Thanks, Alan. I figured that was the case, but it's good to get confirmation from someone who knows. On Sat, 2008-08-16 at 09:37 +0100, Alan Cox wrote: > On Fri, 15 Aug 2008 22:22:16 +0000 > Wayne Feick <waf@xxxxxxxxx> wrote: > > > I'd consider it a security bug to allow a user to see any bytes beyond > > what was written to the file since: > > > > 1. Some ilesystems store multiple small files in the same block. > > 2. Some (most?) filesystems don't zero out blocks when they are > > reallocated. > > > > Either of the above could allow you to see things you shouldn't. > > Which is why the kernel won't let you. What is on disk may vary but the > actual kernel interfaces deal with actual file sizes. Any holes you > create when extending it contain zeros -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
