crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN

The CRYPTO_TFM_RES_BAD_KEY_LEN flag was apparently meant as a way to
make the ->setkey() functions provide more information about errors.

However, no one actually checks for this flag, which makes it pointless.

Also, many algorithms fail to set this flag when given a bad length key.
Reviewing just the generic implementations, this is the case for
aes-fixed-time, cbcmac, echainiv, nhpoly1305, pcrypt, rfc3686, rfc4309,
rfc7539, rfc7539esp, salsa20, seqiv, and xcbc.  But there are probably
many more in arch/*/crypto/ and drivers/crypto/.

Some algorithms can even set this flag when the key is the correct
length.  For example, authenc and authencesn set it when the key payload
is malformed in any way (not just a bad length), the atmel-sha and ccree
drivers can set it if a memory allocation fails, and the chelsio driver
sets it for bad auth tag lengths, not just bad key lengths.

So even if someone actually wanted to start checking this flag (which
seems unlikely, since it's been unused for a long time), there would be
a lot of work needed to get it working correctly.  But it would probably
be much better to go back to the drawing board and just define different
return values, like -EINVAL if the key is invalid for the algorithm vs.
-EKEYREJECTED if the key was rejected by a policy like "no weak keys".
That would be much simpler, less error-prone, and easier to test.

So just remove this flag.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

29 files changed, 51 insertions, 169 deletions

diff --git a/arch/arm/crypto/aes-ce-glue.c b/arch/arm/crypto/aes-ce-glue.c
index cdb1a07e7ad0..b668c97663ec 100644
--- a/arch/arm/crypto/aes-ce-glue.c
+++ b/arch/arm/crypto/aes-ce-glue.c
@@ -138,14 +138,8 @@ static int ce_aes_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
 			 unsigned int key_len)
 {
 	struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
-	int ret;
-
-	ret = ce_aes_expandkey(ctx, in_key, key_len);
-	if (!ret)
-		return 0;
 
-	crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-	return -EINVAL;
+	return ce_aes_expandkey(ctx, in_key, key_len);
 }
 
 struct crypto_aes_xts_ctx {
@@ -167,11 +161,7 @@ static int xts_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
 	if (!ret)
 		ret = ce_aes_expandkey(&ctx->key2, &in_key[key_len / 2],
 				       key_len / 2);
-	if (!ret)
-		return 0;
-
-	crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-	return -EINVAL;
+	return ret;
 }
 
 static int ecb_encrypt(struct skcipher_request *req)
diff --git a/arch/arm/crypto/crc32-ce-glue.c b/arch/arm/crypto/crc32-ce-glue.c
index 95592499b9bd..2208445808d7 100644
--- a/arch/arm/crypto/crc32-ce-glue.c
+++ b/arch/arm/crypto/crc32-ce-glue.c
@@ -54,10 +54,8 @@ static int crc32_setkey(struct crypto_shash *hash, const u8 *key,
 {
 	u32 *mctx = crypto_shash_ctx(hash);
 
-	if (keylen != sizeof(u32)) {
-		crypto_shash_set_flags(hash, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != sizeof(u32))
 		return -EINVAL;
-	}
 	*mctx = le32_to_cpup((__le32 *)key);
 	return 0;
 }
diff --git a/arch/arm/crypto/ghash-ce-glue.c b/arch/arm/crypto/ghash-ce-glue.c
index c691077679a6..7e8b2f55685c 100644
--- a/arch/arm/crypto/ghash-ce-glue.c
+++ b/arch/arm/crypto/ghash-ce-glue.c
@@ -163,10 +163,8 @@ static int ghash_setkey(struct crypto_shash *tfm,
 	struct ghash_key *key = crypto_shash_ctx(tfm);
 	be128 h;
 
-	if (keylen != GHASH_BLOCK_SIZE) {
-		crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != GHASH_BLOCK_SIZE)
 		return -EINVAL;
-	}
 
