Messages in this thread | | | From | "Jason A. Donenfeld" <> | Date | Wed, 2 Mar 2022 12:44:45 +0100 | Subject | Re: [PATCH 3/3] wireguard: device: clear keys on VM fork |
| |
Hi Michael,
On Wed, Mar 2, 2022 at 9:36 AM Michael S. Tsirkin <mst@redhat.com> wrote: > Catastrophic cryptographic failure sounds bad :( > So in another thread we discussed that there's a race with this > approach, and we don't know how big it is. Question is how expensive > it would be to fix it properly checking for fork after every use of > key+nonce and before transmitting it. I did a quick microbenchmark > and it did not seem too bad - care posting some numbers?
I followed up in that thread, which is a larger one, so it might be easiest to keep discussion there. My response to you here is the same as it was over there. :)
https://lore.kernel.org/lkml/CAHmME9pf-bjnZuweoLqoFEmPy1OK7ogEgGEAva1T8uVTufhCuw@mail.gmail.com/
Jason
| |