CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's ring buffer implementation, specifically in how the subbuffer size is handled during concurrent read operations. This flaw can lead to race conditions, potentially causing inconsistencies in data retrieval from the ring buffer, which may impact system stability and data integrity. Linux administrators and developers working with kernel-level applications should prioritize this issue to ensure the reliability of their systems.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix subbuf resize race with ring buffer readers trace_buffer subbuf_size is read lockless in ring_buffer_read_page() and ring_buffer_read_start(), while it can simultaneously be resized with ring_buffer_subbuf_order_set(). Instead of trace_buffer::subbuf_size, use bpage::order in ring_buffer_read_start() and ring_buffer_read_page(). In ring_buffer_read_start(), even with resize_disabled, there is still a possibility of a race with a buffer modification. Hold the trace_buffer mutex to synchronise with any pending ring buffer order modification. trace_buffer::subbuf_size is now actually useless, remove it. Also, create accessors rb_subbuf_capacity() and rb_page_capacity() which return the actual size available for storing events, while rb_subbuf_size() returns the actual subbuf page-size.