diff mbox series

[v2,06/28] crypto: aead - pass instance to crypto_grab_aead()

Message ID 20200103035908.12048-7-ebiggers@kernel.org (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show
Series crypto: template instantiation cleanup | expand

Commit Message

Eric Biggers Jan. 3, 2020, 3:58 a.m. UTC 
From: Eric Biggers <ebiggers@google.com>

Initializing a crypto_aead_spawn currently requires:

1. Set spawn->base.inst to point to the instance.
2. Call crypto_grab_aead().

But there's no reason for these steps to be separate, and in fact this
unneeded complication has caused at least one bug, the one fixed by
commit 6db43410179b ("crypto: adiantum - initialize crypto_spawn::inst")

So just make crypto_grab_aead() take the instance as an argument.

To keep the function calls from getting too unwieldy due to this extra
argument, also introduce a 'mask' variable into the affected places
which weren't already using one.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 crypto/aead.c                  |  6 ++++--
 crypto/ccm.c                   |  8 +++++---
 crypto/cryptd.c                |  4 ++--
 crypto/essiv.c                 |  3 +--
 crypto/gcm.c                   | 16 ++++++++++------
 crypto/geniv.c                 |  4 ++--
 crypto/pcrypt.c                |  5 ++---
 include/crypto/internal/aead.h | 11 +++--------
 8 files changed, 29 insertions(+), 28 deletions(-)
diff mbox series

Patch

diff --git a/crypto/aead.c b/crypto/aead.c
index 47f16d139e8e..c7135e00b8ea 100644
--- a/crypto/aead.c
+++ b/crypto/aead.c
@@ -207,9 +207,11 @@  static const struct crypto_type crypto_aead_type = {
 	.tfmsize = offsetof(struct crypto_aead, base),
 };
 
-int crypto_grab_aead(struct crypto_aead_spawn *spawn, const char *name,
-		     u32 type, u32 mask)
+int crypto_grab_aead(struct crypto_aead_spawn *spawn,
+		     struct crypto_instance *inst,
+		     const char *name, u32 type, u32 mask)
 {
+	spawn->base.inst = inst;
 	spawn->base.frontend = &crypto_aead_type;
 	return crypto_grab_spawn(&spawn->base, name, type, mask);
 }
diff --git a/crypto/ccm.c b/crypto/ccm.c
index d2279dc5b970..9c377976581d 100644
--- a/crypto/ccm.c
+++ b/crypto/ccm.c
@@ -746,6 +746,7 @@  static int crypto_rfc4309_create(struct crypto_template *tmpl,
 				 struct rtattr **tb)
 {
 	struct crypto_attr_type *algt;
+	u32 mask;
 	struct aead_instance *inst;
 	struct crypto_aead_spawn *spawn;
 	struct aead_alg *alg;
@@ -759,6 +760,8 @@  static int crypto_rfc4309_create(struct crypto_template *tmpl,
 	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
 		return -EINVAL;
 
+	mask = crypto_requires_sync(algt->type, algt->mask);
+
 	ccm_name = crypto_attr_alg_name(tb[1]);
 	if (IS_ERR(ccm_name))
 		return PTR_ERR(ccm_name);
@@ -768,9 +771,8 @@  static int crypto_rfc4309_create(struct crypto_template *tmpl,
 		return -ENOMEM;
 
 	spawn = aead_instance_ctx(inst);
-	crypto_set_aead_spawn(spawn, aead_crypto_instance(inst));
-	err = crypto_grab_aead(spawn, ccm_name, 0,
-			       crypto_requires_sync(algt->type, algt->mask));
+	err = crypto_grab_aead(spawn, aead_crypto_instance(inst),
+			       ccm_name, 0, mask);
 	if (err)
 		goto out_free_inst;
 
diff --git a/crypto/cryptd.c b/crypto/cryptd.c
index 01a1f6aa30ac..5aea6d6c49a0 100644
--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -874,8 +874,8 @@  static int cryptd_create_aead(struct crypto_template *tmpl,
 	ctx = aead_instance_ctx(inst);
 	ctx->queue = queue;
 
-	crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
-	err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
+	err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst),
+			       name, type, mask);
 	if (err)
 		goto out_free_inst;
 
diff --git a/crypto/essiv.c b/crypto/essiv.c
index 2019250da08e..388cceb8c1a0 100644
--- a/crypto/essiv.c
+++ b/crypto/essiv.c
@@ -516,8 +516,7 @@  static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
 		ictx = crypto_instance_ctx(inst);
 
