CVE-2023-52498

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> PM: sleep: Fix possible deadlocks in core system-wide PM code<br /> <br /> It is reported that in low-memory situations the system-wide resume core<br /> code deadlocks, because async_schedule_dev() executes its argument<br /> function synchronously if it cannot allocate memory (and not only in<br /> that case) and that function attempts to acquire a mutex that is already<br /> held. Executing the argument function synchronously from within<br /> dpm_async_fn() may also be problematic for ordering reasons (it may<br /> cause a consumer device&amp;#39;s resume callback to be invoked before a<br /> requisite supplier device&amp;#39;s one, for example).<br /> <br /> Address this by changing the code in question to use<br /> async_schedule_dev_nocall() for scheduling the asynchronous<br /> execution of device suspend and resume functions and to directly<br /> run them synchronously if async_schedule_dev_nocall() returns false.