[parisc-linux] B132L+ crash with mpg123

[Thibaut VARENE]

Le mercredi, 18 sep 2002, =E0 03:02 Europe/Paris, Carlos O'Donell a =
=E9crit=20
:

>>>> Kernel Fault: Code=3D15 regs=3D11ddc640 (Addr=3D00277e00)
>>>>
>>>>       YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
>>>> PSW: 00000000000011000000000000001111 Not tainted
>>>> r00-03  00000000 00000023 101feac4 00000200
>>> ...
>>>> IASQ: 00000000 0000000 IAOQ: 10263c78 10263c70
>>> ...
>>> what symbols do 101feac4 and 10263c78 refer to?
>>
>> 10263c78 is in copy_from_user, 101feac4 is in harmony_audio_write().
>> the only point at which we call copy_from_user is:
>>
>>                 /* Copy the page to an aligned buffer */
>>                 copy_from_user(played_buf.addr +=20
>> (HARMONY_BUF_SIZE*buf_to_fill)
>> 					+ harmony.play_offset,
>> 				buffer+count, frame_size);
>>
>
> Data TLB miss fault / Data page fault.
>
> Looks like it walked a little too far into some address that
> wasn't mapped?
Yeah,
I caught Matthieu Delahaye lately, he told me that it was probably a
failing "modulo" on the calculation of the remaining size of buffer
to be sent to the audio card, or something like that...
>
> c.


Thibaut VARENE
PA/Linux ESIEE Team
http://pateam.esiee.fr/=