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    SubjectRe: Linux 2.5.73 - panic (freed memory) on CD-Recorder errors
    On Mon, Jun 23 2003, Pavel Roskin wrote:
    > Hello!
    > I have been experiencing kernel panics with 2.5.x kernels when writing
    > oversized images like Knoppix to low-quality CDs using the IDE driver
    > without SCSI emulation.
    > Finally I have found a very simple way to reproduce the panic immediately
    > and without sacrificing a blank CD. Just try writing over a recorded disc
    > in the dummy mode (i.e. with the laser turned off).
    > I have captured the panic on the serial console. cdrecord was running on
    > that terminal as well, so you see the order in which it happened. The
    > kernel .config file and the kernel messages (without serial console being
    > active) are attached.
    > This panic occurred on Linux 2.5.73, but I remember the same function
    > names in the stack trace with older 2.5.x kernels when I was writing
    > Knoppix.
    > Note 6b6b6b6b in the eax and esi registers and on the stack. That must be
    > freed memory. __end_that_request_first() is a static function in
    > drivers/block/ll_rw_blk.c

    That doesn't look good. I'll try and reproduce + fix here, thanks for
    the report.

    Jens Axboe

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