The patch below does not apply to the 6.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.15.y git checkout FETCH_HEAD git cherry-pick -x bc8169003b41e89fe7052e408cf9fdbecb4017fe # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025062040-slinging-salvaging-1638@gregkh' --subject-prefix 'PATCH 6.15.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From bc8169003b41e89fe7052e408cf9fdbecb4017fe Mon Sep 17 00:00:00 2001 From: Eric Biggers ebiggers@google.com Date: Tue, 20 May 2025 10:39:29 +0800 Subject: [PATCH] crypto: powerpc/poly1305 - add depends on BROKEN for now

As discussed in the thread containing https://lore.kernel.org/linux-crypto/20250510053308.GB505731@sol/, 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 ebiggers@google.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au

diff --git a/arch/powerpc/lib/crypto/Kconfig b/arch/powerpc/lib/crypto/Kconfig index ffa541ad6d5d..3f9e1bbd9905 100644 --- a/arch/powerpc/lib/crypto/Kconfig +++ b/arch/powerpc/lib/crypto/Kconfig @@ -10,6 +10,7 @@ config CRYPTO_CHACHA20_P10 config CRYPTO_POLY1305_P10 tristate depends on PPC64 && CPU_LITTLE_ENDIAN && VSX + depends on BROKEN # Needs to be fixed to work in softirq context default CRYPTO_LIB_POLY1305 select CRYPTO_ARCH_HAVE_LIB_POLY1305 select CRYPTO_LIB_POLY1305_GENERIC