On Wed, Dec 02, 2020 at 06:22:00PM +0200, Jarkko Sakkinen wrote: > Initialize "ret" to zero as otherwise a zero length address range will > leave it uninitialized. That length is: * @length: length of the data (multiple of the page size) I think we wanna fail this even earlier when it wants to add data of length 0 because that sounds nonsensical to me. Or is there some use case for zero-length data? Btw, pls CC lkml on patch submissions. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette