Panic: UDP header not in one mbuf

[Sven Willenberger <sven@xxxxxxx>]

I am not sure if this is the proper mailing list for this question; if
not, please direct me accordingly.

On a DragonFly 1.1-Current machine (cvsupped and built 8/19/2004) I
receive the following output after a panic (with DDB enabled in kernel):

panic: UDP header not in one mbuf
mp_lock=00000000; cpuid=0; lapic.id=00000000
panic(14,debda010,0,daceaccc,c020d1c0) at panic+0xc2
panic(c031bde9,14,debda010,0,62000000) at panic+0xc2
udp_input(de518500,14,11,c3d726d8,daaa8c40) at udp_input+0x4c
transport_processing_oncpu(de518500,14,debda010,0,c3c43d00) at
transport_processing_oncpu+0x65
ip_input(de518500) at ip_input+0x92
ip_input_handler(c2c43d000) at input_input_handler+0x10
netmsg_service_loop(0,0,0,0,0) at netmsg_service_loop+0x25
lwkt_exit() at lwkt_exit

I have been having issues of this nature for a while - I suspect an
issue I am having with bind (named) crashing is related to this.

The machines are Supermicro 6013P-8 with dual P4 (Xeon) procs. ACPI is
disabled, HTT is not. The machines process a decent volume (65k pieces
daily) of email and use mimedefang/spamassassin/sendmail along with a
local caching instance of named.

DragonFly 1.1-CURRENT #0: Thu Aug 19 13:17:57 EDT 2004
    svenw@mymachine:/usr/obj/usr/src/sys/CUSTOM
TSC clock: 2399580924 Hz, i8254 clock: 1193312 Hz
CPU: Intel(R) Xeon(TM) CPU 2.40GHz (2399.33-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf29  Stepping = 9
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,
PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Hyperthreading: 2 logical CPUs
real memory  = 2146959360 (2096640K bytes)
avail memory = 2080931840 (2032160K bytes)
Programming 24 pins in IOAPIC #0
IOAPIC #0 intpin 2 -> irq 0
Programming 24 pins in IOAPIC #1
Programming 24 pins in IOAPIC #2
DragonFly/MP: Multiprocessor motherboard
 cpu0 (BSP): apic id:  0, version: 0x00050014, at 0xfee00000
 cpu1 (AP):  apic id:  6, version: 0x00050014, at 0xfee00000
 cpu2 (AP):  apic id:  1, version: 0x00050014, at 0xfee00000
 cpu3 (AP):  apic id:  7, version: 0x00050014, at 0xfee00000
 io0 (APIC): apic id:  2, version: 0x00178020, at 0xfec00000
 io1 (APIC): apic id:  3, version: 0x00178020, at 0xfec80000
 io2 (APIC): apic id:  4, version: 0x00178020, at 0xfec80400
Preloaded elf kernel "/kernel" at 0xc042b000.
Pentium Pro MTRR support enabled

At the debug prompt the keyboard was unresponsive so I was unable to
trace or where any further.

Any ideas?

Sven