On Sat, May 20, 2023 at 10:12:40AM +0100, Lorenzo Stoakes wrote: > > No, this returning 0 on failure is a foot gun. Failing to pin a single > > page is always an error, the only question is what sub reason caused > > the error to happen. There is no third case where it is not an error. > > The uprobe path thinks otherwise, but maybe the answer is that we just need > to -EFAULT on missing VMA and -EPERM on invalid flags. I think uprobe is just broken to think there is a third outcome. Let's just fix it instead of trying to pretend it makes sense. Jason
