CVE-2023-52668 (GCVE-0-2023-52668)

Vulnerability from cvelistv5 – Published: 2024-05-17 14:01 – Updated: 2025-05-04 07:41
VLAI?
Title
btrfs: zoned: fix lock ordering in btrfs_zone_activate()
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a7e1ac7bdc5af91af2d52e6269fdbd92fe9ee353 , < 6f74989f5909cdec9b1274641f0fa306b15bb476 (git)
Affected: a7e1ac7bdc5af91af2d52e6269fdbd92fe9ee353 , < 1908e9d01e5395adff68d9d308a0fb15337e6272 (git)
Affected: a7e1ac7bdc5af91af2d52e6269fdbd92fe9ee353 , < b18f3b60b35a8c01c9a2a0f0d6424c6d73971dc3 (git)
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    Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.15 , ≤ 6.6.* (semver)
Unaffected: 6.7.3 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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