CVE-2022-49889

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Check for NULL cpubuffer in ringbufferwakewaiters On some machines the number of listed CPUs may be bigger than the actual CPUs that exist. The tracing subsystem allocates a percpu directory with access to the per CP...

CVE-2022-49889

In CVE-2022-49889, the Linux kernel ring-buffer wake path could dereference a NULL or invalid buffer when waking waiters during ring-buffer shutdown on systems where listed CPUs > online CPUs. The fix adds a NULL check for the buffer and validates the allocation against online CPUs; it also no...