Bogus signal handler causes kernel panic (5.2.1-p8/i386)

Don Bowman don at
Wed Jun 16 13:03:47 GMT 2004

From: Simon Barner [mailto:barner at]
> Hi,
> I tried the local denial of service attack described in [1], that was
> reported for Linux 2.4 and 2.6 some days ago (see [2] for the original
> thread in linux.kernel)  on my FreeBSD 5.2.1-p8 system.
> The result is a kernel panic (back trace attached).
> Since des@ told me in a private mail, that he could not reprocduce the
> panic on -CURRENT, I'd like to ask how to proceed from here.
> Is the problem known to be fixed in current?
> Is somebody able to reproduce this on FreeBSD 5.2.1 (I am sorry,
> upgrading to -CURRENT is out of question for me)?
> Please note, that the problem does not exist on FreeBSD 4.9 (the test
> program simply dumps core (bt attached)).
> Thanks in advance for your hints,
>  Simon

On current, this doesn't seem to do anything bad for me.


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