 	/* needed for the fallback */
 	memcpy(&key->k, inkey, GHASH_BLOCK_SIZE);
diff --git a/arch/arm64/crypto/aes-ce-ccm-glue.c b/arch/arm64/crypto/aes-ce-ccm-glue.c
index 541cf9165748..f6d19b0dc893 100644
--- a/arch/arm64/crypto/aes-ce-ccm-glue.c
+++ b/arch/arm64/crypto/aes-ce-ccm-glue.c
@@ -47,14 +47,8 @@ static int ccm_setkey(struct crypto_aead *tfm, const u8 *in_key,
 		      unsigned int key_len)
 {
 	struct crypto_aes_ctx *ctx = crypto_aead_ctx(tfm);
-	int ret;
 
-	ret = ce_aes_expandkey(ctx, in_key, key_len);
-	if (!ret)
-		return 0;
-
-	tfm->base.crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
-	return -EINVAL;
+	return ce_aes_expandkey(ctx, in_key, key_len);
 }
 
 static int ccm_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
diff --git a/arch/arm64/crypto/aes-ce-glue.c b/arch/arm64/crypto/aes-ce-glue.c
index 6d085dc56c51..56a5f6f0b0c1 100644
--- a/arch/arm64/crypto/aes-ce-glue.c
+++ b/arch/arm64/crypto/aes-ce-glue.c
@@ -143,14 +143,8 @@ int ce_aes_setkey(struct crypto_tfm *tfm, const u8 *in_key,
 		  unsigned int key_len)
 {
 	struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
-	int ret;
 
-	ret = ce_aes_expandkey(ctx, in_key, key_len);
-	if (!ret)
-		return 0;
-
-	tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
-	return -EINVAL;
+	return ce_aes_expandkey(ctx, in_key, key_len);
 }
 EXPORT_SYMBOL(ce_aes_setkey);
 
diff --git a/arch/arm64/crypto/aes-glue.c b/arch/arm64/crypto/aes-glue.c
index aa57dc639f77..ed5409c6abf4 100644
--- a/arch/arm64/crypto/aes-glue.c
+++ b/arch/arm64/crypto/aes-glue.c
@@ -132,13 +132,8 @@ static int skcipher_aes_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
 			       unsigned int key_len)
 {
 	struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
-	int ret;
-
-	ret = aes_expandkey(ctx, in_key, key_len);
-	if (ret)
-		crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
 
-	return ret;
+	return aes_expandkey(ctx, in_key, key_len);
 }
 
 static int __maybe_unused xts_set_key(struct crypto_skcipher *tfm,
@@ -155,11 +150,7 @@ static int __maybe_unused xts_set_key(struct crypto_skcipher *tfm,
 	if (!ret)
 		ret = aes_expandkey(&ctx->key2, &in_key[key_len / 2],
 				    key_len / 2);
-	if (!ret)
-		return 0;
-
-	crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-	return -EINVAL;
+	return ret;
 }
 
 static int __maybe_unused essiv_cbc_set_key(struct crypto_skcipher *tfm,
@@ -173,19 +164,12 @@ static int __maybe_unused essiv_cbc_set_key(struct crypto_skcipher *tfm,
 
 	ret = aes_expandkey(&ctx->key1, in_key, key_len);
 	if (ret)
-		goto out;
+		return ret;
 
 	desc->tfm = ctx->hash;
 	crypto_shash_digest(desc, in_key, key_len, digest);
 
-	ret = aes_expandkey(&ctx->key2, digest, sizeof(digest));
-	if (ret)
-		goto out;
-
-	return 0;
-out:
-	crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-	return -EINVAL;
+	return aes_expandkey(&ctx->key2, digest, sizeof(digest));
 }
 
 static int __maybe_unused ecb_encrypt(struct skcipher_request *req)
@@ -791,13 +775,8 @@ static int cbcmac_setkey(struct crypto_shash *tfm, const u8 *in_key,
 			 unsigned int key_len)
 {
 	struct mac_tfm_ctx *ctx = crypto_shash_ctx(tfm);
-	int err;
 
