[PATCH] crypto: arm64/sha: fix function types

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Declare assembly functions with the expected function type
instead of casting pointers in C to avoid type mismatch failures
with Control-Flow Integrity (CFI) checking.

Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx>
---
 arch/arm64/crypto/sha1-ce-glue.c   | 12 +++++-------
 arch/arm64/crypto/sha2-ce-glue.c   | 26 +++++++++++---------------
 arch/arm64/crypto/sha256-glue.c    | 30 ++++++++++++------------------
 arch/arm64/crypto/sha512-ce-glue.c | 23 ++++++++++-------------
 arch/arm64/crypto/sha512-glue.c    | 13 +++++--------
 5 files changed, 43 insertions(+), 61 deletions(-)

diff --git a/arch/arm64/crypto/sha1-ce-glue.c b/arch/arm64/crypto/sha1-ce-glue.c
index bdc1b6d7aff7..3153a9bbb683 100644
--- a/arch/arm64/crypto/sha1-ce-glue.c
+++ b/arch/arm64/crypto/sha1-ce-glue.c
@@ -25,7 +25,7 @@ struct sha1_ce_state {
 	u32			finalize;
 };
 
-asmlinkage void sha1_ce_transform(struct sha1_ce_state *sst, u8 const *src,
+asmlinkage void sha1_ce_transform(struct sha1_state *sst, u8 const *src,
 				  int blocks);
 
 const u32 sha1_ce_offsetof_count = offsetof(struct sha1_ce_state, sst.count);
@@ -41,8 +41,7 @@ static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
 
 	sctx->finalize = 0;
 	kernel_neon_begin();
-	sha1_base_do_update(desc, data, len,
-			    (sha1_block_fn *)sha1_ce_transform);
+	sha1_base_do_update(desc, data, len, sha1_ce_transform);
 	kernel_neon_end();
 
 	return 0;
@@ -64,10 +63,9 @@ static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
 	sctx->finalize = finalize;
 
 	kernel_neon_begin();
-	sha1_base_do_update(desc, data, len,
-			    (sha1_block_fn *)sha1_ce_transform);
+	sha1_base_do_update(desc, data, len, sha1_ce_transform);
 	if (!finalize)
-		sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_ce_transform);
+		sha1_base_do_finalize(desc, sha1_ce_transform);
 	kernel_neon_end();
 	return sha1_base_finish(desc, out);
 }
@@ -81,7 +79,7 @@ static int sha1_ce_final(struct shash_desc *desc, u8 *out)
 
 	sctx->finalize = 0;
 	kernel_neon_begin();
-	sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_ce_transform);
+	sha1_base_do_finalize(desc, sha1_ce_transform);
 	kernel_neon_end();
 	return sha1_base_finish(desc, out);
 }
diff --git a/arch/arm64/crypto/sha2-ce-glue.c b/arch/arm64/crypto/sha2-ce-glue.c
index 604a01a4ede6..a4dacedfe4d4 100644
--- a/arch/arm64/crypto/sha2-ce-glue.c
+++ b/arch/arm64/crypto/sha2-ce-glue.c
@@ -25,7 +25,7 @@ struct sha256_ce_state {
 	u32			finalize;
 };
 
-asmlinkage void sha2_ce_transform(struct sha256_ce_state *sst, u8 const *src,
+asmlinkage void sha2_ce_transform(struct sha256_state *sst, u8 const *src,
 				  int blocks);
 
 const u32 sha256_ce_offsetof_count = offsetof(struct sha256_ce_state,
@@ -33,7 +33,8 @@ const u32 sha256_ce_offsetof_count = offsetof(struct sha256_ce_state,
 const u32 sha256_ce_offsetof_finalize = offsetof(struct sha256_ce_state,
 						 finalize);
 
-asmlinkage void sha256_block_data_order(u32 *digest, u8 const *src, int blocks);
+asmlinkage void sha256_block_data_order(struct sha256_state *sst, u8 const *src,
+					int blocks);
 
 static int sha256_ce_update(struct shash_desc *desc, const u8 *data,
 			    unsigned int len)
@@ -42,12 +43,11 @@ static int sha256_ce_update(struct shash_desc *desc, const u8 *data,
 
 	if (!crypto_simd_usable())
 		return sha256_base_do_update(desc, data, len,
-				(sha256_block_fn *)sha256_block_data_order);
+				sha256_block_data_order);
 
 	sctx->finalize = 0;
 	kernel_neon_begin();
-	sha256_base_do_update(desc, data, len,
-			      (sha256_block_fn *)sha2_ce_transform);
+	sha256_base_do_update(desc, data, len, sha2_ce_transform);
 	kernel_neon_end();
 
 	return 0;
@@ -62,9 +62,8 @@ static int sha256_ce_finup(struct shash_desc *desc, const u8 *data,
 	if (!crypto_simd_usable()) {
 		if (len)
 			sha256_base_do_update(desc, data, len,
-				(sha256_block_fn *)sha256_block_data_order);
-		sha256_base_do_finalize(desc,
-				(sha256_block_fn *)sha256_block_data_order);
+				sha256_block_data_order);
+		sha256_base_do_finalize(desc, sha256_block_data_order);
 		return sha256_base_finish(desc, out);
 	}
 
