crypto: x86/sha1 - fix possible crash with CFI enabled

[ Upstream commit 32f34bf ]

sha1_transform_ssse3(), sha1_transform_avx(), and sha1_ni_transform()
(but not sha1_transform_avx2()) are called via indirect function calls.
Therefore they need to use SYM_TYPED_FUNC_START instead of
SYM_FUNC_START to cause their 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
calls).

Fixes: ccace93 ("x86: Add types to indirectly called assembly functions")
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

arch/x86/crypto/sha1_ni_asm.S

@@ -54,6 +54,7 @@
  */
 
 #include <linux/linkage.h>
+#include <linux/cfi_types.h>
 
 #define DIGEST_PTR	%rdi	/* 1st arg */
 #define DATA_PTR	%rsi	/* 2nd arg */
@@ -93,7 +94,7 @@
  */
 .text
 .align 32
-SYM_FUNC_START(sha1_ni_transform)
+SYM_TYPED_FUNC_START(sha1_ni_transform)
 	push		%rbp
 	mov		%rsp, %rbp
 	sub		$FRAME_SIZE, %rsp

arch/x86/crypto/sha1_ssse3_asm.S

@@ -25,6 +25,7 @@
  */
 
 #include <linux/linkage.h>
+#include <linux/cfi_types.h>
 
 #define CTX	%rdi	// arg1
 #define BUF	%rsi	// arg2
@@ -67,7 +68,7 @@
  * param: function's name
  */
 .macro SHA1_VECTOR_ASM  name
-	SYM_FUNC_START(\name)
+	SYM_TYPED_FUNC_START(\name)
 
 	push	%rbx
 	push	%r12