[CAM] panic / general protection fault while in kernel mode on head r256931

Encountered twice:

> Fatal trap 9: general protection fault while in kernel mode
> cpuid = 0; apic id = 00
> instruction pointer     = 0x20:0xffffffff802e612a
> stack pointer           = 0x28:0xfffffe118af62b20
> frame pointer           = 0x28:0xfffffe118af62b60
> 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         = 2 (doneq0)
> trap number             = 9
> panic: general protection fault
> cpuid = 0
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe118af62690
> kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe118af62740
> vpanic() at vpanic+0x126/frame 0xfffffe118af62780
> panic() at panic+0x43/frame 0xfffffe118af627e0
> trap_fatal() at trap_fatal+0x3a2/frame 0xfffffe118af62840
> trap() at trap+0x863/frame 0xfffffe118af62a60
> calltrap() at calltrap+0x8/frame 0xfffffe118af62a60
> --- trap 0x9, rip = 0xffffffff802e612a, rsp = 0xfffffe118af62b20, rbp = 0xfffffe118af62b60 ---
> xpt_done_process() at xpt_done_process+0x36a/frame 0xfffffe118af62b60
> xpt_done_td() at xpt_done_td+0x13d/frame 0xfffffe118af62bb0
> fork_exit() at fork_exit+0x84/frame 0xfffffe118af62bf0
> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe118af62bf0
> --- trap 0, rip = 0, rsp = 0xfffffe118af62cb0, rbp = 0 ---

2nd:

> Fatal trap 9: general protection fault while in kernel mode
> cpuid = 5; apic id = 05
> instruction pointer     = 0x20:0xffffffff802e612a
> stack pointer           = 0x28:0xfffffe118af62b20
> frame pointer           = 0x28:0xfffffe118af62b60
> 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         = 2 (doneq0)
> trap number             = 9
> panic: general protection fault
> cpuid = 5
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe118af62690
> kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe118af62740
> vpanic() at vpanic+0x126/frame 0xfffffe118af62780
> panic() at panic+0x43/frame 0xfffffe118af627e0
> trap_fatal() at trap_fatal+0x3a2/frame 0xfffffe118af62840
> trap() at trap+0x863/frame 0xfffffe118af62a60
> calltrap() at calltrap+0x8/frame 0xfffffe118af62a60
> --- trap 0x9, rip = 0xffffffff802e612a, rsp = 0xfffffe118af62b20, rbp = 0xfffffe118af62b60 ---
> xpt_done_process() at xpt_done_process+0x36a/frame 0xfffffe118af62b60
> xpt_done_td() at xpt_done_td+0x13d/frame 0xfffffe118af62bb0
> fork_exit() at fork_exit+0x84/frame 0xfffffe118af62bf0
> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe118af62bf0
> --- trap 0, rip = 0, rsp = 0xfffffe118af62cb0, rbp = 0 ---

> (kgdb) #0  doadump (textdump=1) at pcpu.h:219
> #1  0xffffffff808bbb27 in kern_reboot (howto=260)
>     at /usr/src/sys/kern/kern_shutdown.c:447
> #2  0xffffffff808bc035 in vpanic (fmt=<value optimized out>,
>     ap=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:754
> #3  0xffffffff808bc083 in panic (fmt=<value optimized out>)
>     at /usr/src/sys/kern/kern_shutdown.c:683
> #4  0xffffffff80cb62d2 in trap_fatal (frame=<value optimized out>,
>     eva=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:882
> #5  0xffffffff80cb5f13 in trap (frame=<value optimized out>)
>     at /usr/src/sys/amd64/amd64/trap.c:224
> #6  0xffffffff80c9b3a2 in calltrap ()
>     at /usr/src/sys/amd64/amd64/exception.S:232
> #7  0xffffffff802e612a in xpt_done_process (ccb_h=0xfffff80145911800)
>     at /usr/src/sys/cam/cam_xpt.c:5242
> #8  0xffffffff802e905d in xpt_done_td (arg=0xffffffff8144db80)
>     at /usr/src/sys/cam/cam_xpt.c:5274
> #9  0xffffffff8088b064 in fork_exit (
>     callout=0xffffffff802e8f20 <xpt_done_td>, arg=0xffffffff8144db80,
>     frame=0xfffffe118af62c00) at /usr/src/sys/kern/kern_fork.c:995
> #10 0xffffffff80c9b8de in fork_trampoline ()
>     at /usr/src/sys/amd64/amd64/exception.S:606
> #11 0x0000000000000000 in ?? ()
> Current language:  auto; currently minimal
> (kgdb)



-- 
Regards,
Bryan Drewery