[OLPC Security] Securing the laptop: DoS

[John Moser]

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Ivan Krstić wrote:
> John Moser wrote:
>> Ivan Krstic wrote:
>>> The way I'm hoping to mitigate the NAND burn problem is by a combination
>>> of rate limiting and hard write quotas.
>> Both of which can lead to DoS
> 
> There are some details involved here that make me suspect DoS is less of
> a problem than it would be otherwise. Importantly, a misbehaving

DoS would be less of a problem than destroying the disk, for sure.

> application that triggers its rate limiting or write quota won't
> interfere with other applications' write ops, so a malicious application
> can only paint itself in a corner.
> 

fork() bomb defuser as well?


:(){ :|:;} :   # Standard CPU thrasher


:(){ :&:& echo 'bleep!' >> ~/..bleep.$$ ; sleep 2; rm ~/..bleep.$$}; :
    # Disk thrasher

(This is off the cuff and I don't know that it does what I think it
does; I *think* it spawns 2 :()'s in the background, writes "bleep!" to
~/..bleep.$$, waits 2 seconds, then removes ~/..bleep.$$)
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