diff mbox series

[v2,06/12] crypto: x86/sha512 - fix possible crash with CFI enabled

Message ID 20221118194421.160414-7-ebiggers@kernel.org
State Superseded
Headers show
Series crypto: CFI fixes | expand

Commit Message

Eric Biggers Nov. 18, 2022, 7:44 p.m. UTC 
From: Eric Biggers <ebiggers@google.com>

sha512_transform_ssse3(), sha512_transform_avx(), and
sha512_transform_rorx() 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: ccace936eec7 ("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>
---
 arch/x86/crypto/sha512-avx-asm.S   | 3 ++-
 arch/x86/crypto/sha512-avx2-asm.S  | 3 ++-
 arch/x86/crypto/sha512-ssse3-asm.S | 3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/crypto/sha512-avx-asm.S b/arch/x86/crypto/sha512-avx-asm.S
index 1fefe6dd3a9e2..b0984f19fdb40 100644
--- a/arch/x86/crypto/sha512-avx-asm.S
+++ b/arch/x86/crypto/sha512-avx-asm.S
@@ -48,6 +48,7 @@ 
 ########################################################################
 
 #include <linux/linkage.h>
+#include <linux/cfi_types.h>
 
 .text
 
@@ -273,7 +274,7 @@  frame_size = frame_WK + WK_SIZE
 # of SHA512 message blocks.
 # "blocks" is the message length in SHA512 blocks
 ########################################################################
-SYM_FUNC_START(sha512_transform_avx)
+SYM_TYPED_FUNC_START(sha512_transform_avx)
 	test msglen, msglen
 	je nowork
 
diff --git a/arch/x86/crypto/sha512-avx2-asm.S b/arch/x86/crypto/sha512-avx2-asm.S
index 5cdaab7d69015..b1ca99055ef99 100644
--- a/arch/x86/crypto/sha512-avx2-asm.S
+++ b/arch/x86/crypto/sha512-avx2-asm.S
@@ -50,6 +50,7 @@ 
 ########################################################################
 
 #include <linux/linkage.h>
+#include <linux/cfi_types.h>
 
 .text
 
@@ -565,7 +566,7 @@  frame_size = frame_CTX + CTX_SIZE
 # of SHA512 message blocks.
 # "blocks" is the message length in SHA512 blocks
 ########################################################################
-SYM_FUNC_START(sha512_transform_rorx)
+SYM_TYPED_FUNC_START(sha512_transform_rorx)
 	# Save GPRs
 	push	%rbx
 	push	%r12
diff --git a/arch/x86/crypto/sha512-ssse3-asm.S b/arch/x86/crypto/sha512-ssse3-asm.S
index b84c22e06c5f7..c06afb5270e5f 100644
--- a/arch/x86/crypto/sha512-ssse3-asm.S
+++ b/arch/x86/crypto/sha512-ssse3-asm.S
@@ -48,6 +48,7 @@ 
 ########################################################################
 
 #include <linux/linkage.h>
+#include <linux/cfi_types.h>
 
 .text
 
@@ -274,7 +275,7 @@  frame_size = frame_WK + WK_SIZE
 # of SHA512 message blocks.
 # "blocks" is the message length in SHA512 blocks.
 ########################################################################
-SYM_FUNC_START(sha512_transform_ssse3)
+SYM_TYPED_FUNC_START(sha512_transform_ssse3)
 
 	test msglen, msglen
 	je nowork