> From: Mimi Zohar [mailto:zohar@xxxxxxxxxxxxx] > Sent: Friday, July 30, 2021 4:03 PM > Hi Roberto, > > On Fri, 2021-07-30 at 13:16 +0000, Roberto Sassu wrote: > > > From: Mimi Zohar [mailto:zohar@xxxxxxxxxxxxx] > > > Sent: Friday, July 30, 2021 2:40 PM > > > > "critical data", in this context, should probably be used for verifying > > > the in memory file digests and other state information haven't been > > > compromised. > > > > Actually, this is what we are doing currently. To keep the > > implementation simple, once the file or the buffer are uploaded > > to the kernel, they will not be modified, just accessed through > > the indexes. > > My main concern about digest lists is their integrity, from loading the > digest lists to their being stored in memory. A while back, there was > some work on defining a write once memory allocator. I don't recall > whatever happened to it. This would be a perfect usecase for that > memory allocator. Adding Igor in CC. Regarding loading, everything uploaded to the kernel is carefully evaluated. This should not be a concern. Regarding making them read-only, probably if you can subvert digest lists you can also remove the read-only protection (unless you use an hypervisor). Thanks Roberto HUAWEI TECHNOLOGIES Duesseldorf GmbH, HRB 56063 Managing Director: Li Peng, Li Jian, Shi Yanli > thanks, > > Mimi
