1 files changed, 11 insertions, 7 deletions

diff --git a/crypto/gcm.c b/crypto/gcm.c
index 502da92..73565d6 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -40,6 +40,7 @@ struct crypto_gcm_req_priv_ctx {
 	u8 iauth_tag[16];
 	u8 counter[16];
 	struct crypto_gcm_ghash_ctx ghash;
+	struct ablkcipher_request abreq;
 };
 
 static void crypto_gcm_ghash_init(struct crypto_gcm_ghash_ctx *ctx, u32 flags,
@@ -280,16 +281,17 @@ static void crypto_gcm_encrypt_done(struct crypto_async_request *areq, int err)
 
 static int crypto_gcm_encrypt(struct aead_request *req)
 {
-	struct ablkcipher_request abreq;
+	struct crypto_gcm_req_priv_ctx *pctx = aead_request_ctx(req);
+	struct ablkcipher_request *abreq = &pctx->abreq;
 	int err = 0;
 
-	err = crypto_gcm_init_crypt(&abreq, req, req->cryptlen,
+	err = crypto_gcm_init_crypt(abreq, req, req->cryptlen,
 				    crypto_gcm_encrypt_done);
 	if (err)
 		return err;
 
 	if (req->cryptlen) {
-		err = crypto_ablkcipher_encrypt(&abreq);
+		err = crypto_ablkcipher_encrypt(abreq);
 		if (err)
 			return err;
 	}
@@ -304,9 +306,9 @@ static void crypto_gcm_decrypt_done(struct crypto_async_request *areq, int err)
 
 static int crypto_gcm_decrypt(struct aead_request *req)
 {
-	struct ablkcipher_request abreq;
 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
 	struct crypto_gcm_req_priv_ctx *pctx = aead_request_ctx(req);
+	struct ablkcipher_request *abreq = &pctx->abreq;
 	u8 *auth_tag = pctx->auth_tag;
 	u8 *iauth_tag = pctx->iauth_tag;
 	struct crypto_gcm_ghash_ctx *ghash = &pctx->ghash;
@@ -318,7 +320,7 @@ static int crypto_gcm_decrypt(struct aead_request *req)
 		return -EINVAL;
 	cryptlen -= authsize;
 
-	err = crypto_gcm_init_crypt(&abreq, req, cryptlen,
+	err = crypto_gcm_init_crypt(abreq, req, cryptlen,
 				    crypto_gcm_decrypt_done);
 	if (err)
 		return err;
@@ -330,7 +332,7 @@ static int crypto_gcm_decrypt(struct aead_request *req)
 	if (memcmp(iauth_tag, auth_tag, authsize))
 		return -EBADMSG;
 
-	return crypto_ablkcipher_decrypt(&abreq);
+	return crypto_ablkcipher_decrypt(abreq);
 }
 
 static int crypto_gcm_init_tfm(struct crypto_tfm *tfm)
@@ -353,7 +355,9 @@ static int crypto_gcm_init_tfm(struct crypto_tfm *tfm)
 	align = max_t(unsigned long, crypto_ablkcipher_alignmask(ctr),
 		      __alignof__(u32) - 1);
 	align &= ~(crypto_tfm_ctx_alignment() - 1);
-	tfm->crt_aead.reqsize = align + sizeof(struct crypto_gcm_req_priv_ctx);
+	tfm->crt_aead.reqsize = align +
+				sizeof(struct crypto_gcm_req_priv_ctx) +
+				crypto_ablkcipher_reqsize(ctr);
 
 	return 0;
 }