCn     
   2       19     -     4 trunk0
2001:470:7193:10::1                00:03:2d:20:cf:85              UHLc       0  
   7682     -     4 trunk0
2001:470:7193:10:187d:de60:2580:663b link#7                         UHLc       
0       19     -     4 trunk0
2001:470:7193:10:82fa:5bff:fe33:76b3 80:fa:5b:33:76:b3              UHLl       
0      819     -     1 trunk0
2001:470:7193:10:f093:17b2:7503:d4cf 80:fa:5b:33:76:b3              UHLl       
0      133     -     1 trunk0
2001:470:74bb::/64                 2001:470:74bb::1               UCn        0  
      0     -     4 tap0 
2001:470:74bb::1                   fe:e1:ba:d0:35:0a              UHLl       0  
      0     -     1 tap0 
2002::/24                          ::1                            UGRS       0  
      0 32768     8 lo0  
2002:7f00::/24                     ::1                            UGRS       0  
      0 32768     8 lo0  
2002:e000::/20                     ::1                            UGRS       0  
      0 32768     8 lo0  
2002:ff00::/24                     ::1                            UGRS       0  
      0 32768     8 lo0  
fd97:1c82:9447::/64                fd97:1c82:9447::1              UCn        1  
      0     -     4 tap0 
fd97:1c82:9447::                   fd97:1c82:9447::               UHLc       0  
   7408     -     4 tap0 
fd97:1c82:9447::1                  fe:e1:ba:d0:35:0a              UHLl       0  
      4     -     1 tap0 
fe80::/10                          ::1                            UGRS       0  
      2 32768     8 lo0  
fec0::/10                          ::1                            UGRS       0  
      0 32768     8 lo0  
fe80::1%lo0                        fe80::1%lo0                    UHl        0  
      0 32768     1 lo0  
fe80::%tap0/64                     fe80::fce1:baff:fed0:350a%tap0 UCn        0  
      0     -     4 tap0 
fe80::fce1:baff:fed0:350a%tap0     fe:e1:ba:d0:35:0a              UHLl       0  
      0     -     1 tap0 
fe80::%trunk0/64                   fe80::82fa:5bff:fe33:76b3%trunk0 UCn        
1        3     -     4 trunk0
fe80::203:2dff:fe20:cf85%trunk0    00:03:2d:20:cf:85              UHLch      1  
 436623     -     4 trunk0
fe80::82fa:5bff:fe33:76b3%trunk0   80:fa:5b:33:76:b3              UHLl       0  
 130445     -     1 trunk0
ff01::/16                          ::1                            UGRS       2  
      4 32768     8 lo0  
ff01::%lo0/32                      ::1                            Um         0  
      1 32768     4 lo0  
ff01::%tap0/32                     fe80::fce1:baff:fed0:350a%tap0 Um         0  
      2     -     4 tap0 
ff01::%trunk0/32                   fe80::82fa:5bff:fe33:76b3%trunk0 Um         
0        8     -     4 trunk0
ff02::/16                          ::1                            UGRS       2  
      4 32768     8 lo0  
ff02::%lo0/32                      ::1                            Um         0  
      1 32768     4 lo0  
ff02::%tap0/32                     fe80::fce1:baff:fed0:350a%tap0 Um         0  
      2     -     4 tap0 
ff02::%trunk0/32                   fe80::82fa:5bff:fe33:76b3%trunk0 Um         
1        9     -     4 trunk0

tap0 is managed and configured by a tinc daemon. I do have a BGP daemon
running on both laptops that adds routes that go over tap0, but at the
moment the only active sessions are IPv4.

How can I go about finding out what's the cause of this?

Dmesg of the laptop running the two weeks old snapshot follows after the
signature line.