 		/* AEAD cipher, e.g., "authenc(hmac(sha256),cbc(aes))" */
-		crypto_set_aead_spawn(&ictx->u.aead_spawn, inst);
-		err = crypto_grab_aead(&ictx->u.aead_spawn,
+		err = crypto_grab_aead(&ictx->u.aead_spawn, inst,
 				       inner_cipher_name, 0, mask);
 		if (err)
 			goto out_free_inst;
diff --git a/crypto/gcm.c b/crypto/gcm.c
index 5a01b2b956f6..4241264ff93a 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -866,6 +866,7 @@  static int crypto_rfc4106_create(struct crypto_template *tmpl,
 				 struct rtattr **tb)
 {
 	struct crypto_attr_type *algt;
+	u32 mask;
 	struct aead_instance *inst;
 	struct crypto_aead_spawn *spawn;
 	struct aead_alg *alg;
@@ -879,6 +880,8 @@  static int crypto_rfc4106_create(struct crypto_template *tmpl,
 	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
 		return -EINVAL;
 
+	mask = crypto_requires_sync(algt->type, algt->mask);
+
 	ccm_name = crypto_attr_alg_name(tb[1]);
 	if (IS_ERR(ccm_name))
 		return PTR_ERR(ccm_name);
@@ -888,9 +891,8 @@  static int crypto_rfc4106_create(struct crypto_template *tmpl,
 		return -ENOMEM;
 
 	spawn = aead_instance_ctx(inst);
-	crypto_set_aead_spawn(spawn, aead_crypto_instance(inst));
-	err = crypto_grab_aead(spawn, ccm_name, 0,
-			       crypto_requires_sync(algt->type, algt->mask));
+	err = crypto_grab_aead(spawn, aead_crypto_instance(inst),
+			       ccm_name, 0, mask);
 	if (err)
 		goto out_free_inst;
 
@@ -1102,6 +1104,7 @@  static int crypto_rfc4543_create(struct crypto_template *tmpl,
 				struct rtattr **tb)
 {
 	struct crypto_attr_type *algt;
+	u32 mask;
 	struct aead_instance *inst;
 	struct crypto_aead_spawn *spawn;
 	struct aead_alg *alg;
@@ -1116,6 +1119,8 @@  static int crypto_rfc4543_create(struct crypto_template *tmpl,
 	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
 		return -EINVAL;
 
+	mask = crypto_requires_sync(algt->type, algt->mask);
+
 	ccm_name = crypto_attr_alg_name(tb[1]);
 	if (IS_ERR(ccm_name))
 		return PTR_ERR(ccm_name);
@@ -1126,9 +1131,8 @@  static int crypto_rfc4543_create(struct crypto_template *tmpl,
 
 	ctx = aead_instance_ctx(inst);
 	spawn = &ctx->aead;
-	crypto_set_aead_spawn(spawn, aead_crypto_instance(inst));
-	err = crypto_grab_aead(spawn, ccm_name, 0,
-			       crypto_requires_sync(algt->type, algt->mask));
+	err = crypto_grab_aead(spawn, aead_crypto_instance(inst),
+			       ccm_name, 0, mask);
 	if (err)
 		goto out_free_inst;
 
diff --git a/crypto/geniv.c b/crypto/geniv.c
index b9e45a2a98b5..7afa48414f3a 100644
--- a/crypto/geniv.c
+++ b/crypto/geniv.c
@@ -64,8 +64,8 @@  struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl,
 	/* Ignore async algorithms if necessary. */
 	mask |= crypto_requires_sync(algt->type, algt->mask);
 
-	crypto_set_aead_spawn(spawn, aead_crypto_instance(inst));
-	err = crypto_grab_aead(spawn, name, type, mask);
+	err = crypto_grab_aead(spawn, aead_crypto_instance(inst),
+			       name, type, mask);
 	if (err)
 		goto err_free_inst;
 
diff --git a/crypto/pcrypt.c b/crypto/pcrypt.c
index d6696e217128..1b632139a8c1 100644
--- a/crypto/pcrypt.c
+++ b/crypto/pcrypt.c
@@ -258,9 +258,8 @@  static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
 	if (!ctx->psdec)
 		goto out_free_psenc;
 
-	crypto_set_aead_spawn(&ctx->spawn, aead_crypto_instance(inst));
-
-	err = crypto_grab_aead(&ctx->spawn, name, 0, 0);
+	err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst),
+			       name, 0, 0);
 	if (err)
 		goto out_free_psdec;
 
diff --git a/include/crypto/internal/aead.h b/include/crypto/internal/aead.h
index 374185a7567f..27b7b0224ea6 100644
--- a/include/crypto/internal/aead.h
+++ b/include/crypto/internal/aead.h
@@ -81,14 +81,9 @@  static inline struct aead_request *aead_request_cast(
 	return container_of(req, struct aead_request, base);
 }
 
-static inline void crypto_set_aead_spawn(
-	struct crypto_aead_spawn *spawn, struct crypto_instance *inst)
-{
-	crypto_set_spawn(&spawn->base, inst);
-}
-
-int crypto_grab_aead(struct crypto_aead_spawn *spawn, const char *name,
-		     u32 type, u32 mask);
+int crypto_grab_aead(struct crypto_aead_spawn *spawn,
+		     struct crypto_instance *inst,
+		     const char *name, u32 type, u32 mask);
 
 static inline void crypto_drop_aead(struct crypto_aead_spawn *spawn)
 {