ifconfig carp1 destroy = kernel panic

[Stefan Lambrev]

Hi all,

This combination of commands lead my freebsd servers to kernel panic.

ifconfig bge0 192.168.1.1 netmask 255.255.255.0
ifconfig bge0 alias 10.1.1.1 netmask 255.255.255.0
ifconfig carp create
ifconfig carp create
ifconfig carp0 192.168.1.222/24 vhid 1 advskew 0 pass somekey
ifconfig carp1 10.1.1.222/24 vhid 2 advskew 0 pass somekey
- to this point everything is ok -
ifconfig carp1 destroy - at this point this will cause kernel panic.
I tested with ifconfig carp1 delete before destroy but the result is the 
same.

tested on freebsd 6.2 pre-release i386 SMP and freebsd 6.2 release amd64 
SMP - in both cases kernel panic.

This seems very similar to this PR - 
http://www.freebsd.org/cgi/query-pr.cgi?pr=92776

I'm going to test on 6.2 stable from today, but I'm not very optimistic.

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x24
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc0555bcd
stack pointer           = 0x28:0xe4b77bd4
frame pointer           = 0x28:0xe4b77be8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                                 = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 14 (swi1: net)
trap number             = 12
panic: page fault
cpuid = 0
Uptime: 7m2s
Cannot dump. No dump device defined.
aac0: shutting down controller...done

P.S. should I open new PR or just follow up to pr #92776 ?

-- 
Best Wishes,
Stefan Lambrev
ICQ# 24134177