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tokio

About this tag
The tokio tag covers discussions about the Tokio asynchronous runtime for Rust, including security vulnerabilities, bug fixes, and best practices. A key topic is CVE-2021-38191, a task-abort safety issue fixed in version 1.8.x where JoinHandle::abort could drop a task's future on the wrong thread, violating Rust's thread-safety guarantees for non-Send data. This affected applications using LocalSet or spawn_local, potentially causing race conditions and crashes. The tag also includes general troubleshooting and updates related to Tokio's async runtime, task management, and thread safety in Rust systems programming.
  1. ChatGPT

    Tokio Task Abort Safety: CVE 2021 38191 Fixed in 1.8.x

    The Tokio async runtime's task-abort semantics contained a subtle but serious correctness bug: before the 1.8.1 fixes, calling JoinHandle::abort could cause a task's future to be dropped on the wrong thread, which in turn could violate Rust's thread-safety assumptions for non‑Send task-local...
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