Description
In the Linux kernel, the following vulnerability has been resolved: pmdomain: core: Fix detach procedure for virtual devices in genpd If a device is attached to a PM domain through genpd_dev_pm_attach_by_id(), genpd calls pm_runtime_enable() for the corresponding virtual device that it registers. While this avoids boilerplate code in drivers, there is no corresponding call to pm_runtime_disable() in genpd_dev_pm_detach(). This means these virtual devices are typically detached from its genpd, while runtime PM remains enabled for them, which is not how things are designed to work. In worst cases it may lead to critical errors, like a NULL pointer dereference bug in genpd_runtime_suspend(), which was recently reported. For another case, we may end up keeping an unnecessary vote for a performance state for the device. To fix these problems, let's add this missing call to pm_runtime_disable() in genpd_dev_pm_detach().
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
3c095f32a92be4d07f3172a777dab1aacdb6a728 to < e8f8dad44f024a5c99e54a48ad5c943fa8e54319affected3c095f32a92be4d07f3172a777dab1aacdb6a728 to < 98b8104978474d381256a2b2fb0e7ca8e05a7bfaaffected3c095f32a92be4d07f3172a777dab1aacdb6a728 to < 52e485ed0dcb5496864003ba9ffcef7d5b613f83affected3c095f32a92be4d07f3172a777dab1aacdb6a728 to < 707cb5df3eab32ddc52979418f7ace62941e6381affected3c095f32a92be4d07f3172a777dab1aacdb6a728 to < 361518a26e4434e879db6ff43bf364795dcbfbffaffected3c095f32a92be4d07f3172a777dab1aacdb6a728 to < 51a7dd9cbae9210335ce398642ecaaa52c939eb5affected3c095f32a92be4d07f3172a777dab1aacdb6a728 to < 8d44391a7f29e4601e8243f13498d0219bab2576affected3c095f32a92be4d07f3172a777dab1aacdb6a728 to < 26735dfdd8930d9ef1fa92e590a9bf77726efdf6affected
Linux Linux
Default version status: affected
4.18affected0 to < 4.18unaffected5.10.259 to ≤ 5.10.*unaffected5.15.210 to ≤ 5.15.*unaffected6.1.176 to ≤ 6.1.*unaffected6.6.141 to ≤ 6.6.*unaffected6.12.88 to ≤ 6.12.*unaffected6.18.30 to ≤ 6.18.*unaffected7.0.7 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/e8f8dad44f024a5c99e54a48ad5c943fa8e54319 ↗
- https://git.kernel.org/stable/c/98b8104978474d381256a2b2fb0e7ca8e05a7bfa ↗
- https://git.kernel.org/stable/c/52e485ed0dcb5496864003ba9ffcef7d5b613f83 ↗
- https://git.kernel.org/stable/c/707cb5df3eab32ddc52979418f7ace62941e6381 ↗
- https://git.kernel.org/stable/c/361518a26e4434e879db6ff43bf364795dcbfbff ↗
- https://git.kernel.org/stable/c/51a7dd9cbae9210335ce398642ecaaa52c939eb5 ↗
- https://git.kernel.org/stable/c/8d44391a7f29e4601e8243f13498d0219bab2576 ↗
- https://git.kernel.org/stable/c/26735dfdd8930d9ef1fa92e590a9bf77726efdf6 ↗