Description
In the Linux kernel, the following vulnerability has been resolved: cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path When kobject_init_and_add() fails, cpufreq_dbs_governor_init() calls kobject_put(&dbs_data->attr_set.kobj). The kobject release callback cpufreq_dbs_data_release() calls gov->exit(dbs_data) and kfree(dbs_data), but the current error path then calls gov->exit(dbs_data) and kfree(dbs_data) again, causing a double free. Keep the direct kfree(dbs_data) for the gov->init() failure path, but after kobject_init_and_add() has been called, let kobject_put() handle the cleanup through cpufreq_dbs_data_release().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
4ebe36c94aed95de71a8ce6a6762226d31c938ee to < 56bc91ee78babe9578585a2bc137abc4b3115ff3affected4ebe36c94aed95de71a8ce6a6762226d31c938ee to < 4b9118e93d2499bb2808ef3742fa0ce06f4f8117affected4ebe36c94aed95de71a8ce6a6762226d31c938ee to < 019ea28629720c220daedf38107c8787f330dc05affected4ebe36c94aed95de71a8ce6a6762226d31c938ee to < da39ee627fd82b52068d4d5f115749a8b7d271f9affected4ebe36c94aed95de71a8ce6a6762226d31c938ee to < 427d048e4f6acbfa01b5a8062449fe0ee8987c0daffected4ebe36c94aed95de71a8ce6a6762226d31c938ee to < d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357affected4ebe36c94aed95de71a8ce6a6762226d31c938ee to < 3bf9d023d2329a0e5379f2fd09d06ef09729cd9daffected4ebe36c94aed95de71a8ce6a6762226d31c938ee to < 6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1eaffectede977b1477a6725868302957e6b5c330220391797affected5.1.6 to < 5.2affected
Linux Linux
Default version status: affected
5.2affected0 to < 5.2unaffected5.10.253 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.168 to ≤ 6.1.*unaffected6.6.134 to ≤ 6.6.*unaffected6.12.81 to ≤ 6.12.*unaffected6.18.22 to ≤ 6.18.*unaffected6.19.12 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/56bc91ee78babe9578585a2bc137abc4b3115ff3 ↗
- https://git.kernel.org/stable/c/4b9118e93d2499bb2808ef3742fa0ce06f4f8117 ↗
- https://git.kernel.org/stable/c/019ea28629720c220daedf38107c8787f330dc05 ↗
- https://git.kernel.org/stable/c/da39ee627fd82b52068d4d5f115749a8b7d271f9 ↗
- https://git.kernel.org/stable/c/427d048e4f6acbfa01b5a8062449fe0ee8987c0d ↗
- https://git.kernel.org/stable/c/d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357 ↗
- https://git.kernel.org/stable/c/3bf9d023d2329a0e5379f2fd09d06ef09729cd9d ↗
- https://git.kernel.org/stable/c/6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e ↗