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Reject infinitely-sized reads from io::Repeat #119991

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Jan 30, 2024
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Reject infinitely-sized reads from io::Repeat #119991

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10 changes: 10 additions & 0 deletions library/std/src/io/util.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -204,6 +204,16 @@ impl Read for Repeat {
Ok(())
}

/// This function is not supported by `io::Repeat`, because there's no end of its data
fn read_to_end(&mut self, _: &mut Vec<u8>) -> io::Result<usize> {
Err(io::Error::from(io::ErrorKind::OutOfMemory))
}

/// This function is not supported by `io::Repeat`, because there's no end of its data
fn read_to_string(&mut self, _: &mut String) -> io::Result<usize> {
Err(io::Error::from(io::ErrorKind::OutOfMemory))
}

#[inline]
fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
let mut nwritten = 0;
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