Re: Weird Reboots
Russell Coker wrote:
> On Sun, 20 Jul 2003 03:40, Blu wrote:
> > On Sun, Jul 20, 2003 at 01:09:29AM -0500, Rod Rodolico wrote:
> > > I don't understand what is going on. My machine has
> rebooted 5 times
> > > between 10:00 and 18:00. I looked in syslog and the line
> contains 109 at
> > > signs (@).
> >
> > That could be somebody or something trying to use a buffer overflow
> > attack. That kind of attack often crashes the target
> machine and leaves
>
> "less" tends to display zeros in a file as '@' characters. A
> sudden reboot
> when a file is being written can often result in zeros at the
> end of the file
> when the meta-data has been updated before the file contents.
>
> Most likely it's a symptom of minor FS corruption.
>
I second that. Some (SuSE-specific?) versions of reiserfs did that pretty
often, it's a FAQ in the suse-security mailing list.
So I'd vote for bad memory or a dying cpu fan (which yields to freezes or
sudden reboots).
Thomas
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