Don't read unlimited data from files

It now guards against reading infinite files such as `/dev/zero`.
And most readings are bound with a (lax) limit.
As a side effect, more checking are done when reading a file and
overall the reading procedure is more robust.

PR #19095.
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Chocobo1 2023-06-14 13:38:19 +08:00 committed by GitHub
commit 79ca2e145f
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