1 files changed, 373 insertions, 532 deletions

diff --git a/crypto/gcm.c b/crypto/gcm.c
index fc2b55e..7d32d47 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -49,25 +49,22 @@ struct crypto_rfc4543_ctx {
 };
 
 struct crypto_rfc4543_req_ctx {
-	u8 auth_tag[16];
-	u8 assocbuf[32];
-	struct scatterlist cipher[1];
-	struct scatterlist payload[2];
-	struct scatterlist assoc[2];
 	struct aead_request subreq;
 };
 
 struct crypto_gcm_ghash_ctx {
 	unsigned int cryptlen;
 	struct scatterlist *src;
-	void (*complete)(struct aead_request *req, int err);
+	int (*complete)(struct aead_request *req, u32 flags);
 };
 
 struct crypto_gcm_req_priv_ctx {
+	u8 iv[16];
 	u8 auth_tag[16];
 	u8 iauth_tag[16];
-	struct scatterlist src[2];
-	struct scatterlist dst[2];
+	struct scatterlist src[3];
+	struct scatterlist dst[3];
+	struct scatterlist sg;
 	struct crypto_gcm_ghash_ctx ghash_ctx;
 	union {
 		struct ahash_request ahreq;
@@ -80,7 +77,12 @@ struct crypto_gcm_setkey_result {
 	struct completion completion;
 };
 
-static void *gcm_zeroes;
+static struct {
+	u8 buf[16];
+	struct scatterlist sg;
+} *gcm_zeroes;
+
+static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc);
 
 static inline struct crypto_gcm_req_priv_ctx *crypto_gcm_reqctx(
 	struct aead_request *req)
@@ -120,15 +122,13 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
 
 	crypto_ablkcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
 	crypto_ablkcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
-				   CRYPTO_TFM_REQ_MASK);
-
+					 CRYPTO_TFM_REQ_MASK);
 	err = crypto_ablkcipher_setkey(ctr, key, keylen);
+	crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) &
+				    CRYPTO_TFM_RES_MASK);
 	if (err)
 		return err;
 
-	crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) &
-				       CRYPTO_TFM_RES_MASK);
-
 	data = kzalloc(sizeof(*data) + crypto_ablkcipher_reqsize(ctr),
 		       GFP_KERNEL);
 	if (!data)
@@ -163,7 +163,7 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
 			      CRYPTO_TFM_RES_MASK);
 
 out:
-	kfree(data);
+	kzfree(data);
 	return err;
 }
 
@@ -186,35 +186,46 @@ static int crypto_gcm_setauthsize(struct crypto_aead *tfm,
 	return 0;
 }
 
-static void crypto_gcm_init_crypt(struct ablkcipher_request *ablk_req,
-				  struct aead_request *req,
-				  unsigned int cryptlen)
+static void crypto_gcm_init_common(struct aead_request *req)
 {
-	struct crypto_aead *aead = crypto_aead_reqtfm(req);
-	struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
 	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
-	struct scatterlist *dst;
 	__be32 counter = cpu_to_be32(1);
+	struct scatterlist *sg;
 
 	memset(pctx->auth_tag, 0, sizeof(pctx->auth_tag));
-	memcpy(req->iv + 12, &counter, 4);
+	memcpy(pctx->iv, req->iv, 12);
+	memcpy(pctx->iv + 12, &counter, 4);
 
-	sg_init_table(pctx->src, 2);
+	sg_init_table(pctx->src, 3);
 	sg_set_buf(pctx->src, pctx->auth_tag, sizeof(pctx->auth_tag));
-	scatterwalk_sg_chain(pctx->src, 2, req->src);
+	sg = scatterwalk_ffwd(pctx->src + 1, req->src, req->assoclen);
+	if (sg != pctx->src + 1)
+		scatterwalk_sg_chain(pctx->src, 2, sg);
 
-	dst = pctx->src;
 	if (req->src != req->dst) {
-		sg_init_table(pctx->dst, 2);
+		sg_init_table(pctx->dst, 3);
 		sg_set_buf(pctx->dst, pctx->auth_tag, sizeof(pctx->auth_tag));
-		scatterwalk_sg_chain(pctx->dst, 2, req->dst);
-		dst = pctx->dst;
+		sg = scatterwalk_ffwd(pctx->dst + 1, req->dst, req->assoclen);
+		if (sg != pctx->dst + 1)
+			scatterwalk_sg_chain(pctx->dst, 2, sg);
 	}
+}
+
+static void crypto_gcm_init_crypt(struct aead_request *req,
+				  unsigned int cryptlen)
+{
+	struct crypto_aead *aead = crypto_aead_reqtfm(req);
+	struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
+	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+	struct ablkcipher_request *ablk_req = &pctx->u.abreq;
+	struct scatterlist *dst;
+
+	dst = req->src == req->dst ? pctx->src : pctx->dst;
 
 	ablkcipher_request_set_tfm(ablk_req, ctx->ctr);
 	ablkcipher_request_set_crypt(ablk_req, pctx->src, dst,
 				     cryptlen + sizeof(pctx->auth_tag),
-				     req->iv);
+				     pctx->iv);
 }
 
 static inline unsigned int gcm_remain(unsigned int len)
@@ -224,41 +235,31 @@ static inline unsigned int gcm_remain(unsigned int len)
 }
 
 static void gcm_hash_len_done(struct crypto_async_request *areq, int err);
-static void gcm_hash_final_done(struct crypto_async_request *areq, int err);
 
 static int gcm_hash_update(struct aead_request *req,
-			   struct crypto_gcm_req_priv_ctx *pctx,
 			   crypto_completion_t compl,
 			   struct scatterlist *src,
-			   unsigned int len)
+			   unsigned int len, u32 flags)
 {
+	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	struct ahash_request *ahreq = &pctx->u.ahreq;
 
-	ahash_request_set_callback(ahreq, aead_request_flags(req),
-				   compl, req);
+	ahash_request_set_callback(ahreq, flags, compl, req);
 	ahash_request_set_crypt(ahreq, src, NULL, len);
 
 	return crypto_ahash_update(ahreq);
 }
 
 static int gcm_hash_remain(struct aead_request *req,
-			   struct crypto_gcm_req_priv_ctx *pctx,
 			   unsigned int remain,
-			   crypto_completion_t compl)
+			   crypto_completion_t compl, u32 flags)
 {
-	struct ahash_request *ahreq = &pctx->u.ahreq;
-
-	ahash_request_set_callback(ahreq, aead_request_flags(req),
-				   compl, req);
-	sg_init_one(pctx->src, gcm_zeroes, remain);
-	ahash_request_set_crypt(ahreq, pctx->src, NULL, remain);
-
-	return crypto_ahash_update(ahreq);
+	return gcm_hash_update(req, compl, &gcm_zeroes->sg, remain, flags);
 }
 
