DoS Vulnerability in Linux Kernel Affecting Ceph

CVE-2024-53685

Summary

In the Linux kernel, a vulnerability in the Ceph file system allows for a denial of service scenario when the function ceph_mdsc_build_path() attempts to construct a path exceeding the system's PATH_MAX limit. This oversight results in an infinite retry loop, rendering the system largely unusable as tasks are blocked indefinitely. As a mitigation, it is proposed to remove the retry mechanism and return an ENAMETOOLONG error instead, effectively preventing the system from becoming unresponsive under such conditions.

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