Linux Kernel virtio_net Memory Leak Vulnerability in XDP_TX

A memory leak vulnerability has been identified in the Linux kernel's virtio_net component, specifically within the XDP_TX path. The issue arises when the function xdp_convert_buff_to_frame() is called to retrieve the xdpf. If this function returns NULL, there should be a check to determine if the xdp_page was allocated by xdp_linearize_page(). If it was newly allocated, it needs to be freed, similar to the existing error handling for 'goto err_xdp'.

Impact

Exploitation of this vulnerability leads to a memory leak, where allocated memory is not properly freed, potentially causing increased memory usage and degradation of system performance over time.