Linux Kernel User-Page Management Vulnerability in accel/qaic Component

A vulnerability has been identified in the Linux kernel's accel/qaic component, specifically in the user-page management process. When the function get_user_pages_fast() successfully allocates some pages but fewer than expected, the current implementation fails to properly release the excess pages, leading to a memory leak. This issue has been addressed by modifying the code to include a call to put_page() for the leaked pages before exiting the function.

Impact

Exploitation of this vulnerability could result in a memory leak, where allocated pages are not properly released, potentially leading to increased memory usage and degradation of system performance.