CVE-2024-49966: ocfs2: cancel dqi_sync_work before freeing oinfo

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-21 · updated 2026-08-04
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: cancel dqi_sync_work before freeing oinfo ocfs2_global_read_info() will initialize and schedule dqi_sync_work at the end, if error occurs after successfully reading global quota, it will trigger the following warning with CONFIG_DEBUG_OBJECTS_* enabled: ODEBUG: free active (active state 0) object: 00000000d8b0ce28 object type: timer_list hint: qsync_work_fn+0x0/0x16c This reports that there is an active delayed work when freeing oinfo in error handling, so cancel dqi_sync_work first. BTW, return status instead of -1 when .read_file_info fails.

Affected products

Debian Linux: 11.0
Linux kernel: from 2.6.29 before 4.19.323; from 4.20 before 5.4.285; from 5.5 before 5.10.227; from 5.11 before 5.15.168; from 5.16 before 6.1.113; from 6.2 before 6.6.55 — fixed in 4.19.323, 5.10.227, 5.15.168, 5.4.285, 6.1.113, 6.10.14

How to fix

Upgrade to a fixed version: Linux kernel 4.19.323, 5.10.227, 5.15.168, 5.4.285. Check the vendor advisory for mitigations.

References

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