-	err = aes_expandkey(&ctx->key, in_key, key_len);
-	if (err)
-		crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-
-	return err;
+	return aes_expandkey(&ctx->key, in_key, key_len);
 }
 
 static void cmac_gf128_mul_by_x(be128 *y, const be128 *x)
diff --git a/arch/arm64/crypto/ghash-ce-glue.c b/arch/arm64/crypto/ghash-ce-glue.c
index 196aedd0c20c..22831d3b7f62 100644
--- a/arch/arm64/crypto/ghash-ce-glue.c
+++ b/arch/arm64/crypto/ghash-ce-glue.c
@@ -248,10 +248,8 @@ static int ghash_setkey(struct crypto_shash *tfm,
 {
 	struct ghash_key *key = crypto_shash_ctx(tfm);
 
-	if (keylen != GHASH_BLOCK_SIZE) {
-		crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != GHASH_BLOCK_SIZE)
 		return -EINVAL;
-	}
 
 	return __ghash_setkey(key, inkey, keylen);
 }
@@ -306,10 +304,8 @@ static int gcm_setkey(struct crypto_aead *tfm, const u8 *inkey,
 	int ret;
 
 	ret = aes_expandkey(&ctx->aes_key, inkey, keylen);
-	if (ret) {
-		tfm->base.crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+	if (ret)
 		return -EINVAL;
-	}
 
 	aes_encrypt(&ctx->aes_key, key, (u8[AES_BLOCK_SIZE]){});
 
diff --git a/arch/mips/crypto/crc32-mips.c b/arch/mips/crypto/crc32-mips.c
index 7d1d2425746f..faa88a6a74c0 100644
--- a/arch/mips/crypto/crc32-mips.c
+++ b/arch/mips/crypto/crc32-mips.c
@@ -177,10 +177,8 @@ static int chksum_setkey(struct crypto_shash *tfm, const u8 *key,
 {
 	struct chksum_ctx *mctx = crypto_shash_ctx(tfm);
 
-	if (keylen != sizeof(mctx->key)) {
-		crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != sizeof(mctx->key))
 		return -EINVAL;
-	}
 	mctx->key = get_unaligned_le32(key);
 	return 0;
 }
diff --git a/arch/powerpc/crypto/aes-spe-glue.c b/arch/powerpc/crypto/aes-spe-glue.c
index 1fad5d4c658d..c2b23b69d7b1 100644
--- a/arch/powerpc/crypto/aes-spe-glue.c
+++ b/arch/powerpc/crypto/aes-spe-glue.c
@@ -94,13 +94,6 @@ static int ppc_aes_setkey(struct crypto_tfm *tfm, const u8 *in_key,
 {
 	struct ppc_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 
-	if (key_len != AES_KEYSIZE_128 &&
-	    key_len != AES_KEYSIZE_192 &&
-	    key_len != AES_KEYSIZE_256) {
-		tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
-		return -EINVAL;
-	}
-
 	switch (key_len) {
 	case AES_KEYSIZE_128:
 		ctx->rounds = 4;
@@ -114,6 +107,8 @@ static int ppc_aes_setkey(struct crypto_tfm *tfm, const u8 *in_key,
 		ctx->rounds = 6;
 		ppc_expand_key_256(ctx->key_enc, in_key);
 		break;
+	default:
+		return -EINVAL;
 	}
 
 	ppc_generate_decrypt_key(ctx->key_dec, ctx->key_enc, key_len);
@@ -139,13 +134,6 @@ static int ppc_xts_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
 
 	key_len >>= 1;
 