-static int gcm_hash_len(struct aead_request *req,
-			struct crypto_gcm_req_priv_ctx *pctx)
+static int gcm_hash_len(struct aead_request *req, u32 flags)
 {
+	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	struct ahash_request *ahreq = &pctx->u.ahreq;
 	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
 	u128 lengths;
@@ -266,76 +267,41 @@ static int gcm_hash_len(struct aead_request *req,
 	lengths.a = cpu_to_be64(req->assoclen * 8);
 	lengths.b = cpu_to_be64(gctx->cryptlen * 8);
 	memcpy(pctx->iauth_tag, &lengths, 16);
-	sg_init_one(pctx->src, pctx->iauth_tag, 16);
-	ahash_request_set_callback(ahreq, aead_request_flags(req),
-				   gcm_hash_len_done, req);
-	ahash_request_set_crypt(ahreq, pctx->src,
-				NULL, sizeof(lengths));
-
-	return crypto_ahash_update(ahreq);
-}
-
-static int gcm_hash_final(struct aead_request *req,
-			  struct crypto_gcm_req_priv_ctx *pctx)
-{
-	struct ahash_request *ahreq = &pctx->u.ahreq;
-
-	ahash_request_set_callback(ahreq, aead_request_flags(req),
-				   gcm_hash_final_done, req);
-	ahash_request_set_crypt(ahreq, NULL, pctx->iauth_tag, 0);
+	sg_init_one(&pctx->sg, pctx->iauth_tag, 16);
+	ahash_request_set_callback(ahreq, flags, gcm_hash_len_done, req);
+	ahash_request_set_crypt(ahreq, &pctx->sg,
+				pctx->iauth_tag, sizeof(lengths));
 
-	return crypto_ahash_final(ahreq);
+	return crypto_ahash_finup(ahreq);
 }
 
-static void __gcm_hash_final_done(struct aead_request *req, int err)
+static int gcm_hash_len_continue(struct aead_request *req, u32 flags)
 {
 	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
 
-	if (!err)
-		crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16);
-
-	gctx->complete(req, err);
+	return gctx->complete(req, flags);
 }
 
-static void gcm_hash_final_done(struct crypto_async_request *areq, int err)
+static void gcm_hash_len_done(struct crypto_async_request *areq, int err)
 {
 	struct aead_request *req = areq->data;
 
-	__gcm_hash_final_done(req, err);
-}
-
-static void __gcm_hash_len_done(struct aead_request *req, int err)
-{
-	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
-
-	if (!err) {
-		err = gcm_hash_final(req, pctx);
-		if (err == -EINPROGRESS || err == -EBUSY)
-			return;
-	}
-
-	__gcm_hash_final_done(req, err);
-}
+	if (err)
+		goto out;
 
-static void gcm_hash_len_done(struct crypto_async_request *areq, int err)
-{
-	struct aead_request *req = areq->data;
+	err = gcm_hash_len_continue(req, 0);
+	if (err == -EINPROGRESS)
+		return;
 
-	__gcm_hash_len_done(req, err);
+out:
+	aead_request_complete(req, err);
 }
 
-static void __gcm_hash_crypt_remain_done(struct aead_request *req, int err)
+static int gcm_hash_crypt_remain_continue(struct aead_request *req, u32 flags)
 {
-	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
-
-	if (!err) {
-		err = gcm_hash_len(req, pctx);
-		if (err == -EINPROGRESS || err == -EBUSY)
-			return;
-	}
-
-	__gcm_hash_len_done(req, err);
+	return gcm_hash_len(req, flags) ?:
+	       gcm_hash_len_continue(req, flags);
 }
 
 static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq,
@@ -343,55 +309,58 @@ static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq,
 {
 	struct aead_request *req = areq->data;
 
-	__gcm_hash_crypt_remain_done(req, err);
+	if (err)
+		goto out;
+
+	err = gcm_hash_crypt_remain_continue(req, 0);
+	if (err == -EINPROGRESS)
+		return;
+
+out:
+	aead_request_complete(req, err);
 }
 
-static void __gcm_hash_crypt_done(struct aead_request *req, int err)
+static int gcm_hash_crypt_continue(struct aead_request *req, u32 flags)
 {
 	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
 	unsigned int remain;
 
-	if (!err) {
-		remain = gcm_remain(gctx->cryptlen);
-		BUG_ON(!remain);
-		err = gcm_hash_remain(req, pctx, remain,
-				      gcm_hash_crypt_remain_done);
-		if (err == -EINPROGRESS || err == -EBUSY)
-			return;
-	}
+	remain = gcm_remain(gctx->cryptlen);
+	if (remain)
+		return gcm_hash_remain(req, remain,
+				       gcm_hash_crypt_remain_done, flags) ?:
+		       gcm_hash_crypt_remain_continue(req, flags);
 
-	__gcm_hash_crypt_remain_done(req, err);
+	return gcm_hash_crypt_remain_continue(req, flags);
 }
 
 static void gcm_hash_crypt_done(struct crypto_async_request *areq, int err)
 {
 	struct aead_request *req = areq->data;
 
-	__gcm_hash_crypt_done(req, err);
+	if (err)
+		goto out;
+
+	err = gcm_hash_crypt_continue(req, 0);
+	if (err == -EINPROGRESS)
+		return;
+
+out:
+	aead_request_complete(req, err);
 }
 
-static void __gcm_hash_assoc_remain_done(struct aead_request *req, int err)
+static int gcm_hash_assoc_remain_continue(struct aead_request *req, u32 flags)
 {
 	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
-	crypto_completion_t compl;
-	unsigned int remain = 0;
-
-	if (!err && gctx->cryptlen) {
-		remain = gcm_remain(gctx->cryptlen);
-		compl = remain ? gcm_hash_crypt_done :
-			gcm_hash_crypt_remain_done;
-		err = gcm_hash_update(req, pctx, compl,
-				      gctx->src, gctx->cryptlen);
-		if (err == -EINPROGRESS || err == -EBUSY)
-			return;
-	}
 
-	if (remain)
-		__gcm_hash_crypt_done(req, err);
-	else
-		__gcm_hash_crypt_remain_done(req, err);
+	if (gctx->cryptlen)
+		return gcm_hash_update(req, gcm_hash_crypt_done,
+				       gctx->src, gctx->cryptlen, flags) ?:
+		       gcm_hash_crypt_continue(req, flags);
+
+	return gcm_hash_crypt_remain_continue(req, flags);
 }
 
 static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq,
@@ -399,146 +368,120 @@ static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq,
 {
 	struct aead_request *req = areq->data;
 
-	__gcm_hash_assoc_remain_done(req, err);
+	if (err)
+		goto out;
+
+	err = gcm_hash_assoc_remain_continue(req, 0);
+	if (err == -EINPROGRESS)
+		return;
+
+out:
+	aead_request_complete(req, err);
 }
 
-static void __gcm_hash_assoc_done(struct aead_request *req, int err)
+static int gcm_hash_assoc_continue(struct aead_request *req, u32 flags)
 {
-	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	unsigned int remain;
 
-	if (!err) {
-		remain = gcm_remain(req->assoclen);
-		BUG_ON(!remain);
-		err = gcm_hash_remain(req, pctx, remain,
-				      gcm_hash_assoc_remain_done);
-		if (err == -EINPROGRESS || err == -EBUSY)
-			return;
-	}
+	remain = gcm_remain(req->assoclen);
+	if (remain)
+		return gcm_hash_remain(req, remain,
+				       gcm_hash_assoc_remain_done, flags) ?:
+		       gcm_hash_assoc_remain_continue(req, flags);
 
