Messages in this thread | | | From | Grant Coady <> | Subject | Re: forkbombing Linux distributions | Date | Mon, 21 Mar 2005 16:14:57 +1100 |
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On Mon, 21 Mar 2005 14:27:55 +1100, Peter Chubb <peterc@gelato.unsw.edu.au> wrote:
>>>>>> "William" == William Beebe <wbeebe@gmail.com> writes: > >William> Sure enough, I created the following script and ran it as a >William> non-root user: > >William> #!/bin/bash $0 & $0 & > >There are two approaches to fixing this. > 1. Rate limit fork(). Unfortunately some legitimate usges do a lot > of forking, and you don't really want to slow them down. > 2. Limit (per user) the number of processes allowed. This is what's > currently done; and if you as administrator want to you can set > RLIMIT_NPROC in /etc/security/limits.conf > >On an almost-single-user system such as most desktops, there isn't much >point in setting this. On shared systems, it can be useful.
Had to try it out of curiosity, five ssh logins at the time, but I hit Ctrl-S on the terminal running forkbomb, then other terminals responsive and I could recover, do 'killall forkbomb'.
Even 'top' segfaulted. Machine didn't die though.
slackware-current running 2.4.29-hf5
Just checked logs, messages: --> kernel: VFS: file-max limit 52427 reached nothing in syslog or debug
Cheers, Grant.
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