-	if (key_len != AES_KEYSIZE_128 &&
-	    key_len != AES_KEYSIZE_192 &&
-	    key_len != AES_KEYSIZE_256) {
-		crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
-
 	switch (key_len) {
 	case AES_KEYSIZE_128:
 		ctx->rounds = 4;
@@ -162,6 +150,8 @@ static int ppc_xts_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
 		ppc_expand_key_256(ctx->key_enc, in_key);
 		ppc_expand_key_256(ctx->key_twk, in_key + AES_KEYSIZE_256);
 		break;
+	default:
+		return -EINVAL;
 	}
 
 	ppc_generate_decrypt_key(ctx->key_dec, ctx->key_enc, key_len);
diff --git a/arch/powerpc/crypto/crc32c-vpmsum_glue.c b/arch/powerpc/crypto/crc32c-vpmsum_glue.c
index 2c232898b933..63760b7dbb76 100644
--- a/arch/powerpc/crypto/crc32c-vpmsum_glue.c
+++ b/arch/powerpc/crypto/crc32c-vpmsum_glue.c
@@ -73,10 +73,8 @@ static int crc32c_vpmsum_setkey(struct crypto_shash *hash, const u8 *key,
 {
 	u32 *mctx = crypto_shash_ctx(hash);
 
-	if (keylen != sizeof(u32)) {
-		crypto_shash_set_flags(hash, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != sizeof(u32))
 		return -EINVAL;
-	}
 	*mctx = le32_to_cpup((__le32 *)key);
 	return 0;
 }
diff --git a/arch/s390/crypto/aes_s390.c b/arch/s390/crypto/aes_s390.c
index ead0b2c9881d..2db167e5871c 100644
--- a/arch/s390/crypto/aes_s390.c
+++ b/arch/s390/crypto/aes_s390.c
@@ -414,10 +414,8 @@ static int xts_aes_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
 		return err;
 
 	/* In fips mode only 128 bit or 256 bit keys are valid */
-	if (fips_enabled && key_len != 32 && key_len != 64) {
-		crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (fips_enabled && key_len != 32 && key_len != 64)
 		return -EINVAL;
-	}
 
 	/* Pick the correct function code based on the key length */
 	fc = (key_len == 32) ? CPACF_KM_XTS_128 :
diff --git a/arch/s390/crypto/crc32-vx.c b/arch/s390/crypto/crc32-vx.c
index 423ee05887e6..fafecad20752 100644
--- a/arch/s390/crypto/crc32-vx.c
+++ b/arch/s390/crypto/crc32-vx.c
@@ -111,10 +111,8 @@ static int crc32_vx_setkey(struct crypto_shash *tfm, const u8 *newkey,
 {
 	struct crc_ctx *mctx = crypto_shash_ctx(tfm);
 
-	if (newkeylen != sizeof(mctx->key)) {
-		crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (newkeylen != sizeof(mctx->key))
 		return -EINVAL;
-	}
 	mctx->key = le32_to_cpu(*(__le32 *)newkey);
 	return 0;
 }
@@ -124,10 +122,8 @@ static int crc32be_vx_setkey(struct crypto_shash *tfm, const u8 *newkey,
 {
 	struct crc_ctx *mctx = crypto_shash_ctx(tfm);
 
-	if (newkeylen != sizeof(mctx->key)) {
-		crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (newkeylen != sizeof(mctx->key))
 		return -EINVAL;
-	}
 	mctx->key = be32_to_cpu(*(__be32 *)newkey);
 	return 0;
 }
diff --git a/arch/s390/crypto/ghash_s390.c b/arch/s390/crypto/ghash_s390.c
index a3e7400e031c..6b07a2f1ce8a 100644
--- a/arch/s390/crypto/ghash_s390.c
+++ b/arch/s390/crypto/ghash_s390.c
@@ -43,10 +43,8 @@ static int ghash_setkey(struct crypto_shash *tfm,
 {
 	struct ghash_ctx *ctx = crypto_shash_ctx(tfm);
 