-	__gcm_hash_assoc_remain_done(req, err);
+	return gcm_hash_assoc_remain_continue(req, flags);
 }
 
 static void gcm_hash_assoc_done(struct crypto_async_request *areq, int err)
 {
 	struct aead_request *req = areq->data;
 
-	__gcm_hash_assoc_done(req, err);
+	if (err)
+		goto out;
+
+	err = gcm_hash_assoc_continue(req, 0);
+	if (err == -EINPROGRESS)
+		return;
+
+out:
+	aead_request_complete(req, err);
 }
 
-static void __gcm_hash_init_done(struct aead_request *req, int err)
+static int gcm_hash_init_continue(struct aead_request *req, u32 flags)
 {
-	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
-	crypto_completion_t compl;
-	unsigned int remain = 0;
-
-	if (!err && req->assoclen) {
-		remain = gcm_remain(req->assoclen);
-		compl = remain ? gcm_hash_assoc_done :
-			gcm_hash_assoc_remain_done;
-		err = gcm_hash_update(req, pctx, compl,
-				      req->assoc, req->assoclen);
-		if (err == -EINPROGRESS || err == -EBUSY)
-			return;
-	}
+	if (req->assoclen)
+		return gcm_hash_update(req, gcm_hash_assoc_done,
+				       req->src, req->assoclen, flags) ?:
+		       gcm_hash_assoc_continue(req, flags);
 
-	if (remain)
-		__gcm_hash_assoc_done(req, err);
-	else
-		__gcm_hash_assoc_remain_done(req, err);
+	return gcm_hash_assoc_remain_continue(req, flags);
 }
 
 static void gcm_hash_init_done(struct crypto_async_request *areq, int err)
 {
 	struct aead_request *req = areq->data;
 
-	__gcm_hash_init_done(req, err);
+	if (err)
+		goto out;
+
+	err = gcm_hash_init_continue(req, 0);
+	if (err == -EINPROGRESS)
+		return;
+
+out:
+	aead_request_complete(req, err);
 }
 
-static int gcm_hash(struct aead_request *req,
-		    struct crypto_gcm_req_priv_ctx *pctx)
+static int gcm_hash(struct aead_request *req, u32 flags)
 {
+	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	struct ahash_request *ahreq = &pctx->u.ahreq;
-	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
-	struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
-	unsigned int remain;
-	crypto_completion_t compl;
-	int err;
+	struct crypto_gcm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
 
 	ahash_request_set_tfm(ahreq, ctx->ghash);
 
-	ahash_request_set_callback(ahreq, aead_request_flags(req),
-				   gcm_hash_init_done, req);
-	err = crypto_ahash_init(ahreq);
-	if (err)
-		return err;
-	remain = gcm_remain(req->assoclen);
-	compl = remain ? gcm_hash_assoc_done : gcm_hash_assoc_remain_done;
-	err = gcm_hash_update(req, pctx, compl, req->assoc, req->assoclen);
-	if (err)
-		return err;
-	if (remain) {
-		err = gcm_hash_remain(req, pctx, remain,
-				      gcm_hash_assoc_remain_done);
-		if (err)
-			return err;
-	}
-	remain = gcm_remain(gctx->cryptlen);
-	compl = remain ? gcm_hash_crypt_done : gcm_hash_crypt_remain_done;
-	err = gcm_hash_update(req, pctx, compl, gctx->src, gctx->cryptlen);
-	if (err)
-		return err;
-	if (remain) {
-		err = gcm_hash_remain(req, pctx, remain,
-				      gcm_hash_crypt_remain_done);
-		if (err)
-			return err;
-	}
-	err = gcm_hash_len(req, pctx);
-	if (err)
-		return err;
-	err = gcm_hash_final(req, pctx);
-	if (err)
-		return err;
-
-	return 0;
+	ahash_request_set_callback(ahreq, flags, gcm_hash_init_done, req);
+	return crypto_ahash_init(ahreq) ?:
+	       gcm_hash_init_continue(req, flags);
 }
 
-static void gcm_enc_copy_hash(struct aead_request *req,
-			      struct crypto_gcm_req_priv_ctx *pctx)
+static int gcm_enc_copy_hash(struct aead_request *req, u32 flags)
 {
+	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
 	u8 *auth_tag = pctx->auth_tag;
 
-	scatterwalk_map_and_copy(auth_tag, req->dst, req->cryptlen,
+	crypto_xor(auth_tag, pctx->iauth_tag, 16);
+	scatterwalk_map_and_copy(auth_tag, req->dst,
+				 req->assoclen + req->cryptlen,
 				 crypto_aead_authsize(aead), 1);
+	return 0;
 }
 
-static void gcm_enc_hash_done(struct aead_request *req, int err)
+static int gcm_encrypt_continue(struct aead_request *req, u32 flags)
 {
 	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
 
-	if (!err)
-		gcm_enc_copy_hash(req, pctx);
+	gctx->src = sg_next(req->src == req->dst ? pctx->src : pctx->dst);
+	gctx->cryptlen = req->cryptlen;
+	gctx->complete = gcm_enc_copy_hash;
 
-	aead_request_complete(req, err);
+	return gcm_hash(req, flags);
 }
 
 static void gcm_encrypt_done(struct crypto_async_request *areq, int err)
 {
 	struct aead_request *req = areq->data;
-	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 
-	if (!err) {
-		err = gcm_hash(req, pctx);
-		if (err == -EINPROGRESS || err == -EBUSY)
-			return;
-		else if (!err) {
-			crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16);
-			gcm_enc_copy_hash(req, pctx);
-		}
-	}
+	if (err)
+		goto out;
+
+	err = gcm_encrypt_continue(req, 0);
+	if (err == -EINPROGRESS)
+		return;
 
+out:
 	aead_request_complete(req, err);
 }
 
@@ -546,34 +489,19 @@ static int crypto_gcm_encrypt(struct aead_request *req)
 {
 	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	struct ablkcipher_request *abreq = &pctx->u.abreq;
-	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
-	int err;
-
-	crypto_gcm_init_crypt(abreq, req, req->cryptlen);
-	ablkcipher_request_set_callback(abreq, aead_request_flags(req),
-					gcm_encrypt_done, req);
-
-	gctx->src = req->dst;
-	gctx->cryptlen = req->cryptlen;
-	gctx->complete = gcm_enc_hash_done;
-
-	err = crypto_ablkcipher_encrypt(abreq);
-	if (err)
-		return err;
-
-	err = gcm_hash(req, pctx);
-	if (err)
-		return err;
+	u32 flags = aead_request_flags(req);
 
-	crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16);
-	gcm_enc_copy_hash(req, pctx);
+	crypto_gcm_init_common(req);
+	crypto_gcm_init_crypt(req, req->cryptlen);
+	ablkcipher_request_set_callback(abreq, flags, gcm_encrypt_done, req);
 
-	return 0;
+	return crypto_ablkcipher_encrypt(abreq) ?:
+	       gcm_encrypt_continue(req, flags);
 }
 
