On Wed, May 14, 2025 at 05:41:39PM +0800, Herbert Xu wrote:

Eric Biggers [off-list ref] wrote:

quoted

From: Eric Biggers <redacted>

As discussed in the thread containing
https://lore.kernel.org/linux-crypto/20250510053308.GB505731@sol/ (local), the
Power10-optimized Poly1305 code is currently not safe to call in softirq
context.  Disable it for now.  It can be re-enabled once it is fixed.

Fixes: ba8f8624fde2 ("crypto: poly1305-p10 - Glue code for optmized Poly1305 implementation for ppc64le")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <redacted>
---
arch/powerpc/lib/crypto/Kconfig | 1 +
1 file changed, 1 insertion(+)

I thought this fix should be enough, no?

https://patchwork.kernel.org/project/linux-crypto/patch/aB8Yy0JGvoErc0ns@gondor.apana.org.au/

I didn't notice that.  Probably, though I don't have time to review this subtle
Poly1305 code.  Especially with all the weird unions in the code.  Would be
great if the PowerPC folks would take a look.

- Eric