CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's simple ring buffer implementation, specifically in the `simple_ring_buffer_swap_reader_page()` function, where improper handling of retry attempts can lead to corrupted ring buffer states. This flaw may result in inconsistent reader bookkeeping, potentially causing data integrity issues during concurrent operations. Organizations utilizing the Linux kernel, particularly those relying on tracing and logging functionalities, should prioritize addressing this vulnerability to maintain system stability and data accuracy.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix retry exhaustion in simple ring buffer reader swap simple_ring_buffer_swap_reader_page() starts with retry set to 8 and post-decrements it only after a failed link replacement. On the final attempt, a successful replacement leaves retry at zero, while a failed replacement leaves it at -1. The current !retry test reverses both outcomes. It returns an error after a successful final replacement, leaving the link update complete but the reader bookkeeping unfinished. After a failed final replacement, it falls through and updates the head and reader pointers as though the replacement succeeded, which can corrupt the ring. Treat only a negative counter as exhaustion and return the documented -EBUSY error.