panic in dummynet

[Sergey Kandaurov]

Hi.

This is a 8.1 box, not very much loaded.
It has two simple dummynet rules.
That's the first time it panics there. Any hints?

db> x/s *panicstr
0:      *** error reading from address 0 ***
db> bt
Tracing pid 0 tid 100116 td 0xffffff000ab057c0
m_copym() at m_copym+0x37
ip_fragment() at ip_fragment+0x132
ip_output() at ip_output+0xeef
dummynet_send() at dummynet_send+0x14c
dummynet_task() at dummynet_task+0x1b7
taskqueue_run() at taskqueue_run+0x93
taskqueue_thread_loop() at taskqueue_thread_loop+0x46
fork_exit() at fork_exit+0x118
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip = 0, rsp = 0xffffff8399222d30, rbp = 0 ---

-- 
wbr,
pluknet