-	if (keylen != GHASH_BLOCK_SIZE) {
-		crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != GHASH_BLOCK_SIZE)
 		return -EINVAL;
-	}
 
 	memcpy(ctx->key, key, GHASH_BLOCK_SIZE);
 
diff --git a/arch/s390/crypto/paes_s390.c b/arch/s390/crypto/paes_s390.c
index c7119c617b6e..e2a85783f804 100644
--- a/arch/s390/crypto/paes_s390.c
+++ b/arch/s390/crypto/paes_s390.c
@@ -151,11 +151,7 @@ static int ecb_paes_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
 	if (rc)
 		return rc;
 
-	if (__paes_set_key(ctx)) {
-		crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
-	return 0;
+	return __paes_set_key(ctx);
 }
 
 static int ecb_paes_crypt(struct skcipher_request *req, unsigned long modifier)
@@ -254,11 +250,7 @@ static int cbc_paes_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
 	if (rc)
 		return rc;
 
-	if (__cbc_paes_set_key(ctx)) {
-		crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
-	return 0;
+	return __cbc_paes_set_key(ctx);
 }
 
 static int cbc_paes_crypt(struct skcipher_request *req, unsigned long modifier)
@@ -386,10 +378,9 @@ static int xts_paes_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
 	if (rc)
 		return rc;
 
-	if (__xts_paes_set_key(ctx)) {
-		crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
+	rc = __xts_paes_set_key(ctx);
+	if (rc)
+		return rc;
 
 	/*
 	 * xts_check_key verifies the key length is not odd and makes
@@ -526,11 +517,7 @@ static int ctr_paes_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
 	if (rc)
 		return rc;
 
-	if (__ctr_paes_set_key(ctx)) {
-		crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
-	return 0;
+	return __ctr_paes_set_key(ctx);
 }
 
 static unsigned int __ctrblk_init(u8 *ctrptr, u8 *iv, unsigned int nbytes)
diff --git a/arch/sparc/crypto/aes_glue.c b/arch/sparc/crypto/aes_glue.c
index 0f5a501c95a9..e3d2138ff9e2 100644
--- a/arch/sparc/crypto/aes_glue.c
+++ b/arch/sparc/crypto/aes_glue.c
@@ -169,7 +169,6 @@ static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
 		       unsigned int key_len)
 {
 	struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
-	u32 *flags = &tfm->crt_flags;
 
 	switch (key_len) {
 	case AES_KEYSIZE_128:
@@ -188,7 +187,6 @@ static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
 		break;
 
 	default:
-		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
 		return -EINVAL;
 	}
 
diff --git a/arch/sparc/crypto/camellia_glue.c b/arch/sparc/crypto/camellia_glue.c
index 1700f863748c..aaa9714378e6 100644
--- a/arch/sparc/crypto/camellia_glue.c
+++ b/arch/sparc/crypto/camellia_glue.c
@@ -39,12 +39,9 @@ static int camellia_set_key(struct crypto_tfm *tfm, const u8 *_in_key,
 {
 	struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
 	const u32 *in_key = (const u32 *) _in_key;
-	u32 *flags = &tfm->crt_flags;
 
-	if (key_len != 16 && key_len != 24 && key_len != 32) {
-		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+	if (key_len != 16 && key_len != 24 && key_len != 32)
 		return -EINVAL;
-	}
 
 	ctx->key_len = key_len;
 
diff --git a/arch/sparc/crypto/crc32c_glue.c b/arch/sparc/crypto/crc32c_glue.c
index 1299073285a3..4e9323229e71 100644
--- a/arch/sparc/crypto/crc32c_glue.c
+++ b/arch/sparc/crypto/crc32c_glue.c
@@ -33,10 +33,8 @@ static int crc32c_sparc64_setkey(struct crypto_shash *hash, const u8 *key,
 {
 	u32 *mctx = crypto_shash_ctx(hash);
 
