diff mbox series

[09/11] crypto: arm64/sm3 - fix possible crash with CFI enabled

Message ID 20221118090220.398819-10-ebiggers@kernel.org (mailing list archive)
State New, archived
Headers show
Series crypto: CFI fixes | expand

Commit Message

Eric Biggers Nov. 18, 2022, 9:02 a.m. UTC 
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 mbox series

Patch

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]