CVE-2022-49192

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drivers: ethernet: cpsw: fix panic when interrupt coaleceing is set via ethtool<br /> <br /> cpsw_ethtool_begin directly returns the result of pm_runtime_get_sync<br /> when successful.<br /> pm_runtime_get_sync returns -error code on failure and 0 on successful<br /> resume but also 1 when the device is already active. So the common case<br /> for cpsw_ethtool_begin is to return 1. That leads to inconsistent calls<br /> to pm_runtime_put in the call-chain so that pm_runtime_put is called<br /> one too many times and as result leaving the cpsw dev behind suspended.<br /> <br /> The suspended cpsw dev leads to an access violation later on by<br /> different parts of the cpsw driver.<br /> <br /> Fix this by calling the return-friendly pm_runtime_resume_and_get<br /> function.