@@ -75,11 +74,9 @@ static int sha256_ce_finup(struct shash_desc *desc, const u8 *data,
 	sctx->finalize = finalize;
 
 	kernel_neon_begin();
-	sha256_base_do_update(desc, data, len,
-			      (sha256_block_fn *)sha2_ce_transform);
+	sha256_base_do_update(desc, data, len, sha2_ce_transform);
 	if (!finalize)
-		sha256_base_do_finalize(desc,
-					(sha256_block_fn *)sha2_ce_transform);
+		sha256_base_do_finalize(desc, sha2_ce_transform);
 	kernel_neon_end();
 	return sha256_base_finish(desc, out);
 }
@@ -89,14 +86,13 @@ static int sha256_ce_final(struct shash_desc *desc, u8 *out)
 	struct sha256_ce_state *sctx = shash_desc_ctx(desc);
 
 	if (!crypto_simd_usable()) {
-		sha256_base_do_finalize(desc,
-				(sha256_block_fn *)sha256_block_data_order);
+		sha256_base_do_finalize(desc, sha256_block_data_order);
 		return sha256_base_finish(desc, out);
 	}
 
 	sctx->finalize = 0;
 	kernel_neon_begin();
-	sha256_base_do_finalize(desc, (sha256_block_fn *)sha2_ce_transform);
+	sha256_base_do_finalize(desc, sha2_ce_transform);
 	kernel_neon_end();
 	return sha256_base_finish(desc, out);
 }
diff --git a/arch/arm64/crypto/sha256-glue.c b/arch/arm64/crypto/sha256-glue.c
index e273faca924f..dac3157937ba 100644
--- a/arch/arm64/crypto/sha256-glue.c
+++ b/arch/arm64/crypto/sha256-glue.c
@@ -23,28 +23,25 @@ MODULE_LICENSE("GPL v2");
 MODULE_ALIAS_CRYPTO("sha224");
 MODULE_ALIAS_CRYPTO("sha256");
 
-asmlinkage void sha256_block_data_order(u32 *digest, const void *data,
-					unsigned int num_blks);
+asmlinkage void sha256_block_data_order(struct sha256_state *sst, u8 const *src,
+					int blocks);
 EXPORT_SYMBOL(sha256_block_data_order);
 
-asmlinkage void sha256_block_neon(u32 *digest, const void *data,
-				  unsigned int num_blks);
+asmlinkage void sha256_block_neon(struct sha256_state *sst, u8 const *src,
+				  int blocks);
 
 static int crypto_sha256_arm64_update(struct shash_desc *desc, const u8 *data,
 				      unsigned int len)
 {
-	return sha256_base_do_update(desc, data, len,
-				(sha256_block_fn *)sha256_block_data_order);
+	return sha256_base_do_update(desc, data, len, sha256_block_data_order);
 }
 
 static int crypto_sha256_arm64_finup(struct shash_desc *desc, const u8 *data,
 				     unsigned int len, u8 *out)
 {
 	if (len)
-		sha256_base_do_update(desc, data, len,
-				(sha256_block_fn *)sha256_block_data_order);
-	sha256_base_do_finalize(desc,
-				(sha256_block_fn *)sha256_block_data_order);
+		sha256_base_do_update(desc, data, len, sha256_block_data_order);
+	sha256_base_do_finalize(desc, sha256_block_data_order);
 
 	return sha256_base_finish(desc, out);
 }
@@ -87,7 +84,7 @@ static int sha256_update_neon(struct shash_desc *desc, const u8 *data,
 
 	if (!crypto_simd_usable())
 		return sha256_base_do_update(desc, data, len,
-				(sha256_block_fn *)sha256_block_data_order);
+				sha256_block_data_order);
 
 	while (len > 0) {
 		unsigned int chunk = len;
@@ -103,8 +100,7 @@ static int sha256_update_neon(struct shash_desc *desc, const u8 *data,
 				sctx->count % SHA256_BLOCK_SIZE;
 
 		kernel_neon_begin();
-		sha256_base_do_update(desc, data, chunk,
-				      (sha256_block_fn *)sha256_block_neon);
+		sha256_base_do_update(desc, data, chunk, sha256_block_neon);
 		kernel_neon_end();
 		data += chunk;
 		len -= chunk;
@@ -118,15 +114,13 @@ static int sha256_finup_neon(struct shash_desc *desc, const u8 *data,
 	if (!crypto_simd_usable()) {
 		if (len)
 			sha256_base_do_update(desc, data, len,
-				(sha256_block_fn *)sha256_block_data_order);
-		sha256_base_do_finalize(desc,
-				(sha256_block_fn *)sha256_block_data_order);
+				sha256_block_data_order);
+		sha256_base_do_finalize(desc, sha256_block_data_order);
 	} else {
 		if (len)
 			sha256_update_neon(desc, data, len);
 		kernel_neon_begin();
-		sha256_base_do_finalize(desc,
-				(sha256_block_fn *)sha256_block_neon);
+		sha256_base_do_finalize(desc, sha256_block_neon);
 		kernel_neon_end();
 	}
 	return sha256_base_finish(desc, out);
diff --git a/arch/arm64/crypto/sha512-ce-glue.c b/arch/arm64/crypto/sha512-ce-glue.c
index 2369540040aa..0f964235d753 100644
--- a/arch/arm64/crypto/sha512-ce-glue.c
+++ b/arch/arm64/crypto/sha512-ce-glue.c
@@ -27,18 +27,18 @@ MODULE_LICENSE("GPL v2");
 asmlinkage void sha512_ce_transform(struct sha512_state *sst, u8 const *src,
 				    int blocks);
 
