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

[Alexander Motin]

Hi.

Unfortunately I have never seen that, but I'll try to look harder. Could 
you please tell a bit about your controllers/devices? What triggered the 
issue?

If you still have the full dumps, could you check values of ccb_h, 
ccb_h->cbfcnp, ccb_h->path and ccb_h->path->periph for the "deadcode" 
somewhere or something?

On 23.10.2013 03:25, Bryan Drewery wrote:
> 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)

-- 
Alexander Motin