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Fri, 12 Jul 2024 04:37:03 -0700 (PDT) Received: from FLYINGPENG-MB1.tencent.com ([103.7.29.30]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1fbb6ac35e7sm65079545ad.223.2024.07.12.04.37.01 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 12 Jul 2024 04:37:02 -0700 (PDT) From: flyingpenghao@gmail.com X-Google-Original-From: flyingpeng@tencent.com To: herbert@gondor.apana.org.au, davem@davemloft.net Cc: linux-crypto@vger.kernel.org, Peng Hao Subject: [PATCH] crypto/ecc: increase frame warning limit Date: Fri, 12 Jul 2024 19:36:56 +0800 Message-Id: <20240712113656.30422-1-flyingpeng@tencent.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Peng Hao When building kernel with clang, which will typically have sanitizers enabled, there is a warning about a large stack frame. crypto/ecc.c:1129:13: error: stack frame size (2136) exceeds limit (2048) in 'ecc_point_double_jacobian' [-Werror,-Wframe-larger-than] static void ecc_point_double_jacobian(u64 *x1, u64 *y1, u64 *z1, ^ Since many arrays are defined in ecc_point_double_jacobian, they occupy a lot of stack space, but are difficult to adjust. just increase the limit for configurations that have KASAN or KCSAN enabled. Signed-off-by: Peng Hao --- crypto/Makefile | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/crypto/Makefile b/crypto/Makefile index edbbaa3ffef5..ab7bebaa7218 100644 --- a/crypto/Makefile +++ b/crypto/Makefile @@ -190,6 +190,12 @@ obj-$(CONFIG_CRYPTO_ECC) += ecc.o obj-$(CONFIG_CRYPTO_ESSIV) += essiv.o obj-$(CONFIG_CRYPTO_CURVE25519) += curve25519-generic.o +ifneq ($(CONFIG_FRAME_WARN),0) +ifeq ($(filter y,$(CONFIG_KASAN)$(CONFIG_KCSAN)),y) +CFLAGS_ecc.o = -Wframe-larger-than=2776 +endif +endif + ecdh_generic-y += ecdh.o ecdh_generic-y += ecdh_helper.o obj-$(CONFIG_CRYPTO_ECDH) += ecdh_generic.o