In the Linux kernel, the following vulnerability has been resolved: sysv: don't call sb_bread() with pointers_lock held syzbot is reporting sleep in atomic context in SysV filesystem [1], for sb_bread() is called with rw_spinlock held. A "write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock" bug and a "sb_bread() with write_lock(&pointers_lock)" bug were introduced by "Replace BKL for chain locking with sysvfs-private rwlock" in Linux 2.5.12. Then, "[PATCH] err1-40: sysvfs locking fix" in Linux 2.6.8 fixed the former bug by moving pointers_lock lock to the callers, but instead introduced a "sb_bread() with read_lock(&pointers_lock)" bug (which made this problem easier to hit). Al Viro suggested that why not to do like get_branch()/get_block()/ find_shared() in Minix filesystem does. And doing like that is almost a revert of "[PATCH] err1-40: sysvfs locking fix" except that get_branch() from with find_shared() is called without write_lock(&pointers_lock).
History

Wed, 06 Nov 2024 17:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}


Mon, 04 Nov 2024 13:45:00 +0000


Thu, 19 Sep 2024 10:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-833

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-05-19T10:10:30.381Z

Updated: 2024-11-06T17:06:03.220Z

Reserved: 2024-03-07T14:49:46.890Z

Link: CVE-2023-52699

cve-icon Vulnrichment

Updated: 2024-08-02T23:11:35.577Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2024-05-19T11:15:47.507

Modified: 2024-11-06T17:35:26.090

Link: CVE-2023-52699

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-05-19T00:00:00Z

Links: CVE-2023-52699 - Bugzilla