-asmlinkage void sha512_block_data_order(u64 *digest, u8 const *src, int blocks);
+asmlinkage void sha512_block_data_order(struct sha512_state *sst, u8 const *src,
+					int blocks);
 
 static int sha512_ce_update(struct shash_desc *desc, const u8 *data,
 			    unsigned int len)
 {
 	if (!crypto_simd_usable())
 		return sha512_base_do_update(desc, data, len,
-				(sha512_block_fn *)sha512_block_data_order);
+					     sha512_block_data_order);
 
 	kernel_neon_begin();
-	sha512_base_do_update(desc, data, len,
-			      (sha512_block_fn *)sha512_ce_transform);
+	sha512_base_do_update(desc, data, len, sha512_ce_transform);
 	kernel_neon_end();
 
 	return 0;
@@ -50,16 +50,14 @@ static int sha512_ce_finup(struct shash_desc *desc, const u8 *data,
 	if (!crypto_simd_usable()) {
 		if (len)
 			sha512_base_do_update(desc, data, len,
-				(sha512_block_fn *)sha512_block_data_order);
-		sha512_base_do_finalize(desc,
-				(sha512_block_fn *)sha512_block_data_order);
+					      sha512_block_data_order);
+		sha512_base_do_finalize(desc, sha512_block_data_order);
 		return sha512_base_finish(desc, out);
 	}
 
 	kernel_neon_begin();
-	sha512_base_do_update(desc, data, len,
-			      (sha512_block_fn *)sha512_ce_transform);
-	sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform);
+	sha512_base_do_update(desc, data, len, sha512_ce_transform);
+	sha512_base_do_finalize(desc, sha512_ce_transform);
 	kernel_neon_end();
 	return sha512_base_finish(desc, out);
 }
@@ -67,13 +65,12 @@ static int sha512_ce_finup(struct shash_desc *desc, const u8 *data,
 static int sha512_ce_final(struct shash_desc *desc, u8 *out)
 {
 	if (!crypto_simd_usable()) {
-		sha512_base_do_finalize(desc,
-				(sha512_block_fn *)sha512_block_data_order);
+		sha512_base_do_finalize(desc, sha512_block_data_order);
 		return sha512_base_finish(desc, out);
 	}
 
 	kernel_neon_begin();
-	sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform);
+	sha512_base_do_finalize(desc, sha512_ce_transform);
 	kernel_neon_end();
 	return sha512_base_finish(desc, out);
 }
diff --git a/arch/arm64/crypto/sha512-glue.c b/arch/arm64/crypto/sha512-glue.c
index d915c656e5fe..0f6b610a7954 100644
--- a/arch/arm64/crypto/sha512-glue.c
+++ b/arch/arm64/crypto/sha512-glue.c
@@ -20,25 +20,22 @@ MODULE_LICENSE("GPL v2");
 MODULE_ALIAS_CRYPTO("sha384");
 MODULE_ALIAS_CRYPTO("sha512");
 
-asmlinkage void sha512_block_data_order(u32 *digest, const void *data,
-					unsigned int num_blks);
+asmlinkage void sha512_block_data_order(struct sha512_state *sst,
+					u8 const *src, int blocks);
 EXPORT_SYMBOL(sha512_block_data_order);
 
 static int sha512_update(struct shash_desc *desc, const u8 *data,
 			 unsigned int len)
 {
-	return sha512_base_do_update(desc, data, len,
-			(sha512_block_fn *)sha512_block_data_order);
+	return sha512_base_do_update(desc, data, len, sha512_block_data_order);
 }
 
 static int sha512_finup(struct shash_desc *desc, const u8 *data,
 			unsigned int len, u8 *out)
 {
 	if (len)
-		sha512_base_do_update(desc, data, len,
-			(sha512_block_fn *)sha512_block_data_order);
-	sha512_base_do_finalize(desc,
-			(sha512_block_fn *)sha512_block_data_order);
+		sha512_base_do_update(desc, data, len, sha512_block_data_order);
+	sha512_base_do_finalize(desc, sha512_block_data_order);
 
 	return sha512_base_finish(desc, out);
 }

base-commit: 100d46bd72ec689a5582c2f5f4deadc5bcb92d60
-- 
2.24.0.rc1.363.gb1bccd3e3d-goog




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