The aesni_set_key() implementation has no error case, yet its prototype specifies to return an error code. Modify the function prototype to return void and adjust the related code. Signed-off-by: Chang S. Bae <chang.seok.bae@xxxxxxxxx> Reviewed-by: Eric Biggers <ebiggers@xxxxxxxxxx> Cc: Eric Biggers <ebiggers@xxxxxxxxxx> Cc: Ard Biesheuvel <ardb@xxxxxxxxxx> Cc: linux-crypto@xxxxxxxxxxxxxxx Cc: x86@xxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx --- V2 <- V1: * Ensure not to return an uninitialized value. (Ard Biesheuvel) Previously, Eric identified a similar case in my AES-KL code [1]. Then, this parallel issue was realized. [1]: https://lore.kernel.org/lkml/20230607053558.GC941@sol.localdomain/ --- arch/x86/crypto/aesni-intel_asm.S | 5 ++--- arch/x86/crypto/aesni-intel_glue.c | 8 ++++---- 2 files changed, 6 insertions(+), 7 deletions(-) diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S index 411d8c83e88a..7ecb55cae3d6 100644 --- a/arch/x86/crypto/aesni-intel_asm.S +++ b/arch/x86/crypto/aesni-intel_asm.S @@ -1820,8 +1820,8 @@ SYM_FUNC_START_LOCAL(_key_expansion_256b) SYM_FUNC_END(_key_expansion_256b) /* - * int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key, - * unsigned int key_len) + * void aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key, + * unsigned int key_len) */ SYM_FUNC_START(aesni_set_key) FRAME_BEGIN @@ -1926,7 +1926,6 @@ SYM_FUNC_START(aesni_set_key) sub $0x10, UKEYP cmp TKEYP, KEYP jb .Ldec_key_loop - xor AREG, AREG #ifndef __x86_64__ popl KEYP #endif diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c index 8b3b17b065ad..0ea3abaaa645 100644 --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -87,8 +87,8 @@ static inline void *aes_align_addr(void *addr) return PTR_ALIGN(addr, AESNI_ALIGN); } -asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key, - unsigned int key_len); +asmlinkage void aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key, + unsigned int key_len); asmlinkage void aesni_enc(const void *ctx, u8 *out, const u8 *in); asmlinkage void aesni_dec(const void *ctx, u8 *out, const u8 *in); asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out, @@ -241,9 +241,9 @@ static int aes_set_key_common(struct crypto_aes_ctx *ctx, return err; kernel_fpu_begin(); - err = aesni_set_key(ctx, in_key, key_len); + aesni_set_key(ctx, in_key, key_len); kernel_fpu_end(); - return err; + return 0; } static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key, -- 2.34.1
