Merge tag 'v6.10-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
 "API:
   - Remove crypto stats interface

  Algorithms:
   - Add faster AES-XTS on modern x86_64 CPUs
   - Forbid curves with order less than 224 bits in ecc (FIPS 186-5)
   - Add ECDSA NIST P521

  Drivers:
   - Expose otp zone in atmel
   - Add dh fallback for primes > 4K in qat
   - Add interface for live migration in qat
   - Use dma for aes requests in starfive
   - Add full DMA support for stm32mpx in stm32
   - Add Tegra Security Engine driver

  Others:
   - Introduce scope-based x509_certificate allocation"

* tag 'v6.10-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (123 commits)
  crypto: atmel-sha204a - provide the otp content
  crypto: atmel-sha204a - add reading from otp zone
  crypto: atmel-i2c - rename read function
  crypto: atmel-i2c - add missing arg description
  crypto: iaa - Use kmemdup() instead of kzalloc() and memcpy()
  crypto: sahara - use 'time_left' variable with wait_for_completion_timeout()
  crypto: api - use 'time_left' variable with wait_for_completion_killable_timeout()
  crypto: caam - i.MX8ULP donot have CAAM page0 access
  crypto: caam - init-clk based on caam-page0-access
  crypto: starfive - Use fallback for unaligned dma access
  crypto: starfive - Do not free stack buffer
  crypto: starfive - Skip unneeded fallback allocation
  crypto: starfive - Skip dma setup for zeroed message
  crypto: hisilicon/sec2 - fix for register offset
  crypto: hisilicon/debugfs - mask the unnecessary info from the dump
  crypto: qat - specify firmware files for 402xx
  crypto: x86/aes-gcm - simplify GCM hash subkey derivation
  crypto: x86/aes-gcm - delete unused GCM assembly code
  crypto: x86/aes-xts - simplify loop in xts_crypt_slowpath()
  hwrng: stm32 - repair clock handling
  ...

4 files changed, 43 insertions, 50 deletions

diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index e314fd57e6f8..3474fb34ded9 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -234,6 +234,7 @@ static int software_key_query(const struct kernel_pkey_params *params,
 	info->key_size = len * 8;
 
 	if (strncmp(pkey->pkey_algo, "ecdsa", 5) == 0) {
+		int slen = len;
 		/*
 		 * ECDSA key sizes are much smaller than RSA, and thus could
 		 * operate on (hashed) inputs that are larger than key size.
@@ -247,8 +248,19 @@ static int software_key_query(const struct kernel_pkey_params *params,
 		 * Verify takes ECDSA-Sig (described in RFC 5480) as input,
 		 * which is actually 2 'key_size'-bit integers encoded in
 		 * ASN.1.  Account for the ASN.1 encoding overhead here.
+		 *
+		 * NIST P192/256/384 may prepend a '0' to a coordinate to
+		 * indicate a positive integer. NIST P521 never needs it.
 		 */
-		info->max_sig_size = 2 * (len + 3) + 2;
+		if (strcmp(pkey->pkey_algo, "ecdsa-nist-p521") != 0)
+			slen += 1;
+		/* Length of encoding the x & y coordinates */
+		slen = 2 * (slen + 2);
+		/*
+		 * If coordinate encoding takes at least 128 bytes then an
+		 * additional byte for length encoding is needed.
+		 */
+		info->max_sig_size = 1 + (slen >= 128) + 1 + slen;
 	} else {
 		info->max_data_size = len;
 		info->max_sig_size = len;
diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
index bb0bffa271b5..25cc4273472f 100644
--- a/crypto/asymmetric_keys/x509_cert_parser.c
+++ b/crypto/asymmetric_keys/x509_cert_parser.c
@@ -60,24 +60,23 @@ EXPORT_SYMBOL_GPL(x509_free_certificate);
  */
 struct x509_certificate *x509_cert_parse(const void *data, size_t datalen)
 {
-	struct x509_certificate *cert;
-	struct x509_parse_context *ctx;
+	struct x509_certificate *cert __free(x509_free_certificate);
+	struct x509_parse_context *ctx __free(kfree) = NULL;
 	struct asymmetric_key_id *kid;
 	long ret;
 