-	if (keylen != sizeof(u32)) {
-		crypto_shash_set_flags(hash, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != sizeof(u32))
 		return -EINVAL;
-	}
 	*(__le32 *)mctx = le32_to_cpup((__le32 *)key);
 	return 0;
 }
diff --git a/arch/x86/crypto/aegis128-aesni-glue.c b/arch/x86/crypto/aegis128-aesni-glue.c
index 46d227122643..4623189000d8 100644
--- a/arch/x86/crypto/aegis128-aesni-glue.c
+++ b/arch/x86/crypto/aegis128-aesni-glue.c
@@ -144,10 +144,8 @@ static int crypto_aegis128_aesni_setkey(struct crypto_aead *aead, const u8 *key,
 {
 	struct aegis_ctx *ctx = crypto_aegis128_aesni_ctx(aead);
 
-	if (keylen != AEGIS128_KEY_SIZE) {
-		crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != AEGIS128_KEY_SIZE)
 		return -EINVAL;
-	}
 
 	memcpy(ctx->key.bytes, key, AEGIS128_KEY_SIZE);
 
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index 670f8fcf2544..bbbebbd35b5d 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -316,14 +316,11 @@ static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
 			      const u8 *in_key, unsigned int key_len)
 {
 	struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
-	u32 *flags = &tfm->crt_flags;
 	int err;
 
 	if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
-	    key_len != AES_KEYSIZE_256) {
-		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+	    key_len != AES_KEYSIZE_256)
 		return -EINVAL;
-	}
 
 	if (!crypto_simd_usable())
 		err = aes_expandkey(ctx, in_key, key_len);
@@ -641,10 +638,9 @@ static int common_rfc4106_set_key(struct crypto_aead *aead, const u8 *key,
 {
 	struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(aead);
 
-	if (key_len < 4) {
-		crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (key_len < 4)
 		return -EINVAL;
-	}
+
 	/*Account for 4 byte nonce at the end.*/
 	key_len -= 4;
 
diff --git a/arch/x86/crypto/blake2s-glue.c b/arch/x86/crypto/blake2s-glue.c
index 1d9ff8a45e1f..06ef2d4a4701 100644
--- a/arch/x86/crypto/blake2s-glue.c
+++ b/arch/x86/crypto/blake2s-glue.c
@@ -64,10 +64,8 @@ static int crypto_blake2s_setkey(struct crypto_shash *tfm, const u8 *key,
 {
 	struct blake2s_tfm_ctx *tctx = crypto_shash_ctx(tfm);
 
-	if (keylen == 0 || keylen > BLAKE2S_KEY_SIZE) {
-		crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen == 0 || keylen > BLAKE2S_KEY_SIZE)
 		return -EINVAL;
-	}
 
 	memcpy(tctx->key, key, keylen);
 	tctx->keylen = keylen;
diff --git a/arch/x86/crypto/camellia_aesni_avx2_glue.c b/arch/x86/crypto/camellia_aesni_avx2_glue.c
index a8cc2c83fe1b..ccda647422d6 100644
--- a/arch/x86/crypto/camellia_aesni_avx2_glue.c
+++ b/arch/x86/crypto/camellia_aesni_avx2_glue.c
@@ -142,8 +142,7 @@ static const struct common_glue_ctx camellia_dec_xts = {
 static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
 			   unsigned int keylen)
 {
-	return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen,
-				 &tfm->base.crt_flags);
+	return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
 }
 
 static int ecb_encrypt(struct skcipher_request *req)
diff --git a/arch/x86/crypto/camellia_aesni_avx_glue.c b/arch/x86/crypto/camellia_aesni_avx_glue.c
index 31a82a79f4ac..4e5de6ef206e 100644
--- a/arch/x86/crypto/camellia_aesni_avx_glue.c
+++ b/arch/x86/crypto/camellia_aesni_avx_glue.c
@@ -144,8 +144,7 @@ static const struct common_glue_ctx camellia_dec_xts = {
 static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
 			   unsigned int keylen)
 {
-	return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen,
-				 &tfm->base.crt_flags);
+	return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
 }
 
 static int ecb_encrypt(struct skcipher_request *req)
@@ -177,7 +176,6 @@ int xts_camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
 			unsigned int keylen)
 {
 	struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
-	u32 *flags = &tfm->base.crt_flags;
 	int err;
 
 	err = xts_verify_key(tfm, key, keylen);
@@ -185,13 +183,12 @@ int xts_camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
 		return err;
 
