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# Fuzzer environment on ClusterFuzz
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2016-11-26 23:59:29 +00:00
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Your fuzzers will be run on a [Google Compute Engine](https://cloud.google.com/compute/) VM (Linux) with some security restrictions.
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2016-11-07 21:08:44 +00:00
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## Current working directory
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2016-11-26 23:59:29 +00:00
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You should not make any assumptions about the current working directory of your
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fuzzer. If you need to load data files, please use `argv[0]` to get the
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2016-11-26 23:59:29 +00:00
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directory where your fuzzer executable is located.
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2016-11-07 21:08:44 +00:00
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2016-11-29 19:47:37 +00:00
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## File system
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Everything except `/tmp` is read-only, including the directory that your fuzzer
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executable lives in. Note that `/tmp` is limited in size (64MB).
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## Network access
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There will be no network interfaces available (not even loopback).
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