-	ret = -ENOMEM;
 	cert = kzalloc(sizeof(struct x509_certificate), GFP_KERNEL);
 	if (!cert)
-		goto error_no_cert;
+		return ERR_PTR(-ENOMEM);
 	cert->pub = kzalloc(sizeof(struct public_key), GFP_KERNEL);
 	if (!cert->pub)
-		goto error_no_ctx;
+		return ERR_PTR(-ENOMEM);
 	cert->sig = kzalloc(sizeof(struct public_key_signature), GFP_KERNEL);
 	if (!cert->sig)
-		goto error_no_ctx;
+		return ERR_PTR(-ENOMEM);
 	ctx = kzalloc(sizeof(struct x509_parse_context), GFP_KERNEL);
 	if (!ctx)
-		goto error_no_ctx;
+		return ERR_PTR(-ENOMEM);
 
 	ctx->cert = cert;
 	ctx->data = (unsigned long)data;
@@ -85,7 +84,7 @@ struct x509_certificate *x509_cert_parse(const void *data, size_t datalen)
 	/* Attempt to decode the certificate */
 	ret = asn1_ber_decoder(&x509_decoder, ctx, data, datalen);
 	if (ret < 0)
-		goto error_decode;
+		return ERR_PTR(ret);
 
 	/* Decode the AuthorityKeyIdentifier */
 	if (ctx->raw_akid) {
@@ -95,20 +94,19 @@ struct x509_certificate *x509_cert_parse(const void *data, size_t datalen)
 				       ctx->raw_akid, ctx->raw_akid_size);
 		if (ret < 0) {
 			pr_warn("Couldn't decode AuthKeyIdentifier\n");
-			goto error_decode;
+			return ERR_PTR(ret);
 		}
 	}
 
-	ret = -ENOMEM;
 	cert->pub->key = kmemdup(ctx->key, ctx->key_size, GFP_KERNEL);
 	if (!cert->pub->key)
-		goto error_decode;
+		return ERR_PTR(-ENOMEM);
 
 	cert->pub->keylen = ctx->key_size;
 
 	cert->pub->params = kmemdup(ctx->params, ctx->params_size, GFP_KERNEL);
 	if (!cert->pub->params)
-		goto error_decode;
+		return ERR_PTR(-ENOMEM);
 
 	cert->pub->paramlen = ctx->params_size;
 	cert->pub->algo = ctx->key_algo;
@@ -116,33 +114,23 @@ struct x509_certificate *x509_cert_parse(const void *data, size_t datalen)
 	/* Grab the signature bits */
 	ret = x509_get_sig_params(cert);
 	if (ret < 0)
-		goto error_decode;
+		return ERR_PTR(ret);
 
 	/* Generate cert issuer + serial number key ID */
 	kid = asymmetric_key_generate_id(cert->raw_serial,
 					 cert->raw_serial_size,
 					 cert->raw_issuer,
 					 cert->raw_issuer_size);
-	if (IS_ERR(kid)) {
-		ret = PTR_ERR(kid);
-		goto error_decode;
-	}
+	if (IS_ERR(kid))
+		return ERR_CAST(kid);
 	cert->id = kid;
 
 	/* Detect self-signed certificates */
 	ret = x509_check_for_self_signed(cert);
 	if (ret < 0)
-		goto error_decode;
+		return ERR_PTR(ret);
 
-	kfree(ctx);
-	return cert;
-
-error_decode:
-	kfree(ctx);
-error_no_ctx:
-	x509_free_certificate(cert);
-error_no_cert:
-	return ERR_PTR(ret);
+	return_ptr(cert);
 }
 EXPORT_SYMBOL_GPL(x509_cert_parse);
 
@@ -546,6 +534,9 @@ int x509_extract_key_data(void *context, size_t hdrlen,
 		case OID_id_ansip384r1:
 			ctx->cert->pub->pkey_algo = "ecdsa-nist-p384";
 			break;
+		case OID_id_ansip521r1:
+			ctx->cert->pub->pkey_algo = "ecdsa-nist-p521";
+			break;
 		default:
 			return -ENOPKG;
 		}
diff --git a/crypto/asymmetric_keys/x509_parser.h b/crypto/asymmetric_keys/x509_parser.h
index 97a886cbe01c..0688c222806b 100644
--- a/crypto/asymmetric_keys/x509_parser.h
+++ b/crypto/asymmetric_keys/x509_parser.h
@@ -5,6 +5,7 @@
  * Written by David Howells (dhowells@redhat.com)
  */
 