-static int crypto_gcm_verify(struct aead_request *req,
-			     struct crypto_gcm_req_priv_ctx *pctx)
+static int crypto_gcm_verify(struct aead_request *req)
 {
+	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
 	u8 *auth_tag = pctx->auth_tag;
 	u8 *iauth_tag = pctx->iauth_tag;
@@ -581,78 +509,57 @@ static int crypto_gcm_verify(struct aead_request *req,
 	unsigned int cryptlen = req->cryptlen - authsize;
 
 	crypto_xor(auth_tag, iauth_tag, 16);
-	scatterwalk_map_and_copy(iauth_tag, req->src, cryptlen, authsize, 0);
+	scatterwalk_map_and_copy(iauth_tag, req->src,
+				 req->assoclen + cryptlen, authsize, 0);
 	return crypto_memneq(iauth_tag, auth_tag, authsize) ? -EBADMSG : 0;
 }
 
 static void gcm_decrypt_done(struct crypto_async_request *areq, int err)
 {
 	struct aead_request *req = areq->data;
-	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 
 	if (!err)
-		err = crypto_gcm_verify(req, pctx);
+		err = crypto_gcm_verify(req);
 
 	aead_request_complete(req, err);
 }
 
-static void gcm_dec_hash_done(struct aead_request *req, int err)
+static int gcm_dec_hash_continue(struct aead_request *req, u32 flags)
 {
 	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 	struct ablkcipher_request *abreq = &pctx->u.abreq;
 	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
 
-	if (!err) {
-		ablkcipher_request_set_callback(abreq, aead_request_flags(req),
-						gcm_decrypt_done, req);
-		crypto_gcm_init_crypt(abreq, req, gctx->cryptlen);
-		err = crypto_ablkcipher_decrypt(abreq);
-		if (err == -EINPROGRESS || err == -EBUSY)
-			return;
-		else if (!err)
-			err = crypto_gcm_verify(req, pctx);
-	}
-
-	aead_request_complete(req, err);
+	crypto_gcm_init_crypt(req, gctx->cryptlen);
+	ablkcipher_request_set_callback(abreq, flags, gcm_decrypt_done, req);
+	return crypto_ablkcipher_decrypt(abreq) ?: crypto_gcm_verify(req);
 }
 
 static int crypto_gcm_decrypt(struct aead_request *req)
 {
 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
 	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
-	struct ablkcipher_request *abreq = &pctx->u.abreq;
 	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
 	unsigned int authsize = crypto_aead_authsize(aead);
 	unsigned int cryptlen = req->cryptlen;
-	int err;
+	u32 flags = aead_request_flags(req);
 
-	if (cryptlen < authsize)
-		return -EINVAL;
 	cryptlen -= authsize;
 
-	gctx->src = req->src;
-	gctx->cryptlen = cryptlen;
-	gctx->complete = gcm_dec_hash_done;
-
-	err = gcm_hash(req, pctx);
-	if (err)
-		return err;
+	crypto_gcm_init_common(req);
 
-	ablkcipher_request_set_callback(abreq, aead_request_flags(req),
-					gcm_decrypt_done, req);
-	crypto_gcm_init_crypt(abreq, req, cryptlen);
-	err = crypto_ablkcipher_decrypt(abreq);
-	if (err)
-		return err;
+	gctx->src = sg_next(pctx->src);
+	gctx->cryptlen = cryptlen;
+	gctx->complete = gcm_dec_hash_continue;
 
-	return crypto_gcm_verify(req, pctx);
+	return gcm_hash(req, flags);
 }
 
-static int crypto_gcm_init_tfm(struct crypto_tfm *tfm)
+static int crypto_gcm_init_tfm(struct crypto_aead *tfm)
 {
-	struct crypto_instance *inst = (void *)tfm->__crt_alg;
-	struct gcm_instance_ctx *ictx = crypto_instance_ctx(inst);
-	struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct aead_instance *inst = aead_alg_instance(tfm);
+	struct gcm_instance_ctx *ictx = aead_instance_ctx(inst);
+	struct crypto_gcm_ctx *ctx = crypto_aead_ctx(tfm);
 	struct crypto_ablkcipher *ctr;
 	struct crypto_ahash *ghash;
 	unsigned long align;
@@ -670,9 +577,9 @@ static int crypto_gcm_init_tfm(struct crypto_tfm *tfm)
 	ctx->ctr = ctr;
 	ctx->ghash = ghash;
 
-	align = crypto_tfm_alg_alignmask(tfm);
+	align = crypto_aead_alignmask(tfm);
 	align &= ~(crypto_tfm_ctx_alignment() - 1);
-	crypto_aead_set_reqsize(__crypto_aead_cast(tfm),
+	crypto_aead_set_reqsize(tfm,
 		align + offsetof(struct crypto_gcm_req_priv_ctx, u) +
 		max(sizeof(struct ablkcipher_request) +
 		    crypto_ablkcipher_reqsize(ctr),
@@ -686,53 +593,59 @@ err_free_hash:
 	return err;
 }
 
-static void crypto_gcm_exit_tfm(struct crypto_tfm *tfm)
+static void crypto_gcm_exit_tfm(struct crypto_aead *tfm)
 {
-	struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct crypto_gcm_ctx *ctx = crypto_aead_ctx(tfm);
 
 	crypto_free_ahash(ctx->ghash);
 	crypto_free_ablkcipher(ctx->ctr);
 }
 
-static struct crypto_instance *crypto_gcm_alloc_common(struct rtattr **tb,
-						       const char *full_name,
-						       const char *ctr_name,
-						       const char *ghash_name)
+static int crypto_gcm_create_common(struct crypto_template *tmpl,
+				    struct rtattr **tb,
+				    const char *full_name,
+				    const char *ctr_name,
+				    const char *ghash_name)
 {
 	struct crypto_attr_type *algt;
-	struct crypto_instance *inst;
+	struct aead_instance *inst;
 	struct crypto_alg *ctr;
 	struct crypto_alg *ghash_alg;
-	struct ahash_alg *ghash_ahash_alg;
+	struct hash_alg_common *ghash;
 	struct gcm_instance_ctx *ctx;
 	int err;
 
 	algt = crypto_get_attr_type(tb);
 	if (IS_ERR(algt))
-		return ERR_CAST(algt);
+		return PTR_ERR(algt);
 
 	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 
 	ghash_alg = crypto_find_alg(ghash_name, &crypto_ahash_type,
 				    CRYPTO_ALG_TYPE_HASH,
 				    CRYPTO_ALG_TYPE_AHASH_MASK);
 	if (IS_ERR(ghash_alg))
-		return ERR_CAST(ghash_alg);
+		return PTR_ERR(ghash_alg);
+
+	ghash = __crypto_hash_alg_common(ghash_alg);
 
 	err = -ENOMEM;
 	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
 	if (!inst)
 		goto out_put_ghash;
 
-	ctx = crypto_instance_ctx(inst);
-	ghash_ahash_alg = container_of(ghash_alg, struct ahash_alg, halg.base);
-	err = crypto_init_ahash_spawn(&ctx->ghash, &ghash_ahash_alg->halg,
-				      inst);
+	ctx = aead_instance_ctx(inst);
+	err = crypto_init_ahash_spawn(&ctx->ghash, ghash,
+				      aead_crypto_instance(inst));
 	if (err)
 		goto err_free_inst;
 
