CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's nvmet-tcp component, where a page fragment cache leak occurs if a connection is closed during the allocation process. This flaw can lead to memory exhaustion over time as failed connection attempts accumulate unfreed page fragments. Organizations using Linux systems that rely on nvmet-tcp should prioritize addressing this issue to prevent potential resource depletion and ensure system stability.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: fix page fragment cache leak in error path In nvmet_tcp_alloc_queue(), when a connection is closed during the allocation process (e.g., nvmet_tcp_set_queue_sock() returns -ENOTCONN), the error handling jumps to out_destroy_sq and then to out_ida_remove without draining the page fragment cache. Although nvmet_tcp_free_cmd() is called in some error paths to release individual page fragments, the underlying page cache reference held by queue->pf_cache is never released. The first allocation using pf_cache is the call to nvmet_tcp_alloc_cmd() for queue->connect, which happens after ida_alloc() returns successfully. This results in a page leak each time a connection fails during allocation, which could lead to memory exhaustion over time if connections are repeatedly opened and closed. Fix this by calling page_frag_cache_drain() before freeing the queue structure in the out_ida_remove label.