gh-140607: Validate returned byte count in RawIOBase.read #140610
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While `RawIOBase.readinto` should return a count of bytes between 0 and the length of the given buffer, it is not required to. Add validation inside RawIOBase.read that the returned byte count is reasonable.
cmaloney
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needs backport to 3.13
cmaloney
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While
RawIOBase.readintoshould return a count of bytes between 0 and the length of the given buffer, it is not required to. Add validation inside RawIOBase.read that the returned byte count is reasonable.