-	crypto_set_skcipher_spawn(&ctx->ctr, inst);
+	err = -EINVAL;
+	if (ghash->digestsize != 16)
+		goto err_drop_ghash;
+
+	crypto_set_skcipher_spawn(&ctx->ctr, aead_crypto_instance(inst));
 	err = crypto_grab_skcipher(&ctx->ctr, ctr_name, 0,
 				   crypto_requires_sync(algt->type,
 							algt->mask));
@@ -751,33 +664,38 @@ static struct crypto_instance *crypto_gcm_alloc_common(struct rtattr **tb,
 		goto out_put_ctr;
 
 	err = -ENAMETOOLONG;
-	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+	if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
 		     "gcm_base(%s,%s)", ctr->cra_driver_name,
 		     ghash_alg->cra_driver_name) >=
 	    CRYPTO_MAX_ALG_NAME)
 		goto out_put_ctr;
 
-	memcpy(inst->alg.cra_name, full_name, CRYPTO_MAX_ALG_NAME);
-
-	inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
-	inst->alg.cra_flags |= ctr->cra_flags & CRYPTO_ALG_ASYNC;
-	inst->alg.cra_priority = ctr->cra_priority;
-	inst->alg.cra_blocksize = 1;
-	inst->alg.cra_alignmask = ctr->cra_alignmask | (__alignof__(u64) - 1);
-	inst->alg.cra_type = &crypto_aead_type;
-	inst->alg.cra_aead.ivsize = 16;
-	inst->alg.cra_aead.maxauthsize = 16;
-	inst->alg.cra_ctxsize = sizeof(struct crypto_gcm_ctx);
-	inst->alg.cra_init = crypto_gcm_init_tfm;
-	inst->alg.cra_exit = crypto_gcm_exit_tfm;
-	inst->alg.cra_aead.setkey = crypto_gcm_setkey;
-	inst->alg.cra_aead.setauthsize = crypto_gcm_setauthsize;
-	inst->alg.cra_aead.encrypt = crypto_gcm_encrypt;
-	inst->alg.cra_aead.decrypt = crypto_gcm_decrypt;
+	memcpy(inst->alg.base.cra_name, full_name, CRYPTO_MAX_ALG_NAME);
+
+	inst->alg.base.cra_flags = (ghash->base.cra_flags | ctr->cra_flags) &
+				   CRYPTO_ALG_ASYNC;
+	inst->alg.base.cra_priority = (ghash->base.cra_priority +
+				       ctr->cra_priority) / 2;
+	inst->alg.base.cra_blocksize = 1;
+	inst->alg.base.cra_alignmask = ghash->base.cra_alignmask |
+				       ctr->cra_alignmask;
+	inst->alg.base.cra_ctxsize = sizeof(struct crypto_gcm_ctx);
+	inst->alg.ivsize = 12;
+	inst->alg.maxauthsize = 16;
+	inst->alg.init = crypto_gcm_init_tfm;
+	inst->alg.exit = crypto_gcm_exit_tfm;
+	inst->alg.setkey = crypto_gcm_setkey;
+	inst->alg.setauthsize = crypto_gcm_setauthsize;
+	inst->alg.encrypt = crypto_gcm_encrypt;
+	inst->alg.decrypt = crypto_gcm_decrypt;
+
+	err = aead_register_instance(tmpl, inst);
+	if (err)
+		goto out_put_ctr;
 
-out:
+out_put_ghash:
 	crypto_mod_put(ghash_alg);
-	return inst;
+	return err;
 
 out_put_ctr:
 	crypto_drop_skcipher(&ctx->ctr);
@@ -785,12 +703,10 @@ err_drop_ghash:
 	crypto_drop_ahash(&ctx->ghash);
 err_free_inst:
 	kfree(inst);
-out_put_ghash:
-	inst = ERR_PTR(err);
-	goto out;
+	goto out_put_ghash;
 }
 
-static struct crypto_instance *crypto_gcm_alloc(struct rtattr **tb)
+static int crypto_gcm_create(struct crypto_template *tmpl, struct rtattr **tb)
 {
 	const char *cipher_name;
 	char ctr_name[CRYPTO_MAX_ALG_NAME];
@@ -798,17 +714,18 @@ static struct crypto_instance *crypto_gcm_alloc(struct rtattr **tb)
 
 	cipher_name = crypto_attr_alg_name(tb[1]);
 	if (IS_ERR(cipher_name))
-		return ERR_CAST(cipher_name);
+		return PTR_ERR(cipher_name);
 
 	if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)", cipher_name) >=
 	    CRYPTO_MAX_ALG_NAME)
-		return ERR_PTR(-ENAMETOOLONG);
+		return -ENAMETOOLONG;
 
 	if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "gcm(%s)", cipher_name) >=
 	    CRYPTO_MAX_ALG_NAME)
-		return ERR_PTR(-ENAMETOOLONG);
+		return -ENAMETOOLONG;
 
-	return crypto_gcm_alloc_common(tb, full_name, ctr_name, "ghash");
+	return crypto_gcm_create_common(tmpl, tb, full_name,
+					ctr_name, "ghash");
 }
 
 static void crypto_gcm_free(struct crypto_instance *inst)
@@ -817,17 +734,18 @@ static void crypto_gcm_free(struct crypto_instance *inst)
 
 	crypto_drop_skcipher(&ctx->ctr);
 	crypto_drop_ahash(&ctx->ghash);
-	kfree(inst);
+	kfree(aead_instance(inst));
 }
 
 static struct crypto_template crypto_gcm_tmpl = {
 	.name = "gcm",
-	.alloc = crypto_gcm_alloc,
+	.create = crypto_gcm_create,
 	.free = crypto_gcm_free,
 	.module = THIS_MODULE,
 };
 
-static struct crypto_instance *crypto_gcm_base_alloc(struct rtattr **tb)
+static int crypto_gcm_base_create(struct crypto_template *tmpl,
+				  struct rtattr **tb)
 {
 	const char *ctr_name;
 	const char *ghash_name;
@@ -835,22 +753,23 @@ static struct crypto_instance *crypto_gcm_base_alloc(struct rtattr **tb)
 
 	ctr_name = crypto_attr_alg_name(tb[1]);
 	if (IS_ERR(ctr_name))
-		return ERR_CAST(ctr_name);
+		return PTR_ERR(ctr_name);
 
 	ghash_name = crypto_attr_alg_name(tb[2]);
 	if (IS_ERR(ghash_name))
-		return ERR_CAST(ghash_name);
+		return PTR_ERR(ghash_name);
 
 	if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "gcm_base(%s,%s)",
 		     ctr_name, ghash_name) >= CRYPTO_MAX_ALG_NAME)
-		return ERR_PTR(-ENAMETOOLONG);
+		return -ENAMETOOLONG;
 
