What is the maximum size of the s3 bucket?
We have an AWS S3 bucket that accepts uploads from untrusted sources which are then processed and moved out of the bucket.
Is there a Policy that can limit the growth of the bucket to some predetermined upper bound to protect us in case something goes wrong?
The answer to your question - what is the maximum size of the s3 bucket- There's not such a policy as far as I know. That being said, you could trigger a lambda and then make this lambda check the properties of your bucket and then you would perform any actions you need.