CVE-2024-56540

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> accel/ivpu: Prevent recovery invocation during probe and resume<br /> <br /> Refactor IPC send and receive functions to allow correct<br /> handling of operations that should not trigger a recovery process.<br /> <br /> Expose ivpu_send_receive_internal(), which is now utilized by the D0i3<br /> entry, DCT initialization, and HWS initialization functions.<br /> These functions have been modified to return error codes gracefully,<br /> rather than initiating recovery.<br /> <br /> The updated functions are invoked within ivpu_probe() and ivpu_resume(),<br /> ensuring that any errors encountered during these stages result in a proper<br /> teardown or shutdown sequence. The previous approach of triggering recovery<br /> within these functions could lead to a race condition, potentially causing<br /> undefined behavior and kernel crashes due to null pointer dereferences.