-	return crypto_gcm_alloc_common(tb, full_name, ctr_name, ghash_name);
+	return crypto_gcm_create_common(tmpl, tb, full_name,
+					ctr_name, ghash_name);
 }
 
 static struct crypto_template crypto_gcm_base_tmpl = {
 	.name = "gcm_base",
-	.alloc = crypto_gcm_base_alloc,
+	.create = crypto_gcm_base_create,
 	.free = crypto_gcm_free,
 	.module = THIS_MODULE,
 };
@@ -911,7 +830,7 @@ static struct aead_request *crypto_rfc4106_crypt(struct aead_request *req)
 	aead_request_set_callback(subreq, req->base.flags, req->base.complete,
 				  req->base.data);
 	aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, iv);
-	aead_request_set_assoc(subreq, req->assoc, req->assoclen);
+	aead_request_set_ad(subreq, req->assoclen);
 
 	return subreq;
 }
@@ -930,11 +849,11 @@ static int crypto_rfc4106_decrypt(struct aead_request *req)
 	return crypto_aead_decrypt(req);
 }
 
-static int crypto_rfc4106_init_tfm(struct crypto_tfm *tfm)
+static int crypto_rfc4106_init_tfm(struct crypto_aead *tfm)
 {
-	struct crypto_instance *inst = (void *)tfm->__crt_alg;
-	struct crypto_aead_spawn *spawn = crypto_instance_ctx(inst);
-	struct crypto_rfc4106_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct aead_instance *inst = aead_alg_instance(tfm);
+	struct crypto_aead_spawn *spawn = aead_instance_ctx(inst);
+	struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(tfm);
 	struct crypto_aead *aead;
 	unsigned long align;
 
@@ -946,126 +865,120 @@ static int crypto_rfc4106_init_tfm(struct crypto_tfm *tfm)
 
 	align = crypto_aead_alignmask(aead);
 	align &= ~(crypto_tfm_ctx_alignment() - 1);
-	crypto_aead_set_reqsize(__crypto_aead_cast(tfm),
+	crypto_aead_set_reqsize(
+		tfm,
 		sizeof(struct aead_request) +
 		ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) +
-		align + 16);
+		align + 12);
 
 	return 0;
 }
 
-static void crypto_rfc4106_exit_tfm(struct crypto_tfm *tfm)
+static void crypto_rfc4106_exit_tfm(struct crypto_aead *tfm)
 {
-	struct crypto_rfc4106_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(tfm);
 
 	crypto_free_aead(ctx->child);
 }
 
-static struct crypto_instance *crypto_rfc4106_alloc(struct rtattr **tb)
+static int crypto_rfc4106_create(struct crypto_template *tmpl,
+				 struct rtattr **tb)
 {
 	struct crypto_attr_type *algt;
-	struct crypto_instance *inst;
+	struct aead_instance *inst;
 	struct crypto_aead_spawn *spawn;
-	struct crypto_alg *alg;
+	struct aead_alg *alg;
 	const char *ccm_name;
 	int err;
 
 	algt = crypto_get_attr_type(tb);
 	if (IS_ERR(algt))
-		return ERR_CAST(algt);
+		return PTR_ERR(algt);
 
 	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 
 	ccm_name = crypto_attr_alg_name(tb[1]);
 	if (IS_ERR(ccm_name))
-		return ERR_CAST(ccm_name);
+		return PTR_ERR(ccm_name);
 
 	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
 	if (!inst)
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 
-	spawn = crypto_instance_ctx(inst);
-	crypto_set_aead_spawn(spawn, inst);
+	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));
 	if (err)
 		goto out_free_inst;
 
-	alg = crypto_aead_spawn_alg(spawn);
+	alg = crypto_spawn_aead_alg(spawn);
 
 	err = -EINVAL;
 
-	/* We only support 16-byte blocks. */
-	if (alg->cra_aead.ivsize != 16)
+	/* Underlying IV size must be 12. */
+	if (crypto_aead_alg_ivsize(alg) != 12)
 		goto out_drop_alg;
 
 	/* Not a stream cipher? */
-	if (alg->cra_blocksize != 1)
+	if (alg->base.cra_blocksize != 1)
 		goto out_drop_alg;
 
 	err = -ENAMETOOLONG;
-	if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
-		     "rfc4106(%s)", alg->cra_name) >= CRYPTO_MAX_ALG_NAME ||
-	    snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
-		     "rfc4106(%s)", alg->cra_driver_name) >=
+	if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
+		     "rfc4106(%s)", alg->base.cra_name) >=
+	    CRYPTO_MAX_ALG_NAME ||
+	    snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+		     "rfc4106(%s)", alg->base.cra_driver_name) >=
 	    CRYPTO_MAX_ALG_NAME)
 		goto out_drop_alg;
 
-	inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
-	inst->alg.cra_flags |= alg->cra_flags & CRYPTO_ALG_ASYNC;
-	inst->alg.cra_priority = alg->cra_priority;
-	inst->alg.cra_blocksize = 1;
-	inst->alg.cra_alignmask = alg->cra_alignmask;
-	inst->alg.cra_type = &crypto_nivaead_type;
+	inst->alg.base.cra_flags |= alg->base.cra_flags & CRYPTO_ALG_ASYNC;
+	inst->alg.base.cra_priority = alg->base.cra_priority;
+	inst->alg.base.cra_blocksize = 1;
+	inst->alg.base.cra_alignmask = alg->base.cra_alignmask;
 
-	inst->alg.cra_aead.ivsize = 8;
-	inst->alg.cra_aead.maxauthsize = 16;
+	inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4106_ctx);
 
-	inst->alg.cra_ctxsize = sizeof(struct crypto_rfc4106_ctx);
+	inst->alg.ivsize = 8;
+	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
 
-	inst->alg.cra_init = crypto_rfc4106_init_tfm;
-	inst->alg.cra_exit = crypto_rfc4106_exit_tfm;
+	inst->alg.init = crypto_rfc4106_init_tfm;
+	inst->alg.exit = crypto_rfc4106_exit_tfm;
 
-	inst->alg.cra_aead.setkey = crypto_rfc4106_setkey;
-	inst->alg.cra_aead.setauthsize = crypto_rfc4106_setauthsize;
-	inst->alg.cra_aead.encrypt = crypto_rfc4106_encrypt;
-	inst->alg.cra_aead.decrypt = crypto_rfc4106_decrypt;
+	inst->alg.setkey = crypto_rfc4106_setkey;
+	inst->alg.setauthsize = crypto_rfc4106_setauthsize;
+	inst->alg.encrypt = crypto_rfc4106_encrypt;
+	inst->alg.decrypt = crypto_rfc4106_decrypt;
 
-	inst->alg.cra_aead.geniv = "seqiv";
+	err = aead_register_instance(tmpl, inst);
+	if (err)
+		goto out_drop_alg;
 
 out:
-	return inst;
+	return err;
 
 out_drop_alg:
 	crypto_drop_aead(spawn);
 out_free_inst:
 	kfree(inst);
-	inst = ERR_PTR(err);
 	goto out;
 }
 
 static void crypto_rfc4106_free(struct crypto_instance *inst)
 {
-	crypto_drop_spawn(crypto_instance_ctx(inst));
-	kfree(inst);
+	crypto_drop_aead(crypto_instance_ctx(inst));
+	kfree(aead_instance(inst));
 }
 
 static struct crypto_template crypto_rfc4106_tmpl = {
 	.name = "rfc4106",
-	.alloc = crypto_rfc4106_alloc,
+	.create = crypto_rfc4106_create,
 	.free = crypto_rfc4106_free,
 	.module = THIS_MODULE,
 };
 
