This project contains known security vulnerabilities. Find detailed information at the bottom.

Crate tower-test


(6 total, 1 insecure)

 pin-project^11.0.7up to date
 tokio^ to date
 tokio-test^ to date
 tower-layer^ to date
 tower-service^ to date

Dev dependencies

(1 total, all up-to-date)

 tokio^ to date

Security Vulnerabilities

futures-util: MutexGuard::map can cause a data race in safe code


Affected versions of the crate had a Send/Sync implementation for MappedMutexGuard that only considered variance on T, while MappedMutexGuard dereferenced to U.

This could of led to data races in safe Rust code when a closure used in MutexGuard::map() returns U that is unrelated to T.

The issue was fixed by fixing Send and Sync implementations, and by adding a PhantomData<&'a mut U> marker to the MappedMutexGuard type to tell the compiler that the guard is over U too.