[$] A review of file descriptor memory safety in the kernel

On July 30, Al Viro senta patch set to the linux-fsdevel mailing list with acomprehensive cover letter explaining hisrecent work on ensuring that the kernel's internal representation offile descriptors are used correctly in the kernel.File descriptors are ubiquitous; many system callsneed to handle them. Viro's reviewidentified a few existing bugs, and may prevent more in the future. He also hadsuggestions for ways to keep uses consistent throughout the kernel.