5.15-stable review patch. If anyone has any objections, please let me know.

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From: Nathan Chancellor nathan@kernel.org

commit 2b81082ad37cc3f28355fb73a6a69b91ff7dbf20 upstream.

Commit 2f13daee2a72 ("lib/crypto/curve25519-hacl64: Disable KASAN with clang-17 and older") inadvertently disabled KASAN in curve25519-hacl64.o for GCC unconditionally because clang-min-version will always evaluate to nothing for GCC. Add a check for CONFIG_CC_IS_CLANG to avoid applying the workaround for GCC, which is only needed for clang-17 and older.

Cc: stable@vger.kernel.org Fixes: 2f13daee2a72 ("lib/crypto/curve25519-hacl64: Disable KASAN with clang-17 and older") Signed-off-by: Nathan Chancellor nathan@kernel.org Acked-by: Ard Biesheuvel ardb@kernel.org Link: https://lore.kernel.org/r/20251103-curve25519-hacl64-fix-kasan-workaround-v2... Signed-off-by: Eric Biggers ebiggers@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- lib/crypto/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/crypto/Makefile +++ b/lib/crypto/Makefile @@ -23,7 +23,7 @@ libcurve25519-generic-y := curve25519 libcurve25519-generic-$(CONFIG_ARCH_SUPPORTS_INT128) := curve25519-hacl64.o libcurve25519-generic-y += curve25519-generic.o # clang versions prior to 18 may blow out the stack with KASAN -ifeq ($(call clang-min-version, 180000),) +ifeq ($(CONFIG_CC_IS_CLANG)_$(call clang-min-version, 180000),y_) KASAN_SANITIZE_curve25519-hacl64.o := n endif