Mimalloc Can Allocate Memory with Bad Alignment
Moderate severity
GitHub Reviewed
Published
Nov 12, 2024
to the GitHub Advisory Database
•
Updated Nov 12, 2024
Description
Published to the GitHub Advisory Database
Nov 12, 2024
Reviewed
Nov 12, 2024
Last updated
Nov 12, 2024
This crate depended on a promise regarding alignments made by the author of the mimalloc allocator to avoid using aligned allocation functions where possible for performance reasons.
Since then, the mimalloc allocator's logic changed, making it break this promise.
This caused this crate to return memory with an incorrect alignment for some allocations, particularly those with large alignments.
The flaw was fixed by always using the aligned allocation functions.
References