> From: Nicolin Chen <nicolinc@xxxxxxxxxx> > Sent: Thursday, May 8, 2025 11:50 AM > > On Wed, May 07, 2025 at 07:08:09PM -0300, Jason Gunthorpe wrote: > > On Wed, May 07, 2025 at 02:09:31PM -0700, Nicolin Chen wrote: > > > I have another question: while I don't think my code is handling > > > this well either, how should we validate the input address is an > > > allowed one? > > > > The pgoff to mmap? If it isn't in the maple tree it is not allowed, if > > it isn't at the start of range it is not allowed, if the size is not > > exactly the same as the range it is not allowed. > > Kevin suggested to allow a partial mmap, i.e allow the size to be > smaller than what the cookie describes. Yet, surely the mmap size > should not above the allocated size. > let me clarify - I didn't suggested it. Instead it's what the code does hence I suggested to make it explicit. 😊
