CVE-2022-50322

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> rtc: msc313: Fix function prototype mismatch in msc313_rtc_probe()<br /> <br /> With clang&amp;#39;s kernel control flow integrity (kCFI, CONFIG_CFI_CLANG),<br /> indirect call targets are validated against the expected function<br /> pointer prototype to make sure the call target is valid to help mitigate<br /> ROP attacks. If they are not identical, there is a failure at run time,<br /> which manifests as either a kernel panic or thread getting killed.<br /> <br /> msc313_rtc_probe() was passing clk_disable_unprepare() directly, which<br /> did not have matching prototypes for devm_add_action_or_reset()&amp;#39;s<br /> callback argument. Refactor to use devm_clk_get_enabled() instead.<br /> <br /> This was found as a result of Clang&amp;#39;s new -Wcast-function-type-strict<br /> flag, which is more sensitive than the simpler -Wcast-function-type,<br /> which only checks for type width mismatches.