Fwd: Re: VIMAGE + NDIS

[Julian Elischer]

  anyone here have NDIS experience?

  On 9/27/10 10:51 AM, Nikos Vassiliadis wrote:
>  Julian Elischer wrote:
>>>  #10 0xc0978200 in rt_dispatch (m=0xc764ad00, sa=0x0) at
>>>  /usr/src/sys/net/rtsock.c:1374
>>>  1374            if (V_loif)
>>>  (kgdb) list
>>>  1369                    }
>>>  1370                    *(unsigned short *)(tag + 1) = sa->sa_family;
>>>  1371                    m_tag_prepend(m, tag);
>>>  1372            }
>>>  1373    #ifdef VIMAGE
>>>  1374            if (V_loif)
>>>  1375                    m->m_pkthdr.rcvif = V_loif;
>>>  1376            else {
>>>  1377                    m_freem(m);
>>>  1378                    return;
>>>  (kgdb)
>>>
>>
>>  ok so probably there is a code-path to this point that does not first
>>  set up the current-vnet pointer before doing this.
>>  what you need to do is to produce a stack-trace so we can see how
>>  it got here,
>>  and then we can figure out where on that path we should set the
>>  pointer.
>
>  Here it is:
>  (kgdb) #0  doadump () at pcpu.h:231
>  #1  0xc04d48b9 in db_fncall (dummy1=1, dummy2=0, dummy3=-1058443808,
>      dummy4=0xeef1d720 "") at /usr/src/sys/ddb/db_command.c:548
>  #2  0xc04d4cb1 in db_command (last_cmdp=0xc0df4bdc, cmd_table=0x0,
>  dopager=1)
>      at /usr/src/sys/ddb/db_command.c:445
>  #3  0xc04d4e0a in db_command_loop () at
>  /usr/src/sys/ddb/db_command.c:498
>  #4  0xc04d6d0d in db_trap (type=12, code=0) at
>  /usr/src/sys/ddb/db_main.c:229
>  #5  0xc08e17ce in kdb_trap (type=12, code=0, tf=0xeef1d948)
>      at /usr/src/sys/kern/subr_kdb.c:535
>  #6  0xc0c0ae7f in trap_fatal (frame=0xeef1d948, eva=24)
>      at /usr/src/sys/i386/i386/trap.c:929
>  #7  0xc0c0b140 in trap_pfault (frame=0xeef1d948, usermode=0, eva=24)
>      at /usr/src/sys/i386/i386/trap.c:851
>  #8  0xc0c0bad5 in trap (frame=0xeef1d948) at
>  /usr/src/sys/i386/i386/trap.c:533
>  #9  0xc0bec9ac in calltrap () at /usr/src/sys/i386/i386/exception.s:166
>  #10 0xc0978200 in rt_dispatch (m=0xc764ad00, sa=0x0)
>      at /usr/src/sys/net/rtsock.c:1374
>  #11 0xc0978864 in rt_ifmsg (ifp=0xc6c3d400) at
>  /usr/src/sys/net/rtsock.c:1168
>  #12 0xc76704a1 in ?? ()
>  #13 0xc6c3d400 in ?? ()
>  #14 0xeef1daa8 in ?? ()
>  #15 0xeef1daf4 in ?? ()
>  #16 0xc769ecb3 in NdisMIndicateStatusComplete (adapter=0xc76b9200)
>      at /usr/src/sys/modules/ndis/../../compat/ndis/subr_ndis.c:3105
>  #17 0xc766d8a1 in ?? ()
>  #18 0xc76b9200 in ?? ()
>  #19 0xc76c0000 in ?? ()
>  #20 0xc76f1000 in ?? ()
>  #21 0xeef1dacc in ?? ()
>  #22 0xc79d2afd in ndis_bcmwl5_sys_drv_data_start ()
>     from /boot/modules/bcmwl5_sys.ko
>  #23 0x006c0000 in ?? ()
>  #24 0xeef1dbb4 in ?? ()
>  #25 0xc79dcdac in ndis_bcmwl5_sys_drv_data_start ()
>     from /boot/modules/bcmwl5_sys.ko
>  #26 0xc76c0000 in ?? ()
>  #27 0xc76c0000 in ?? ()
>  #28 0xc7340800 in ?? ()
>  #29 0xc086adcc in hardclock_cpu (usermode=7077888)
>      at /usr/src/sys/kern/kern_clock.c:447


whoa!
hardclock interrupted itself?

>  #30 0xc79d2afd in ndis_bcmwl5_sys_drv_data_start ()
>     from /boot/modules/bcmwl5_sys.ko
>  #31 0x006c0000 in ?? ()
>  #32 0xeef1dbb4 in ?? ()
>  #33 0xc79dcdac in ndis_bcmwl5_sys_drv_data_start ()
>     from /boot/modules/bcmwl5_sys.ko
>  #34 0xc76c0000 in ?? ()
>  #35 0xc76c0000 in ?? ()
>  #36 0xc7340800 in ?? ()

hmmm maybe we need to get ndis to put in  a wrapper at this point that
is called form hardclock and sets the value before going further

I'd have to look at the code to see what happens here..

*wonders who has their fingers in this code*..

>  #37 0xc086adcc in hardclock_cpu (usermode=-949223424)
>      at /usr/src/sys/kern/kern_clock.c:447
>  Previous frame inner to this frame (corrupt stack?)
>  (kgdb)
>
>
>  and the panic, in case it helps:
>  Fatal trap 12: page fault while in kernel mode
>  cpuid = 1; apic id = 01
>  fault virtual address   = 0x18
>  fault code              = supervisor read, page not present
>  instruction pointer     = 0x20:0xc0978200
>  stack pointer           = 0x28:0xeef1d988
>  frame pointer           = 0x28:0xeef1d9a0
>  code segment            = base 0x0, limit 0xfffff, type 0x1b
>                          = DPL 0, pres 1, def32 1, gran 1
>  processor eflags        = interrupt enabled, resume, IOPL = 0
>  current process         = 1404 (Windows Workitem 3)
>  panic: from debugger
>  cpuid = 1
>  KDB: stack backtrace:
>  Physical memory: 2916 MB
>  Dumping 113 MB: 98 82 66 50 34 18 2
>
>  Thanks, Nikos
>

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