CVE-2025-39816 io_uring/kbuf: always use READ_ONCE() to read ring provided buffer lengths

In the Linux kernel, the following vulnerability has been resolved: iouring/kbuf: always use READONCE to read ring provided buffer lengths Since the buffers are mapped from userspace, it is prudent to use READONCE to read the value into a local variable, and use that for any other actions taken...