-static inline struct crypto_rfc4543_req_ctx *crypto_rfc4543_reqctx(
-	struct aead_request *req)
-{
-	unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req));
-
-	return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1);
-}
-
 static int crypto_rfc4543_setkey(struct crypto_aead *parent, const u8 *key,
 				 unsigned int keylen)
 {
@@ -1100,83 +1013,35 @@ static int crypto_rfc4543_setauthsize(struct crypto_aead *parent,
 	return crypto_aead_setauthsize(ctx->child, authsize);
 }
 
-static void crypto_rfc4543_done(struct crypto_async_request *areq, int err)
-{
-	struct aead_request *req = areq->data;
-	struct crypto_aead *aead = crypto_aead_reqtfm(req);
-	struct crypto_rfc4543_req_ctx *rctx = crypto_rfc4543_reqctx(req);
-
-	if (!err) {
-		scatterwalk_map_and_copy(rctx->auth_tag, req->dst,
-					 req->cryptlen,
-					 crypto_aead_authsize(aead), 1);
-	}
-
-	aead_request_complete(req, err);
-}
-
-static struct aead_request *crypto_rfc4543_crypt(struct aead_request *req,
-						 bool enc)
+static int crypto_rfc4543_crypt(struct aead_request *req, bool enc)
 {
 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
 	struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(aead);
-	struct crypto_rfc4543_req_ctx *rctx = crypto_rfc4543_reqctx(req);
+	struct crypto_rfc4543_req_ctx *rctx = aead_request_ctx(req);
 	struct aead_request *subreq = &rctx->subreq;
-	struct scatterlist *src = req->src;
-	struct scatterlist *cipher = rctx->cipher;
-	struct scatterlist *payload = rctx->payload;
-	struct scatterlist *assoc = rctx->assoc;
 	unsigned int authsize = crypto_aead_authsize(aead);
-	unsigned int assoclen = req->assoclen;
-	struct page *srcp;
-	u8 *vsrc;
 	u8 *iv = PTR_ALIGN((u8 *)(rctx + 1) + crypto_aead_reqsize(ctx->child),
 			   crypto_aead_alignmask(ctx->child) + 1);
+	int err;
+
+	if (req->src != req->dst) {
+		err = crypto_rfc4543_copy_src_to_dst(req, enc);
+		if (err)
+			return err;
+	}
 
 	memcpy(iv, ctx->nonce, 4);
 	memcpy(iv + 4, req->iv, 8);
 
-	/* construct cipher/plaintext */
-	if (enc)
-		memset(rctx->auth_tag, 0, authsize);
-	else
-		scatterwalk_map_and_copy(rctx->auth_tag, src,
-					 req->cryptlen - authsize,
-					 authsize, 0);
-
-	sg_init_one(cipher, rctx->auth_tag, authsize);
-
-	/* construct the aad */
-	srcp = sg_page(src);
-	vsrc = PageHighMem(srcp) ? NULL : page_address(srcp) + src->offset;
-
-	sg_init_table(payload, 2);
-	sg_set_buf(payload, req->iv, 8);
-	scatterwalk_crypto_chain(payload, src, vsrc == req->iv + 8, 2);
-	assoclen += 8 + req->cryptlen - (enc ? 0 : authsize);
-
-	if (req->assoc->length == req->assoclen) {
-		sg_init_table(assoc, 2);
-		sg_set_page(assoc, sg_page(req->assoc), req->assoc->length,
-			    req->assoc->offset);
-	} else {
-		BUG_ON(req->assoclen > sizeof(rctx->assocbuf));
-
-		scatterwalk_map_and_copy(rctx->assocbuf, req->assoc, 0,
-					 req->assoclen, 0);
-
-		sg_init_table(assoc, 2);
-		sg_set_buf(assoc, rctx->assocbuf, req->assoclen);
-	}
-	scatterwalk_crypto_chain(assoc, payload, 0, 2);
-
 	aead_request_set_tfm(subreq, ctx->child);
-	aead_request_set_callback(subreq, req->base.flags, crypto_rfc4543_done,
-				  req);
-	aead_request_set_crypt(subreq, cipher, cipher, enc ? 0 : authsize, iv);
-	aead_request_set_assoc(subreq, assoc, assoclen);
-
-	return subreq;
+	aead_request_set_callback(subreq, req->base.flags,
+				  req->base.complete, req->base.data);
+	aead_request_set_crypt(subreq, req->src, req->dst,
+			       enc ? 0 : authsize, iv);
+	aead_request_set_ad(subreq, req->assoclen + req->cryptlen -
+				    subreq->cryptlen);
+
+	return enc ? crypto_aead_encrypt(subreq) : crypto_aead_decrypt(subreq);
 }
 
 static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc)
@@ -1184,7 +1049,8 @@ static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc)
 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
 	struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(aead);
 	unsigned int authsize = crypto_aead_authsize(aead);
-	unsigned int nbytes = req->cryptlen - (enc ? 0 : authsize);
+	unsigned int nbytes = req->assoclen + req->cryptlen -
+			      (enc ? 0 : authsize);
 	struct blkcipher_desc desc = {
 		.tfm = ctx->null,
 	};
@@ -1194,49 +1060,20 @@ static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc)
 
 static int crypto_rfc4543_encrypt(struct aead_request *req)
 {
-	struct crypto_aead *aead = crypto_aead_reqtfm(req);
-	struct crypto_rfc4543_req_ctx *rctx = crypto_rfc4543_reqctx(req);
-	struct aead_request *subreq;
-	int err;
-
-	if (req->src != req->dst) {
-		err = crypto_rfc4543_copy_src_to_dst(req, true);
-		if (err)
-			return err;
-	}
-
-	subreq = crypto_rfc4543_crypt(req, true);
-	err = crypto_aead_encrypt(subreq);
-	if (err)
-		return err;
-
-	scatterwalk_map_and_copy(rctx->auth_tag, req->dst, req->cryptlen,
-				 crypto_aead_authsize(aead), 1);
-
-	return 0;
+	return crypto_rfc4543_crypt(req, true);
 }
 
 static int crypto_rfc4543_decrypt(struct aead_request *req)
 {
-	int err;
-
-	if (req->src != req->dst) {
-		err = crypto_rfc4543_copy_src_to_dst(req, false);
-		if (err)
-			return err;
-	}
-
-	req = crypto_rfc4543_crypt(req, false);
-
-	return crypto_aead_decrypt(req);
+	return crypto_rfc4543_crypt(req, false);
 }
 
