Hi,

On Mon, Sep 12, 2022 at 02:27:57PM +0200, Gert Doering wrote:
> trying to load my newly-instrumented if_ovpn.ko, I kldunload'ed the
> existing one - without shutting down *all* OpenVPN instances first.
> 
> *Boom*...
> 
> Console attached.

Ah, nice, dmesg has all the info in text format, no need to send PNGs
to the list :-)


-------------------- snip ----------------
ovpn3: changing name to 'tun11'
tun8: link state changed to DOWN
ovpn4: changing name to 'tun4'
tun4: link state changed to UP
tun4: promiscuous mode enabled

Warning: memory type ovpn leaked memory on destroy (1 allocations, 2048 bytes 
leaked).


Fatal trap 12: page fault while in kernel mode
cpuid = 3; apic id = 06
fault virtual address   = 0xffffffff82f81d70
fault code              = supervisor read instruction, page not present
instruction pointer     = 0x20:0xffffffff82f81d70
stack pointer           = 0x28:0xfffffe000859edf8
frame pointer           = 0x28:0xfffffe000859ee40
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         = 0 (softirq_3)
trap number             = 12
panic: page fault
cpuid = 3
time = 1662985342
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe000859ebb0
vpanic() at vpanic+0x151/frame 0xfffffe000859ec00
panic() at panic+0x43/frame 0xfffffe000859ec60
trap_fatal() at trap_fatal+0x387/frame 0xfffffe000859ecc0
trap_pfault() at trap_pfault+0xab/frame 0xfffffe000859ed20
calltrap() at calltrap+0x8/frame 0xfffffe000859ed20
--- trap 0xc, rip = 0xffffffff82f81d70, rsp = 0xfffffe000859edf8, rbp = 
0xfffffe000859ee40 ---
__stop_set_sysinit_set() at __stop_set_sysinit_set+0x5350/frame 
0xfffffe000859ee40
gtaskqueue_run_locked() at gtaskqueue_run_locked+0xa7/frame 0xfffffe000859eec0
gtaskqueue_thread_loop() at gtaskqueue_thread_loop+0xc2/frame 0xfffffe000859eef0
fork_exit() at fork_exit+0x80/frame 0xfffffe000859ef30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe000859ef30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
---<<BOOT>>---


gert
-- 
"If was one thing all people took for granted, was conviction that if you 
 feed honest figures into a computer, honest figures come out. Never doubted 
 it myself till I met a computer with a sense of humor."
                             Robert A. Heinlein, The Moon is a Harsh Mistress

Gert Doering - Munich, Germany                             g...@greenie.muc.de

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