On Wed, 17 Mar 1999, Jay Tribick wrote:
> Date: Wed, 17 Mar 1999 11:49:32 +0000 > From: Jay Tribick <netad...@fastnet.co.uk> > To: Dmitry Valdov <d...@dv.ru> > Cc: freebsd-current@FreeBSD.ORG, freebsd-secur...@freebsd.org > Subject: Re: disk quota overriding > > Hi > > > There is a way to overflow / filesystem even is quota is enabled. > > > > Just make many hard links (for example /bin/sh) to /tmp/ > > > > for ($q=0;$q<100000;$q++){ > > system ("ln /bin/sh /tmp/ln$q"); > > } > > > > Because /tmp directory usually owned by root that why quotas has no effect. > > *Directory* size of /tmp can be grown up to available space on / filesystem. > > > > Any way to fix it? > > Haven't tested this, but are you sure it fills the filesystem up - > all a hard link is, is a file with the same inode as the > original file (correct me if I'm wrong) - therefore it > doesn't actually use any space other than that required > to store the file entry. ^^^^^^^^^^^^^^^^^^^^^ Yes. But /tmp dir is under root filesystem. So *directory* size of /tmp can be grown up to free space on /. Which will result 0 bytes free on / :) All available space will be used to store directory entries. Dmitry. PS. Sorry for my english. To Unsubscribe: send mail to majord...@freebsd.org with "unsubscribe freebsd-current" in the body of the message