Ipfilter 4.1next panics 32 bit Solaris kernel

[Richard van den Berg]

I upgraded our Sparc Station 10 firewall to ipfilter 4.1.3 last week. It 
started stalling every other day. Since it was a very stable box (uptime 
2 years running ipf 3.4.x), I suspected ipf, and upgraded to 4.1next 
last friday (29/10/2004). That version panics the system every few 
hours. From /var/adm/messages:

Nov  1 09:17:57 blackhole unix: [ID 836849 kern.notice]
Nov  1 09:17:57 blackhole ^Mpanic[cpu0]/thread=fbe22e40:
Nov  1 09:17:57 blackhole unix: [ID 641622 kern.notice] BAD TRAP: type=9 
(Data fault) rp=fbe22694 addr=2 mmu_fsr=126 rw=1 occurred in module 
"ipf" due to a NULL pointer dereference
Nov  1 09:17:57 blackhole unix: [ID 100000 kern.notice]
Nov  1 09:17:57 blackhole unix: [ID 839527 kern.notice] sched:
Nov  1 09:17:57 blackhole unix: [ID 702911 kern.notice] Data fault
Nov  1 09:17:57 blackhole unix: [ID 189141 kern.notice] kernel read 
fault at addr=0x2, pme=0x0
Nov  1 09:17:57 blackhole unix: [ID 901159 kern.notice] MMU sfsr=126:
Nov  1 09:17:57 blackhole unix: [ID 164009 kern.notice]  Invalid Address
Nov  1 09:17:57 blackhole unix: [ID 490779 kern.notice]  on supv data 
fetch at level 1
Nov  1 09:17:57 blackhole unix: [ID 100000 kern.notice]
Nov  1 09:17:57 blackhole unix: [ID 546445 kern.notice] pte addr = 
0xf592f000, level = 1
Nov  1 09:17:58 blackhole unix: [ID 913234 kern.notice] pid=0, 
pc=0xf629f094, sp=0xfbe226e0, psr=0x410007c1, context=0
Nov  1 09:17:58 blackhole unix: [ID 655124 kern.notice] g1-g7: ff90e347, 
0, 0, fbe22914, 0, f0041000, fbe22e40
Nov  1 09:17:58 blackhole unix: [ID 100000 kern.notice]
Nov  1 09:17:58 blackhole genunix: [ID 872817 kern.notice] fbe22510 
unix:die+b8
(9, f024ca68, f024c8c4, 126, 1, 126)
Nov  1 09:17:58 blackhole genunix: [ID 645206 kern.notice]   %l0-7: 
fbe22694 00000002 fbe22694 f5e1ad00 00000000 f5e1ad0c 00000040 00000014
Nov  1 09:17:58 blackhole genunix: [ID 872817 kern.notice] fbe22590 
unix:trap+790 (0, 1, f0000000, f02583a8, 0, 0)
Nov  1 09:17:58 blackhole genunix: [ID 645206 kern.notice]   %l0-7: 
00000000 00000000 fbe22694 00000009 00000126 00000001 f5de2f08 f644bae0
Nov  1 09:17:58 blackhole genunix: [ID 872817 kern.notice] fbe22638 
unix:fault+84 (f5e0f886, 15b05, 2, f644bae0, ffff149b, eb64)

The list of traps/faults goes on until the machine reboots. We've 
downgraded to ipfilter 3.4.35 to see how that will hold.

Is anyone else seeing this?
Richard