panic: in pf_reassemble() ?

[Ian Freislich]

Hi

So, I thought I'd run a benchmark and see how my forwarding did.
I got the following panic, easily provokable:

Fatal trap 9: general protection fault while in kernel mode
cpuid = 10; apic id = 0a
instruction pointer     = 0x20:0xffffffff801bc111
stack pointer           = 0x28:0xffffff81ccae46b0
frame pointer           = 0x28:0xffffff81ccae4710
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 11 (irq258: bce2)
trap number             = 9
panic: general protection fault
cpuid = 10
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
panic() at panic+0x182
trap_fatal() at trap_fatal+0x2ad
trap() at trap+0x10b
calltrap() at calltrap+0x8
--- trap 0x9, rip = 0xffffffff801bc111, rsp = 0xffffff81ccae46b0, rbp = 0xffffff
81ccae4710 ---
pf_reassemble() at pf_reassemble+0xb1
pf_normalize_ip() at pf_normalize_ip+0x694
pf_test() at pf_test+0x78e
pf_check_in() at pf_check_in+0x39
pfil_run_hooks() at pfil_run_hooks+0x9c
ip_fastforward() at ip_fastforward+0x319
ether_demux() at ether_demux+0x131
ether_input() at ether_input+0x1e0
ether_demux() at ether_demux+0x6f
ether_input() at ether_input+0x1e0
bce_intr() at bce_intr+0x398
intr_event_execute_handlers() at intr_event_execute_handlers+0x100
ithread_loop() at ithread_loop+0x8e
fork_exit() at fork_exit+0x117
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip = 0, rsp = 0xffffff81ccae4d30, rbp = 0 ---

I also got a core, but it's totally useless:

[firewall2.jnb1] ~ # kgdb -c /var/crash/vmcore.10 /boot/kernel/kernel 
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "amd64-marcel-freebsd"...(no debugging symbols found)...
Attempt to extract a component of a value that is not a structure pointer.
Attempt to extract a component of a value that is not a structure pointer.
Attempt to extract a component of a value that is not a structure pointer.
Attempt to extract a component of a value that is not a structure pointer.
kgdb: kvm_read: invalid address (0xffffff009c31a460)
#0  0x0000000000000000 in ?? ()

I can setup remote GDB and set this panic off again if there's
something specific someone would like me to look at.

Ian

--
Ian Freislich