 	/* first half of xts-key is for crypt */
-	err = __camellia_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
+	err = __camellia_setkey(&ctx->crypt_ctx, key, keylen / 2);
 	if (err)
 		return err;
 
 	/* second half of xts-key is for tweak */
-	return __camellia_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
-				flags);
+	return __camellia_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
 }
 EXPORT_SYMBOL_GPL(xts_camellia_setkey);
 
diff --git a/arch/x86/crypto/camellia_glue.c b/arch/x86/crypto/camellia_glue.c
index 5f3ed5af68d7..242c056e5fa8 100644
--- a/arch/x86/crypto/camellia_glue.c
+++ b/arch/x86/crypto/camellia_glue.c
@@ -1227,12 +1227,10 @@ static void camellia_setup192(const unsigned char *key, u64 *subkey)
 }
 
 int __camellia_setkey(struct camellia_ctx *cctx, const unsigned char *key,
-		      unsigned int key_len, u32 *flags)
+		      unsigned int key_len)
 {
-	if (key_len != 16 && key_len != 24 && key_len != 32) {
-		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+	if (key_len != 16 && key_len != 24 && key_len != 32)
 		return -EINVAL;
-	}
 
 	cctx->key_length = key_len;
 
@@ -1255,8 +1253,7 @@ EXPORT_SYMBOL_GPL(__camellia_setkey);
 static int camellia_setkey(struct crypto_tfm *tfm, const u8 *key,
 			   unsigned int key_len)
 {
-	return __camellia_setkey(crypto_tfm_ctx(tfm), key, key_len,
-				 &tfm->crt_flags);
+	return __camellia_setkey(crypto_tfm_ctx(tfm), key, key_len);
 }
 
 static int camellia_setkey_skcipher(struct crypto_skcipher *tfm, const u8 *key,
diff --git a/arch/x86/crypto/cast6_avx_glue.c b/arch/x86/crypto/cast6_avx_glue.c
index da5297475f9e..48e0f37796fa 100644
--- a/arch/x86/crypto/cast6_avx_glue.c
+++ b/arch/x86/crypto/cast6_avx_glue.c
@@ -173,7 +173,6 @@ static int xts_cast6_setkey(struct crypto_skcipher *tfm, const u8 *key,
 			    unsigned int keylen)
 {
 	struct cast6_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
-	u32 *flags = &tfm->base.crt_flags;
 	int err;
 
 	err = xts_verify_key(tfm, key, keylen);
@@ -181,13 +180,12 @@ static int xts_cast6_setkey(struct crypto_skcipher *tfm, const u8 *key,
 		return err;
 
 	/* first half of xts-key is for crypt */
-	err = __cast6_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
+	err = __cast6_setkey(&ctx->crypt_ctx, key, keylen / 2);
 	if (err)
 		return err;
 
 	/* second half of xts-key is for tweak */
-	return __cast6_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
-			      flags);
+	return __cast6_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
 }
 
 static int xts_encrypt(struct skcipher_request *req)
diff --git a/arch/x86/crypto/crc32-pclmul_glue.c b/arch/x86/crypto/crc32-pclmul_glue.c
index cb4ab6645106..418bd88acac8 100644
--- a/arch/x86/crypto/crc32-pclmul_glue.c
+++ b/arch/x86/crypto/crc32-pclmul_glue.c
@@ -94,10 +94,8 @@ static int crc32_pclmul_setkey(struct crypto_shash *hash, const u8 *key,
 {
 	u32 *mctx = crypto_shash_ctx(hash);
 