-static int crypto_rfc4543_init_tfm(struct crypto_tfm *tfm)
+static int crypto_rfc4543_init_tfm(struct crypto_aead *tfm)
 {
-	struct crypto_instance *inst = (void *)tfm->__crt_alg;
-	struct crypto_rfc4543_instance_ctx *ictx = crypto_instance_ctx(inst);
+	struct aead_instance *inst = aead_alg_instance(tfm);
+	struct crypto_rfc4543_instance_ctx *ictx = aead_instance_ctx(inst);
 	struct crypto_aead_spawn *spawn = &ictx->aead;
-	struct crypto_rfc4543_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(tfm);
 	struct crypto_aead *aead;
 	struct crypto_blkcipher *null;
 	unsigned long align;
@@ -1256,10 +1093,11 @@ static int crypto_rfc4543_init_tfm(struct crypto_tfm *tfm)
 
 	align = crypto_aead_alignmask(aead);
 	align &= ~(crypto_tfm_ctx_alignment() - 1);
-	crypto_aead_set_reqsize(__crypto_aead_cast(tfm),
+	crypto_aead_set_reqsize(
+		tfm,
 		sizeof(struct crypto_rfc4543_req_ctx) +
 		ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) +
-		align + 16);
+		align + 12);
 
 	return 0;
 
@@ -1268,97 +1106,98 @@ err_free_aead:
 	return err;
 }
 
-static void crypto_rfc4543_exit_tfm(struct crypto_tfm *tfm)
+static void crypto_rfc4543_exit_tfm(struct crypto_aead *tfm)
 {
-	struct crypto_rfc4543_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(tfm);
 
 	crypto_free_aead(ctx->child);
 	crypto_put_default_null_skcipher();
 }
 
-static struct crypto_instance *crypto_rfc4543_alloc(struct rtattr **tb)
+static int crypto_rfc4543_create(struct crypto_template *tmpl,
+				struct rtattr **tb)
 {
 	struct crypto_attr_type *algt;
-	struct crypto_instance *inst;
+	struct aead_instance *inst;
 	struct crypto_aead_spawn *spawn;
-	struct crypto_alg *alg;
+	struct aead_alg *alg;
 	struct crypto_rfc4543_instance_ctx *ctx;
 	const char *ccm_name;
 	int err;
 
 	algt = crypto_get_attr_type(tb);
 	if (IS_ERR(algt))
-		return ERR_CAST(algt);
+		return PTR_ERR(algt);
 
 	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 
 	ccm_name = crypto_attr_alg_name(tb[1]);
 	if (IS_ERR(ccm_name))
-		return ERR_CAST(ccm_name);
+		return PTR_ERR(ccm_name);
 
 	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
 	if (!inst)
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 
-	ctx = crypto_instance_ctx(inst);
+	ctx = aead_instance_ctx(inst);
 	spawn = &ctx->aead;
-	crypto_set_aead_spawn(spawn, 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));
 	if (err)
 		goto out_free_inst;
 
-	alg = crypto_aead_spawn_alg(spawn);
+	alg = crypto_spawn_aead_alg(spawn);
 
 	err = -EINVAL;
 
-	/* We only support 16-byte blocks. */
-	if (alg->cra_aead.ivsize != 16)
+	/* Underlying IV size must be 12. */
+	if (crypto_aead_alg_ivsize(alg) != 12)
 		goto out_drop_alg;
 
 	/* Not a stream cipher? */
-	if (alg->cra_blocksize != 1)
+	if (alg->base.cra_blocksize != 1)
 		goto out_drop_alg;
 
 	err = -ENAMETOOLONG;
-	if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
-		     "rfc4543(%s)", alg->cra_name) >= CRYPTO_MAX_ALG_NAME ||
-	    snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
-		     "rfc4543(%s)", alg->cra_driver_name) >=
+	if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
+		     "rfc4543(%s)", alg->base.cra_name) >=
+	    CRYPTO_MAX_ALG_NAME ||
+	    snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+		     "rfc4543(%s)", alg->base.cra_driver_name) >=
 	    CRYPTO_MAX_ALG_NAME)
 		goto out_drop_alg;
 
-	inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
-	inst->alg.cra_flags |= alg->cra_flags & CRYPTO_ALG_ASYNC;
-	inst->alg.cra_priority = alg->cra_priority;
-	inst->alg.cra_blocksize = 1;
-	inst->alg.cra_alignmask = alg->cra_alignmask;
-	inst->alg.cra_type = &crypto_nivaead_type;
+	inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC;
+	inst->alg.base.cra_priority = alg->base.cra_priority;
+	inst->alg.base.cra_blocksize = 1;
+	inst->alg.base.cra_alignmask = alg->base.cra_alignmask;
 
-	inst->alg.cra_aead.ivsize = 8;
-	inst->alg.cra_aead.maxauthsize = 16;
+	inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4543_ctx);
 
-	inst->alg.cra_ctxsize = sizeof(struct crypto_rfc4543_ctx);
+	inst->alg.ivsize = 8;
+	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
 
-	inst->alg.cra_init = crypto_rfc4543_init_tfm;
-	inst->alg.cra_exit = crypto_rfc4543_exit_tfm;
+	inst->alg.init = crypto_rfc4543_init_tfm;
+	inst->alg.exit = crypto_rfc4543_exit_tfm;
 
-	inst->alg.cra_aead.setkey = crypto_rfc4543_setkey;
-	inst->alg.cra_aead.setauthsize = crypto_rfc4543_setauthsize;
-	inst->alg.cra_aead.encrypt = crypto_rfc4543_encrypt;
-	inst->alg.cra_aead.decrypt = crypto_rfc4543_decrypt;
+	inst->alg.setkey = crypto_rfc4543_setkey;
+	inst->alg.setauthsize = crypto_rfc4543_setauthsize;
+	inst->alg.encrypt = crypto_rfc4543_encrypt;
+	inst->alg.decrypt = crypto_rfc4543_decrypt;
 
-	inst->alg.cra_aead.geniv = "seqiv";
+	err = aead_register_instance(tmpl, inst);
+	if (err)
+		goto out_drop_alg;
 
 out:
-	return inst;
+	return err;
 
 out_drop_alg:
 	crypto_drop_aead(spawn);
 out_free_inst:
 	kfree(inst);
-	inst = ERR_PTR(err);
 	goto out;
 }
 
@@ -1368,12 +1207,12 @@ static void crypto_rfc4543_free(struct crypto_instance *inst)
 
 	crypto_drop_aead(&ctx->aead);
 
-	kfree(inst);
+	kfree(aead_instance(inst));
 }
 
 static struct crypto_template crypto_rfc4543_tmpl = {
 	.name = "rfc4543",
-	.alloc = crypto_rfc4543_alloc,
+	.create = crypto_rfc4543_create,
 	.free = crypto_rfc4543_free,
 	.module = THIS_MODULE,
 };
@@ -1382,10 +1221,12 @@ static int __init crypto_gcm_module_init(void)
 {
 	int err;
 
-	gcm_zeroes = kzalloc(16, GFP_KERNEL);
+	gcm_zeroes = kzalloc(sizeof(*gcm_zeroes), GFP_KERNEL);
 	if (!gcm_zeroes)
 		return -ENOMEM;
 
+	sg_init_one(&gcm_zeroes->sg, gcm_zeroes->buf, sizeof(gcm_zeroes->buf));
+
 	err = crypto_register_template(&crypto_gcm_base_tmpl);
 	if (err)
 		goto out;