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THREATINT
PUBLISHED

CVE-2024-27002

clk: mediatek: Do a runtime PM get on controllers during probe

Reserved:2024-02-19
Published:2024-05-01
Updated:2024-05-13

Description

In the Linux kernel, the following vulnerability has been resolved: clk: mediatek: Do a runtime PM get on controllers during probe mt8183-mfgcfg has a mutual dependency with genpd during the probing stage, which leads to a deadlock in the following call stack: CPU0: genpd_lock --> clk_prepare_lock genpd_power_off_work_fn() genpd_lock() generic_pm_domain::power_off() clk_unprepare() clk_prepare_lock() CPU1: clk_prepare_lock --> genpd_lock clk_register() __clk_core_init() clk_prepare_lock() clk_pm_runtime_get() genpd_lock() Do a runtime PM get at the probe function to make sure clk_register() won't acquire the genpd lock. Instead of only modifying mt8183-mfgcfg, do this on all mediatek clock controller probings because we don't believe this would cause any regression. Verified on MT8183 and MT8192 Chromebooks.

Product status

Default status
unaffected

acddfc2c261b before 165d22647257
affected

acddfc2c261b before c0dcd5c072e2
affected

acddfc2c261b before b62ed25feb34
affected

acddfc2c261b before 2f7b1d8b5505
affected

Default status
affected

5.2
affected

Any version before 5.2
unaffected

6.1.88
unaffected

6.6.29
unaffected

6.8.8
unaffected

6.9
unaffected

References

https://git.kernel.org/stable/c/165d226472575b213dd90dfda19d1605dd7c19a8

https://git.kernel.org/stable/c/c0dcd5c072e2a3fff886f673e6a5d9bf8090c4cc

https://git.kernel.org/stable/c/b62ed25feb342eab052822eff0c554873799a4f5

https://git.kernel.org/stable/c/2f7b1d8b5505efb0057cd1ab85fca206063ea4c3

cve.org CVE-2024-27002

nvd.nist.gov CVE-2024-27002

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