linux-cve-announce - CVE-2022-49109: ceph: fix inode reference leakage in ceph_get

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Message-ID: <2025022601-CVE-2022-49109-1b4f@gregkh>
Date: Wed, 26 Feb 2025 02:55:14 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49109: ceph: fix inode reference leakage in ceph_get_snapdir()

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

ceph: fix inode reference leakage in ceph_get_snapdir()

The ceph_get_inode() will search for or insert a new inode into the
hash for the given vino, and return a reference to it. If new is
non-NULL, its reference is consumed.

We should release the reference when in error handing cases.

The Linux kernel CVE team has assigned CVE-2022-49109 to this issue.


Affected and fixed versions
===========================

	Fixed in 5.15.34 with commit 3ae7163598c611a8892698e0c056fe794e52b44b
	Fixed in 5.16.20 with commit 9cd21981dedfb4fe9f344529e4be35727cb10940
	Fixed in 5.17.3 with commit b2d9bb3f06abddefdfa740b0a604575b6797e1bf
	Fixed in 5.18 with commit 322794d3355c33adcc4feace0045d85a8e4ed813

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2022-49109
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	fs/ceph/inode.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/3ae7163598c611a8892698e0c056fe794e52b44b
	https://git.kernel.org/stable/c/9cd21981dedfb4fe9f344529e4be35727cb10940
	https://git.kernel.org/stable/c/b2d9bb3f06abddefdfa740b0a604575b6797e1bf
	https://git.kernel.org/stable/c/322794d3355c33adcc4feace0045d85a8e4ed813