In the Linux kernel, the following vulnerability has been resolved:
btrfs: zoned: fix lock ordering in btrfs_zone_activate()
The btrfs CI reported a lockdep warning as follows by running generic
generic/129.
WARNING: possible circular locking dependency detected
6.7.0-rc5+ #1 Not tainted
------------------------------------------------------
kworker/u5:5/793427 is trying to acquire lock:
ffff88813256d028 (&cache->lock){+.+.}-{2:2}, at: btrfs_zone_finish_one_bg+0x5e/0x130
but task is already holding lock:
ffff88810a23a318 (&fs_info->zone_active_bgs_lock){+.+.}-{2:2}, at: btrfs_zone_finish_one_bg+0x34/0x130
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&fs_info->zone_active_bgs_lock){+.+.}-{2:2}:
...
-> #0 (&cache->lock){+.+.}-{2:2}:
...
This is because we take fs_info->zone_active_bgs_lock after a block_group's
lock in btrfs_zone_activate() while doing the opposite in other places.
Fix the issue by expanding the fs_info->zone_active_bgs_lock's critical
section and taking it before a block_group's lock.
References
Configurations
Configuration 1 (hide)
|
History
19 Sep 2025, 14:26
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* |
|
| CWE | CWE-667 | |
| References | () https://git.kernel.org/stable/c/1908e9d01e5395adff68d9d308a0fb15337e6272 - Patch | |
| References | () https://git.kernel.org/stable/c/6f74989f5909cdec9b1274641f0fa306b15bb476 - Patch | |
| References | () https://git.kernel.org/stable/c/b18f3b60b35a8c01c9a2a0f0d6424c6d73971dc3 - Patch |
Information
Published : 2024-05-17 14:15
Updated : 2025-09-19 14:26
NVD link : CVE-2023-52668
Mitre link : CVE-2023-52668
CVE.ORG link : CVE-2023-52668
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-667
Improper Locking