-- 
        Gregor


OpenBSD 6.0-current (GENERIC.MP) #5: Sun Oct 23 23:31:34 CEST 2016
    r...@sputnik.unobtanium.de:/usr/obj/sys/arch/amd64/compile/GENERIC.MP
real mem = 17078013952 (16286MB)
avail mem = 16555896832 (15788MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 3.0 @ 0x87ee7000 (44 entries)
bios0: vendor American Megatrends Inc. version "5.11" date 08/29/2016
bios0: Notebook N24_25JU
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP APIC FPDT FIDT MCFG HPET SSDT SSDT DBGP DBG2 SSDT UEFI 
SSDT BGRT DMAR ASF!
acpi0: wakeup devices PEGP(S4) PEG0(S4) PEGP(S4) PEG1(S4) PEGP(S4) PEG2(S4) 
PXSX(S4) RP17(S4) PXSX(S4) RP18(S4) PXSX(S4) RP19(S4) PXSX(S4) RP20(S4) 
PXSX(S4) RP01(S4) [...]
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) i5-6200U CPU @ 2.30GHz, 2694.53 MHz
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,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT
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
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz, 2693.76 MHz
cpu1: 
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,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT
cpu1: 256KB 64b/line 8-way L2 cache
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 1 (application processor)
cpu2: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz, 2693.76 MHz
cpu2: 
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,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT
cpu2: 256KB 64b/line 8-way L2 cache
cpu2: smt 1, core 0, package 0
cpu3 at mainbus0: apid 3 (application processor)
cpu3: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz, 2693.76 MHz
cpu3: 
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,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT
cpu3: 256KB 64b/line 8-way L2 cache
cpu3: smt 1, core 1, package 0
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 120 pins
acpimcfg0 at acpi0 addr 0xe0000000, bus 0-255
acpihpet0 at acpi0: 23999999 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus -1 (PEG0)
acpiprt2 at acpi0: bus -1 (PEG1)
acpiprt3 at acpi0: bus -1 (PEG2)
acpiprt4 at acpi0: bus -1 (RP17)
acpiprt5 at acpi0: bus -1 (RP18)
acpiprt6 at acpi0: bus -1 (RP19)
acpiprt7 at acpi0: bus -1 (RP20)
acpiprt8 at acpi0: bus 1 (RP01)
acpiprt9 at acpi0: bus 2 (RP02)
acpiprt10 at acpi0: bus -1 (RP03)
acpiprt11 at acpi0: bus -1 (RP04)
acpiprt12 at acpi0: bus -1 (RP05)
acpiprt13 at acpi0: bus -1 (RP06)
acpiprt14 at acpi0: bus -1 (RP07)
acpiprt15 at acpi0: bus -1 (RP08)
acpiprt16 at acpi0: bus -1 (RP09)
acpiprt17 at acpi0: bus -1 (RP10)
acpiprt18 at acpi0: bus -1 (RP11)
acpiprt19 at acpi0: bus -1 (RP12)
acpiprt20 at acpi0: bus -1 (RP13)
acpiprt21 at acpi0: bus -1 (RP14)
acpiprt22 at acpi0: bus -1 (RP15)
acpiprt23 at acpi0: bus -1 (RP16)
acpiec0 at acpi0
acpicpu0 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), 
C1(1000@1 mwait.1), PSS
acpicpu1 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), 
C1(1000@1 mwait.1), PSS
acpicpu2 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), 
C1(1000@1 mwait.1), PSS
acpicpu3 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), 
C1(1000@1 mwait.1), PSS
acpipwrres0 at acpi0: PG00, resource for PEG0
acpipwrres1 at acpi0: PG01, resource for PEG1
acpipwrres2 at acpi0: PG02, resource for PEG2
acpitz0 at acpi0: critical temperature is 120 degC
"INT3F0D" at acpi0 not configured
"MSFT0001" at acpi0 not configured
"SYN1218" at acpi0 not configured
"INT33A1" at acpi0 not configured
"PNPC000" 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 model "BAT" serial 0001 type LION oem "Notebook"
"PNP0C14" at acpi0 not configured
"INT340E" at acpi0 not configured
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: DD1F
cpu0: Enhanced SpeedStep 2694 MHz: speeds: 2301, 2300, 2200, 2100, 2000, 1800, 
1700, 1500, 1400, 1300, 1100, 1000, 800, 700, 500, 400 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Core 6G Host" rev 0x08
"Intel HD Graphics 520" rev 0x07 at pci0 dev 2 function 0 not configured
xhci0 at pci0 dev 20 function 0 "Intel 100 Series xHCI" rev 0x21: msi
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
"Intel 100 Series MEI" rev 0x21 at pci0 dev 22 function 0 not configured
ahci0 at pci0 dev 23 function 0 "Intel 100 Series AHCI" rev 0x21: msi, AHCI 
1.3.1
ahci0: port 0: 6.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, CT240BX200SSD1, MU02> SCSI3 0/direct fixed 
naa.500a0751f01c9d7a
sd0: 228936MB, 512 bytes/sector, 468862128 sectors, thin
ppb0 at pci0 dev 28 function 0 "Intel 100 Series PCIE" rev 0xf1: msi
pci1 at ppb0 bus 1
rtsx0 at pci1 dev 0 function 0 "Realtek RTL8411B Card Reader" rev 0x01: msi
sdmmc0 at rtsx0: 4-bit
re0 at pci1 dev 0 function 1 "Realtek 8168" rev 0x12: RTL8411B (0x5c80), msi, 
address 80:fa:5b:33:76:b3
rgephy0 at re0 phy 7: RTL8251 PHY, rev. 0
ppb1 at pci0 dev 28 function 1 "Intel 100 Series PCIE" rev 0xf1: msi
pci2 at ppb1 bus 2
iwm0 at pci2 dev 0 function 0 "Intel Dual Band Wireless AC 8260" rev 0x3a, msi
pcib0 at pci0 dev 31 function 0 "Intel 100 Series LPC" rev 0x21
"Intel 100 Series PMC" rev 0x21 at pci0 dev 31 function 2 not configured
azalia0 at pci0 dev 31 function 3 "Intel 100 Series HD Audio" rev 0x21: msi
azalia0: codecs: Realtek ALC269, Intel/0x2809, using Realtek ALC269
audio0 at azalia0
ichiic0 at pci0 dev 31 function 4 "Intel 100 Series SMBus" rev 0x21: apic 2 int 
16
iic0 at ichiic0
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
pms0 at pckbc0 (aux slot)
wsmouse0 at pms0 mux 0
pms0: Synaptics touchpad, firmware 8.2
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: VMX/EPT
efifb0 at mainbus0: 1920x1080, 32bpp
wsdisplay0 at efifb0 mux 1: console (std, vt100 emulation), using wskbd0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
ugen0 at uhub0 port 5 "Intel product 0x0a2b" rev 2.00/0.01 addr 2
uvideo0 at uhub0 port 6 configuration 1 interface 0 "Generic Chicony USB 2.0 
Camera" rev 2.00/32.07 addr 3
video0 at uvideo0
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
sd1 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 006> SCSI2 0/direct fixed
sd1: 228896MB, 512 bytes/sector, 468779647 sectors
root on sd1a (927460f40d363126.a) swap on sd1b dump on sd1b
iwm0: hw rev 0x200, fw ver 16.242414.0, address e4:a4:71:e1:45:79
iwm0: failed to update MAC
iwm0: could not initiate scan
iwm0: could not initiate scan
nd6_rtrequest: bad gateway value: tap0
nd6_resolve: something odd happens
nd6_resolve: something odd happens
nd6_resolve: something odd happens
nd6_resolve: something odd happens
nd6_resolve: something odd happens
[ that line is repeated about 1500 times in the 3 hours this laptop has
  been running ]

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