RUSTSEC-2023-0005: tokio::io::ReadHalf<T>::unsplit is Unsound

[github-actions]

tokio::io::ReadHalf<T>::unsplit is Unsound

Details
Status	unsound
Package	tokio
Version	0.2.25
URL	tokio-rs/tokio#5372
Date	2023-01-11

tokio::io::ReadHalf<T>::unsplit can violate the Pin contract

The soundness issue is described in the tokio/issues#5372

Specific set of conditions needed to trigger an issue (a !Unpin type in ReadHalf)
is unusual, combined with the difficulty of making any arbitrary use-after-free
exploitable in Rust without doing a lot of careful alignment of data types in
the surrounding code.

The tokio feature io-util is also required to be enabled to trigger this
soundness issue.

Thanks to zachs18 reporting the issue to Tokio team responsibly and taiki-e
and carllerche appropriately responding and fixing the soundness bug.

Tokio before 0.2.0 used futures 0.1 that did not have Pin, so it is not
affected by this issue.

See advisory page for additional details.

[github-actions]

Issue has been automatically marked as stale due to inactivity for 90 days. Update the issue to remove label, otherwise it will be automatically closed.

[github-actions]

Issue has been automatically marked as stale due to inactivity for 90 days. Update the issue to remove label, otherwise it will be automatically closed.

[github-actions]

Issue has been automatically marked as stale due to inactivity for 90 days. Update the issue to remove label, otherwise it will be automatically closed.