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From:   Eric Biggers <ebiggers@kernel.org>
To:     linux-crypto@vger.kernel.org
Cc:     x86@kernel.org, linux-arm-kernel@lists.infradead.org,
        Sami Tolvanen <samitolvanen@google.com>
Subject: [PATCH 09/11] crypto: arm64/sm3 - fix possible crash with CFI enabled
Date:   Fri, 18 Nov 2022 01:02:18 -0800
Message-Id: <20221118090220.398819-10-ebiggers@kernel.org>
In-Reply-To: <20221118090220.398819-1-ebiggers@kernel.org>
References: <20221118090220.398819-1-ebiggers@kernel.org>
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From: Eric Biggers <ebiggers@google.com>

sm3_neon_transform() is called via indirect function calls.  This
function needs to use SYM_TYPED_FUNC_START instead of SYM_FUNC_START to
cause type hashes to be emitted when the kernel is built with
CONFIG_CFI_CLANG=y.  Otherwise, the code crashes with a CFI failure (if
the compiler didn't happen to optimize out the indirect call).

Fixes: c50d32859e70 ("arm64: Add types to indirect called assembly functions")
Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 arch/arm64/crypto/sm3-neon-core.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/crypto/sm3-neon-core.S b/arch/arm64/crypto/sm3-neon-core.S
index 3e3b4e5c736fc..8abea1d39ddd9 100644
--- a/arch/arm64/crypto/sm3-neon-core.S
+++ b/arch/arm64/crypto/sm3-neon-core.S
@@ -9,7 +9,7 @@
  */
 
 #include <linux/linkage.h>
-#include <asm/assembler.h>
+#include <linux/cfi_types.h>
 
 /* Context structure */
 
@@ -351,7 +351,7 @@
 	 */
 	.text
 .align 3
-SYM_FUNC_START(sm3_neon_transform)
+SYM_TYPED_FUNC_START(sm3_neon_transform)
 	ldp		ra, rb, [RSTATE, #0]
 	ldp		rc, rd, [RSTATE, #8]
 	ldp		re, rf, [RSTATE, #16]
-- 
2.38.1