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Comment by rwmj | Hacker News Reader

It fuzzes individual syscalls. Does it string them together into sequences? (Edit: yes it does, but it doesn't look for priv escalations, only crashes, kernel panics and the like)

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It can be adapted to privlege escalations, but it doesn't do it on it's own. You have to give it a stub to check after running the syscalls to check if the permissions are intact.

Does it trace existing programs and use those as seeds in how to compose syscalls?

I don't think it's got the ability on it's own to do that, but I can imagine you could do it with strace and some other scripting.

When you have root, it doesn't take many more random syscalls to cause a panic.

Or just try a not-so-random one:

   kill(1, 9);

Huh. I guess it’s not too surprising, but that doesn’t work at all. init gets special treatment for signals.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin...

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