diff mbox series

[v2,01/12] crypto: x86/aegis128 - fix possible crash with CFI enabled

Message ID 20221118194421.160414-2-ebiggers@kernel.org (mailing list archive)
State New, archived
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>

crypto_aegis128_aesni_enc(), crypto_aegis128_aesni_enc_tail(),
crypto_aegis128_aesni_dec(), and crypto_aegis128_aesni_dec_tail() 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/aegis128-aesni-asm.S | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/crypto/aegis128-aesni-asm.S b/arch/x86/crypto/aegis128-aesni-asm.S
index b48ddebb47489..cdf3215ec272c 100644
--- a/arch/x86/crypto/aegis128-aesni-asm.S
+++ b/arch/x86/crypto/aegis128-aesni-asm.S
@@ -7,6 +7,7 @@ 
  */
 
 #include <linux/linkage.h>
+#include <linux/cfi_types.h>
 #include <asm/frame.h>
 
 #define STATE0	%xmm0
@@ -402,7 +403,7 @@  SYM_FUNC_END(crypto_aegis128_aesni_ad)
  * void crypto_aegis128_aesni_enc(void *state, unsigned int length,
  *                                const void *src, void *dst);
  */
-SYM_FUNC_START(crypto_aegis128_aesni_enc)
+SYM_TYPED_FUNC_START(crypto_aegis128_aesni_enc)
 	FRAME_BEGIN
 
 	cmp $0x10, LEN
@@ -499,7 +500,7 @@  SYM_FUNC_END(crypto_aegis128_aesni_enc)
  * void crypto_aegis128_aesni_enc_tail(void *state, unsigned int length,
  *                                     const void *src, void *dst);
  */
-SYM_FUNC_START(crypto_aegis128_aesni_enc_tail)
+SYM_TYPED_FUNC_START(crypto_aegis128_aesni_enc_tail)
 	FRAME_BEGIN
 
 	/* load the state: */
@@ -556,7 +557,7 @@  SYM_FUNC_END(crypto_aegis128_aesni_enc_tail)
  * void crypto_aegis128_aesni_dec(void *state, unsigned int length,
  *                                const void *src, void *dst);
  */
-SYM_FUNC_START(crypto_aegis128_aesni_dec)
+SYM_TYPED_FUNC_START(crypto_aegis128_aesni_dec)
 	FRAME_BEGIN
 
 	cmp $0x10, LEN
@@ -653,7 +654,7 @@  SYM_FUNC_END(crypto_aegis128_aesni_dec)
  * void crypto_aegis128_aesni_dec_tail(void *state, unsigned int length,
  *                                     const void *src, void *dst);
  */
-SYM_FUNC_START(crypto_aegis128_aesni_dec_tail)
+SYM_TYPED_FUNC_START(crypto_aegis128_aesni_dec_tail)
 	FRAME_BEGIN
 
 	/* load the state: */