CVE-2022-49296

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A deadlock can occur in the Ceph component of the Linux kernel when a system is mounted with wsync. The issue arises during the creation of a file with O RDWR where the i inline version variable is incorrectly maintained as 1. When a buffer write is immediately performed, the system attempts to get capabilities and calls ceph netfs issue op inline(), which sends a getattr(Fsr) request to a metadata server (mds.1). A deadlock occurs because the metadata server (mds.0) attempts to revoke Fxwb capabilities from clients to transition the CInode::filelock state from exclusive to sync, while the kernel client already holds Fwb capabilities and is waiting for the getattr(Fsr) response. This involves the following functions: ceph atomic open(), ceph init file info(), ceph uninline data(), ceph write iter(), ceph write begin(), and ceph netfs issue read().

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.