-	if (keylen != sizeof(u32)) {
-		crypto_shash_set_flags(hash, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != sizeof(u32))
 		return -EINVAL;
-	}
 	*mctx = le32_to_cpup((__le32 *)key);
 	return 0;
 }
diff --git a/arch/x86/crypto/crc32c-intel_glue.c b/arch/x86/crypto/crc32c-intel_glue.c
index eefa0862f309..c20d1b8a82c3 100644
--- a/arch/x86/crypto/crc32c-intel_glue.c
+++ b/arch/x86/crypto/crc32c-intel_glue.c
@@ -91,10 +91,8 @@ static int crc32c_intel_setkey(struct crypto_shash *hash, const u8 *key,
 {
 	u32 *mctx = crypto_shash_ctx(hash);
 
-	if (keylen != sizeof(u32)) {
-		crypto_shash_set_flags(hash, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != sizeof(u32))
 		return -EINVAL;
-	}
 	*mctx = le32_to_cpup((__le32 *)key);
 	return 0;
 }
diff --git a/arch/x86/crypto/ghash-clmulni-intel_glue.c b/arch/x86/crypto/ghash-clmulni-intel_glue.c
index 04d72a5a8ce9..4a9c9833a7d6 100644
--- a/arch/x86/crypto/ghash-clmulni-intel_glue.c
+++ b/arch/x86/crypto/ghash-clmulni-intel_glue.c
@@ -57,10 +57,8 @@ static int ghash_setkey(struct crypto_shash *tfm,
 	be128 *x = (be128 *)key;
 	u64 a, b;
 
-	if (keylen != GHASH_BLOCK_SIZE) {
-		crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	if (keylen != GHASH_BLOCK_SIZE)
 		return -EINVAL;
-	}
 
 	/* perform multiplication by 'x' in GF(2^128) */
 	a = be64_to_cpu(x->a);
diff --git a/arch/x86/crypto/twofish_avx_glue.c b/arch/x86/crypto/twofish_avx_glue.c
index 3b36e97ec7ab..2dbc8ce3730e 100644
--- a/arch/x86/crypto/twofish_avx_glue.c
+++ b/arch/x86/crypto/twofish_avx_glue.c
@@ -64,7 +64,6 @@ static int xts_twofish_setkey(struct crypto_skcipher *tfm, const u8 *key,
 			      unsigned int keylen)
 {
 	struct twofish_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
-	u32 *flags = &tfm->base.crt_flags;
 	int err;
 
 	err = xts_verify_key(tfm, key, keylen);
@@ -72,13 +71,12 @@ static int xts_twofish_setkey(struct crypto_skcipher *tfm, const u8 *key,
 		return err;
 
 	/* first half of xts-key is for crypt */
-	err = __twofish_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
+	err = __twofish_setkey(&ctx->crypt_ctx, key, keylen / 2);
 	if (err)
 		return err;
 
 	/* second half of xts-key is for tweak */
-	return __twofish_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
-				flags);
+	return __twofish_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
 }
 
 static const struct common_glue_ctx twofish_enc = {
diff --git a/arch/x86/include/asm/crypto/camellia.h b/arch/x86/include/asm/crypto/camellia.h
index f1592619dd65..f6d91861cb14 100644
--- a/arch/x86/include/asm/crypto/camellia.h
+++ b/arch/x86/include/asm/crypto/camellia.h
@@ -26,7 +26,7 @@ struct camellia_xts_ctx {
 
 extern int __camellia_setkey(struct camellia_ctx *cctx,
 			     const unsigned char *key,
-			     unsigned int key_len, u32 *flags);
+			     unsigned int key_len);
 
 extern int xts_camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
 			       unsigned int keylen);