+#include <linux/cleanup.h>
 #include <linux/time.h>
 #include <crypto/public_key.h>
 #include <keys/asymmetric-type.h>
@@ -44,6 +45,8 @@ struct x509_certificate {
  * x509_cert_parser.c
  */
 extern void x509_free_certificate(struct x509_certificate *cert);
+DEFINE_FREE(x509_free_certificate, struct x509_certificate *,
+	    if (!IS_ERR(_T)) x509_free_certificate(_T))
 extern struct x509_certificate *x509_cert_parse(const void *data, size_t datalen);
 extern int x509_decode_time(time64_t *_t,  size_t hdrlen,
 			    unsigned char tag,
diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c
index 6a4f00be22fc..00ac7159fba2 100644
--- a/crypto/asymmetric_keys/x509_public_key.c
+++ b/crypto/asymmetric_keys/x509_public_key.c
@@ -161,12 +161,11 @@ not_self_signed:
  */
 static int x509_key_preparse(struct key_preparsed_payload *prep)
 {
-	struct asymmetric_key_ids *kids;
-	struct x509_certificate *cert;
+	struct x509_certificate *cert __free(x509_free_certificate);
+	struct asymmetric_key_ids *kids __free(kfree) = NULL;
+	char *p, *desc __free(kfree) = NULL;
 	const char *q;
 	size_t srlen, sulen;
-	char *desc = NULL, *p;
-	int ret;
 
 	cert = x509_cert_parse(prep->data, prep->datalen);
 	if (IS_ERR(cert))
@@ -188,9 +187,8 @@ static int x509_key_preparse(struct key_preparsed_payload *prep)
 	}
 
 	/* Don't permit addition of blacklisted keys */
-	ret = -EKEYREJECTED;
 	if (cert->blacklisted)
-		goto error_free_cert;
+		return -EKEYREJECTED;
 
 	/* Propose a description */
 	sulen = strlen(cert->subject);
@@ -202,10 +200,9 @@ static int x509_key_preparse(struct key_preparsed_payload *prep)
 		q = cert->raw_serial;
 	}
 
-	ret = -ENOMEM;
 	desc = kmalloc(sulen + 2 + srlen * 2 + 1, GFP_KERNEL);
 	if (!desc)
-		goto error_free_cert;
+		return -ENOMEM;
 	p = memcpy(desc, cert->subject, sulen);
 	p += sulen;
 	*p++ = ':';
@@ -215,16 +212,14 @@ static int x509_key_preparse(struct key_preparsed_payload *prep)
 
 	kids = kmalloc(sizeof(struct asymmetric_key_ids), GFP_KERNEL);
 	if (!kids)
-		goto error_free_desc;
+		return -ENOMEM;
 	kids->id[0] = cert->id;
 	kids->id[1] = cert->skid;
 	kids->id[2] = asymmetric_key_generate_id(cert->raw_subject,
 						 cert->raw_subject_size,
 						 "", 0);
-	if (IS_ERR(kids->id[2])) {
-		ret = PTR_ERR(kids->id[2]);
-		goto error_free_kids;
-	}
+	if (IS_ERR(kids->id[2]))
+		return PTR_ERR(kids->id[2]);
 
 	/* We're pinning the module by being linked against it */
 	__module_get(public_key_subtype.owner);
@@ -242,15 +237,7 @@ static int x509_key_preparse(struct key_preparsed_payload *prep)
 	cert->sig = NULL;
 	desc = NULL;
 	kids = NULL;
-	ret = 0;
-
-error_free_kids:
-	kfree(kids);
-error_free_desc:
-	kfree(desc);
-error_free_cert:
-	x509_free_certificate(cert);
-	return ret;
+	return 0;
 }
 
 static struct asymmetric_key_parser x509_key_parser = {