CVE-2024-58042

Summary

CVE-2024-58042: A vulnerability in the Linux kernel's rhashtable has been addressed. The issue involved a potential deadlock between the rhashtable bucket, rq lock, and dsq lock, which could trigger a lockdep warning. This was due to a circular locking dependency that has been resolved by moving the hash table growth check and work scheduling outside the rht lock. This change enhances the flexibility of rhashtable by eliminating restrictive locking and allows its use in scheduler and workqueue contexts more effectively. Additionally, atomic_inc is also moved outside of the bucket lock along with the growth above 75% check.

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