CVE-2024-27002: clk: mediatek: Do a runtime PM get on controllers during probe

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.

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

acddfc2c261b3653ab1c1b567a427299bac20d31 to < 165d226472575b213dd90dfda19d1605dd7c19a8affected
acddfc2c261b3653ab1c1b567a427299bac20d31 to < c0dcd5c072e2a3fff886f673e6a5d9bf8090c4ccaffected
acddfc2c261b3653ab1c1b567a427299bac20d31 to < b62ed25feb342eab052822eff0c554873799a4f5affected
acddfc2c261b3653ab1c1b567a427299bac20d31 to < 2f7b1d8b5505efb0057cd1ab85fca206063ea4c3affected

Linux Linux

Default version status: affected

5.2affected
0 to < 5.2unaffected
6.1.88 to ≤ 6.1.*unaffected
6.6.29 to ≤ 6.6.*unaffected
6.8.8 to ≤ 6.8.*unaffected
6.9 to ≤ *unaffected

CVE-2024-27002

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

Description

Affected products

Linux Linux

Linux Linux

References