Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: cpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request() The cpufreq_cpu_put() call in update_qos_request() takes place too early because the latter subsequently calls freq_qos_update_request() that indirectly accesses the policy object in question through the QoS request object passed to it. Fortunately, update_qos_request() is called under intel_pstate_driver_lock, so this issue does not matter for changing the intel_pstate operation mode, but it theoretically can cause a crash to occur on CPU device hot removal (which currently can only happen in virt, but it is formally supported nevertheless). Address this issue by modifying update_qos_request() to drop the reference to the policy later.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected da5c504c7aae96db68c4b38e2564a88e91842d89 before 15ac9579ebdaf22a37d7f60b3a8efc1029732ef9; affected da5c504c7aae96db68c4b38e2564a88e91842d89 before bc26564bcc659beb6d977cd6eb394041ec2f2851; affected da5c504c7aae96db68c4b38e2564a88e91842d89 before ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4; affected da5c504c7aae96db68c4b38e2564a88e91842d89 before 0a58d3e77b22b087a57831c87cafd360e144a5bd; affected da5c504c7aae96db68c4b38e2564a88e91842d89 before 69a18ff6c60e8e113420f15355fad862cb45d38e; affected da5c504c7aae96db68c4b38e2564a88e91842d89 before ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3; affected da5c504c7aae96db68c4b38e2564a88e91842d89 before 57e4a6aadf12578b96a038373cffd54b3a58b092; affected da5c504c7aae96db68c4b38e2564a88e91842d89 before 69e5d50fcf4093fb3f9f41c4f931f12c2ca8c467 |
| Linux / Linux | affected 5.4; unaffected 0 before 5.4; unaffected 5.4.301 through 5.4.*; unaffected 5.10.246 through 5.10.*; unaffected 5.15.195 through 5.15.*; unaffected 6.1.157 through 6.1.*; unaffected 6.6.113 through 6.6.*; unaffected 6.12.54 through 6.12.*; unaffected 6.17.4 through 6.17.*; unaffected 6.18 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/15ac9579ebdaf22a37d7f60b3a8efc1029732ef9
- https://git.kernel.org/stable/c/bc26564bcc659beb6d977cd6eb394041ec2f2851
- https://git.kernel.org/stable/c/ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4
- https://git.kernel.org/stable/c/0a58d3e77b22b087a57831c87cafd360e144a5bd
- https://git.kernel.org/stable/c/69a18ff6c60e8e113420f15355fad862cb45d38e
- https://git.kernel.org/stable/c/ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3
- https://git.kernel.org/stable/c/57e4a6aadf12578b96a038373cffd54b3a58b092
- https://git.kernel.org/stable/c/69e5d50fcf4093fb3f9f41c4f931f12c2ca8c467