this post was submitted on 29 Apr 2025
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The one-liner:

dd if=/dev/zero bs=1G count=10 | gzip -c > 10GB.gz

This is brilliant.

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[–] [email protected] 7 points 2 months ago (1 children)

Interesting. I wonder how long it takes until most bots adapt to this type of "reverse DoS".

[–] [email protected] 6 points 1 month ago

Then we'll just be more clever as well. It's an arms race after all.

[–] [email protected] 5 points 1 month ago

I want to know he they built that visualization

[–] [email protected] 5 points 2 months ago* (last edited 2 months ago)

How I read that code:

"If the dev folder's bullshit is equal to 1 gram..."

[–] [email protected] 4 points 2 months ago (4 children)

macOS compresses its memory. Does this mean we'll see bots running on macOS now?

[–] [email protected] 7 points 2 months ago (1 children)

Is it immune to zip bombs?

[–] [email protected] 4 points 2 months ago (1 children)

All I know is it compresses memory. The mechanism mentioned here for ZIP bombs to crash bots is to fill up memory fast with repeating zeroes.

[–] [email protected] 5 points 2 months ago

I thought it was to fill all available storage. Maybe it’s both?

[–] [email protected] 4 points 2 months ago (1 children)

No, but that's an interesting question. Ultimately it probably comes down to hardware specs. Or depending on the particular bot and it's env the spec of the container it's running in

Even with macos's style of compressing inactive memory pages you'll still have a hard cap that can be reached with the same technique (just with a larger uncompressed file)

[–] [email protected] 2 points 1 month ago (1 children)

How long would it take to be considered an inactive memory page? Does OOM conditions immediately trigger compression, or would the process die first?

[–] [email protected] 1 points 1 month ago

So I'm not an expert but my understanding is the flow is roughly:

  1. Available memory gets low
  2. Compress based on LRU rules
  3. Use swap
  4. OOM

So it's more meant to be preventative afaik

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[–] [email protected] 2 points 1 month ago

This is why I use things like Docusaurus to generate static sites. Vulnerability injections are pretty hard when there's no code to inject into.

[–] [email protected] 1 points 1 month ago
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