Re: Doing crypto in small stack buffers (bluetooth vs vmalloc-stack crash, etc)

On Wed, Jun 22, 2016 at 11:41 PM, Herbert Xu
[off-list ref] wrote:

On Thu, Jun 23, 2016 at 11:48:25AM +0800, Herbert Xu wrote:

quoted

No we never had such an API in the kernel.  However, I see that
rxkad does some pretty silly things and we should be able to avoid
using the stack in pretty much all cases.  Let me try to come up with
something.

Here it is:

---8<---
Subject: rxrpc: Avoid using stack memory in SG lists in rxkad

Looks reasonable to me.  Unless anyone tells me otherwise, my plan is
to queue it in my virtually-mapped stack series and to ask Ingo to
apply it via -tip.

If it went in via the networking tree, that would work as well, but it
would introduce a bisectability problem.

Thanks!

--Andy