Hi!
> > >main() { while(1) if (fork()) malloc(1); }
> > >With the patch below I could ssh to the host and killall the offending
> > >processes. To enable reserving VM space for root do
> > what about main() { while(1) system("ftp localhost &"); }
> > This. or so,ething similar should allow you to kill your machine
> > even with your patch from normal user account
>
> This or something similar didn't kill the box [I've tried all local
> DoS from Packetstorm that I could find]. Please send a working
Sorry, I did not have working example, just feeling that something
like that should be possible.
> Note, I'm not discussing "local user can kill the box without limits",
> I say Linux "deadlocks" [it starts its own autonom life and usually
> your only chance is to hit the reset button] when there is continuous
> VM pressure by user applications. If you think fork() kills the box
That's clear bug, right? It should not deadlock, it should go to
OOM-killer and kill someone.
> BTW, I have a new version of the patch with that Linux behaves much
> better from root's point of view when the memory is more significantly
> overcommited. I'll post it if I have time [and there is interest].
There is interest. Yesterday atrey died due userland process eating
all memory.
Pavel
PS: atrey is machine that gets my mail, so it is kind of important to
me.
-- I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care." Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Nov 23 2000 - 21:00:16 EST