CVE-2024-35879: of: dynamic: Synchronize of_changeset_destroy() with the devlink removals
First published: Sun May 19 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: of: dynamic: Synchronize of_changeset_destroy() with the devlink removals In the following sequence: 1) of_platform_depopulate() 2) of_overlay_remove() During the step 1, devices are destroyed and devlinks are removed. During the step 2, OF nodes are destroyed but __of_changeset_entry_destroy() can raise warnings related to missing of_node_put(): ERROR: memory leak, expected refcount 1 instead of 2 ... Indeed, during the devlink removals performed at step 1, the removal itself releasing the device (and the attached of_node) is done by a job queued in a workqueue and so, it is done asynchronously with respect to function calls. When the warning is present, of_node_put() will be called but wrongly too late from the workqueue job. In order to be sure that any ongoing devlink removals are done before the of_node destruction, synchronize the of_changeset_destroy() with the devlink removals.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- https://git.kernel.org/stable/c/3127b2ee50c424a96eb3559fbb7b43cf0b111c7a
- https://git.kernel.org/stable/c/3ee2424107546d882e1ddd75333ca9c32879908c
- https://git.kernel.org/stable/c/7b6df050c45a1ea158fd50bc32a8e1447dd1e951
- https://git.kernel.org/stable/c/801c8b8ec5bfb3519566dff16a5ecd48302fca82
- https://git.kernel.org/stable/c/8917e7385346bd6584890ed362985c219fe6ae84
- https://git.kernel.org/stable/c/ae6d76e4f06c37a623e357e79d49b17411db6f5c
- https://launchpad.net/bugs/cve/CVE-2024-35879
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-35879
- https://nvd.nist.gov/vuln/detail/CVE-2024-35879
- https://security-tracker.debian.org/tracker/CVE-2024-35879
- https://ubuntu.com/security/CVE-2024-35879
- https://git.kernel.org/linus/8917e7385346bd6584890ed362985c219fe6ae84
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