Messages in this thread | | | Date | Fri, 9 Feb 2007 19:23:31 -0500 | From | "Russ Cox" <> | Subject | Re: [PATCH] fix quadratic behavior of shrink_dcache_parent() |
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> "The file system mounted on /tmp/z in the example contains 2^50 > directories". heh. > > I do wonder how realistic this problem is in real life.
That's a fair concern, although I was trying this as part of evaluating how much someone could hose a system if we let them mount arbitrary FUSE servers. And the answer is: they could make it completely unusable, requiring reboot.
I ran a later test that printed how deep it got into the file tree and it was only a few hundred thousand if I recall correctly. A determined attacker might even manage to do this in a normal file system.
But sure, it's not a common case. ;-)
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