Re: [PATCH v2] crypto: ecc - Unbreak the build on arm with CONFIG_KASAN_STACK=y

[Lukas Wunner]

On Wed, May 06, 2026 at 04:42:25PM +0300, Andy Shevchenko wrote:
> On Wed, May 06, 2026 at 03:27:49PM +0200, Lukas Wunner wrote:
> > A longterm solution is to refactor ecc.c for reduced stack usage.  It
> > currently performs ECC point multiplication with a Montgomery ladder
> > which uses co-Z (conjugate) addition to trade off memory for speed.
> > The algorithm is susceptible to timing attacks and needs to be replaced
> > with a constant time Montgomery ladder, which should consume less memory
> > and thus resolve the stack usage issue as a side effect.
[...]
> > +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124949
> 
> Perhaps also mention the algo change as that one sounds to me even more
> critical than this issue per se.

Hm, but it's already mentioned above in the commit message?