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crypto: x86/sm4 - fix crash with CFI enabled 

sm4_aesni_avx_ctr_enc_blk8(), sm4_aesni_avx_cbc_dec_blk8(),
sm4_aesni_avx_cfb_dec_blk8(), sm4_aesni_avx2_ctr_enc_blk16(),
sm4_aesni_avx2_cbc_dec_blk16(), and sm4_aesni_avx2_cfb_dec_blk16() 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.

(Or at least that should be the case.  For some reason the CFI checks in
sm4_avx_cbc_decrypt(), sm4_avx_cfb_decrypt(), and sm4_avx_ctr_crypt()
are not always being generated, using current tip-of-tree clang.
Anyway, this patch is a good idea anyway.)

Fixes: ccace936ee ("x86: Add types to indirectly called assembly functions")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2022-11-18 11:44:17 -08:00 committed by Herbert Xu
parent 8ba490d9f5
commit 2d203c46a0
2 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/x86/crypto/sm4-aesni-avx-asm_64.S
View File

@ -14,6 +14,7 @@
*/
#include <linux/linkage.h>
#include <linux/cfi_types.h>
#include <asm/frame.h>
#define rRIP (%rip)
@ -420,7 +421,7 @@ SYM_FUNC_END(sm4_aesni_avx_crypt8)
* const u8 *src, u8 *iv)
*/
.align 8
SYM_FUNC_START(sm4_aesni_avx_ctr_enc_blk8)
SYM_TYPED_FUNC_START(sm4_aesni_avx_ctr_enc_blk8)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (8 blocks)
@ -495,7 +496,7 @@ SYM_FUNC_END(sm4_aesni_avx_ctr_enc_blk8)
* const u8 *src, u8 *iv)
*/
.align 8
SYM_FUNC_START(sm4_aesni_avx_cbc_dec_blk8)
SYM_TYPED_FUNC_START(sm4_aesni_avx_cbc_dec_blk8)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (8 blocks)
@ -545,7 +546,7 @@ SYM_FUNC_END(sm4_aesni_avx_cbc_dec_blk8)
* const u8 *src, u8 *iv)
*/
.align 8
SYM_FUNC_START(sm4_aesni_avx_cfb_dec_blk8)
SYM_TYPED_FUNC_START(sm4_aesni_avx_cfb_dec_blk8)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (8 blocks)

7
arch/x86/crypto/sm4-aesni-avx2-asm_64.S
View File

@ -14,6 +14,7 @@
*/
#include <linux/linkage.h>
#include <linux/cfi_types.h>
#include <asm/frame.h>
#define rRIP (%rip)
@ -282,7 +283,7 @@ SYM_FUNC_END(__sm4_crypt_blk16)
* const u8 *src, u8 *iv)
*/
.align 8
SYM_FUNC_START(sm4_aesni_avx2_ctr_enc_blk16)
SYM_TYPED_FUNC_START(sm4_aesni_avx2_ctr_enc_blk16)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (16 blocks)
@ -395,7 +396,7 @@ SYM_FUNC_END(sm4_aesni_avx2_ctr_enc_blk16)
* const u8 *src, u8 *iv)
*/
.align 8
SYM_FUNC_START(sm4_aesni_avx2_cbc_dec_blk16)
SYM_TYPED_FUNC_START(sm4_aesni_avx2_cbc_dec_blk16)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (16 blocks)
@ -449,7 +450,7 @@ SYM_FUNC_END(sm4_aesni_avx2_cbc_dec_blk16)
* const u8 *src, u8 *iv)
*/
.align 8
SYM_FUNC_START(sm4_aesni_avx2_cfb_dec_blk16)
SYM_TYPED_FUNC_START(sm4_aesni_avx2_cfb_dec_blk16)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (16 blocks)