[Bug 203276] PC-BSD kernel panics if Adobe Flash Player Preferences is used to attempt a check for updates

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203276

--- Comment #4 from Graham Perrin <grahamperrin at gmail.com> ---
Another extract. From a dump of a panic that occurred on 2015-09-30. 

The events preceding this panic were memorable. The notebook had a wireless
network connection and the wireless router was working, but the OS could not
get Internet service. 

I tried to reproduce the panic, it didn't occur until long after I pressed the
button in the Adobe dialogue. 

The panic occurred after I did something to gain Internet connectivity.
Probably a restart of the network software. 


… 
<118>Sep 30 03:24:40 cces3-gjp4-pc-bsd-ergo-vista-621 wpa_supplicant[453]:
ioctl[SIOCS80211, op=26, val=0, arg_len=0]: Operation not supported


Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0x0
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff80914f89
stack pointer           = 0x28:0xfffffe00921afa20
frame pointer           = 0x28:0xfffffe00921afb20
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         = 12 (irq257: wpi0)
trap number             = 12
panic: page fault
cpuid = 1
KDB: stack backtrace:
#0 0xffffffff80ac8d27 at kdb_backtrace+0x67
#1 0xffffffff80a85059 at vpanic+0x189
#2 0xffffffff80a84ec3 at panic+0x43
#3 0xffffffff80f055e5 at trap_fatal+0x355
#4 0xffffffff80f05926 at trap_pfault+0x326
#5 0xffffffff80f04f84 at trap+0x464
#6 0xffffffff80ee8b9a at calltrap+0x8
#7 0xffffffff80a4761a at intr_event_execute_handlers+0x1da
#8 0xffffffff80a47a26 at ithread_loop+0xa6
#9 0xffffffff80a4472c at fork_exit+0x9c
#10 0xffffffff80ee90ce at fork_trampoline+0xe
Uptime: 11m8s
…

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