this post was submitted on 11 Nov 2025
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[–] A_norny_mousse@feddit.org 10 points 3 days ago* (last edited 3 days ago) (2 children)

The good old fork bomb.

function f
    while true; do
        f &
    done

edit: forgot the ampersand - the actual fork

[–] io@piefed.blahaj.zone 12 points 3 days ago* (last edited 3 days ago) (1 children)

not sure but for it to be a fork bomb you need something like & in ur pseudo code to go on to the next call

rn the first call of f within the loop never completes so the second doesn't happen. So this is "just" infinite recursion

pls don't scream at me should i be wrong.

edit: i meant "completes" not "compiles"

[–] A_norny_mousse@feddit.org 2 points 3 days ago

No you're right.

I also attempted to write pseudocode; not sure bash will even do this without curly brackets.

[–] palordrolap@fedia.io 3 points 3 days ago

On my computer, this pushes one core to ~60%, eats ~40MB of memory over the course of about a minute and then segfaults.

I did make one small change to the condition which would mean that it would bail out if available memory got too low, but 40MB barely even registered so it was basically true the whole time. In retrospect, I probably should have been monitoring process count instead (or done both), but I guess I got away with it.

As OP says, you need to create subprocesses with & to cause real problems.

*Bash 5.2.15 / LMDE6 / who knows what other factors. Try these things at your own risk. Or better, just don't.