Messages in this thread | | | Date | Sun, 5 Oct 2003 19:03:42 -0700 | From | Mike Fedyk <> | Subject | Re: reiserfs one user DoS? |
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On Mon, Oct 06, 2003 at 01:51:49AM +0200, Erik Tews wrote: > On Sun, Oct 05, 2003 at 06:09:24PM +0200, Christian Kujau wrote: > > Hans Reiser schrieb: > > >>I have found such strange thing: > > >> > > >>pseudo@avalon at 14:04:00 ~> dd if=/dev/zero of=file bs=1 count=0 > > >>seek=1000000000000 > > >> > > >>After that my Intel Celeron 800 MHz/384M RAM 60G/Seagate U6 under > > >>Linux-2.4.22-grsec on reiserfs was utilized 100% for more than 2 hours. > > >>dd process can't be killed. > > >> > > >>Is this my flow or real bug? > > >> > > >it is fixed in reiser4. linux has a lot of DOS vulerabilities to logged > > >in users, mostly due to the ability to consume all of some resource or > > >another. forgive me for not discussing them publicly.;-) > > > > perhaps "ulimit" could help here. > > Really? If I got a process which is unkillable, how can the kernel kill > this process if it runs out of cpu-time?
If it is unkillable, you're either talking about kernel bugs or NFS, and root should be able to kill a user process that has run out of ulimit resources. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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