3 files changed, 18 insertions, 10 deletions

diff --git a/crypto/authenc.c b/crypto/authenc.c
index 40b6e9ec9e3a..5793b64c81a8 100644
--- a/crypto/authenc.c
+++ b/crypto/authenc.c
@@ -158,16 +158,19 @@ static int crypto_authenc_genicv(struct aead_request *req, u8 *iv,
         dstp = sg_page(dst);
         vdst = PageHighMem(dstp) ? NULL : page_address(dstp) + dst->offset;
 
-        sg_init_table(cipher, 2);
-        sg_set_buf(cipher, iv, ivsize);
-        authenc_chain(cipher, dst, vdst == iv + ivsize);
+        if (ivsize) {
+                sg_init_table(cipher, 2);
+                sg_set_buf(cipher, iv, ivsize);
+                authenc_chain(cipher, dst, vdst == iv + ivsize);
+                dst = cipher;
+        }
 
         cryptlen = req->cryptlen + ivsize;
-        hash = crypto_authenc_hash(req, flags, cipher, cryptlen);
+        hash = crypto_authenc_hash(req, flags, dst, cryptlen);
         if (IS_ERR(hash))
                 return PTR_ERR(hash);
 
-        scatterwalk_map_and_copy(hash, cipher, cryptlen,
+        scatterwalk_map_and_copy(hash, dst, cryptlen,
                                  crypto_aead_authsize(authenc), 1);
         return 0;
 }
@@ -285,11 +288,14 @@ static int crypto_authenc_iverify(struct aead_request *req, u8 *iv,
         srcp = sg_page(src);
         vsrc = PageHighMem(srcp) ? NULL : page_address(srcp) + src->offset;
 
-        sg_init_table(cipher, 2);
-        sg_set_buf(cipher, iv, ivsize);
-        authenc_chain(cipher, src, vsrc == iv + ivsize);
+        if (ivsize) {
+                sg_init_table(cipher, 2);
+                sg_set_buf(cipher, iv, ivsize);
+                authenc_chain(cipher, src, vsrc == iv + ivsize);
+                src = cipher;
+        }
 
-        return crypto_authenc_verify(req, cipher, cryptlen + ivsize);
+        return crypto_authenc_verify(req, src, cryptlen + ivsize);
 }
 
 static int crypto_authenc_decrypt(struct aead_request *req)
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index 4a7e65c4df4d..d70a41c002df 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -124,6 +124,7 @@ int blkcipher_walk_done(struct blkcipher_desc *desc,
         scatterwalk_done(&walk->in, 0, nbytes);
         scatterwalk_done(&walk->out, 1, nbytes);
 
+err:
         walk->total = nbytes;
         walk->nbytes = nbytes;
 
@@ -132,7 +133,6 @@ int blkcipher_walk_done(struct blkcipher_desc *desc,
                 return blkcipher_walk_next(desc, walk);
         }
 
-err:
         if (walk->iv != desc->info)
                 memcpy(desc->info, walk->iv, crypto_blkcipher_ivsize(tfm));
         if (walk->buffer != walk->page)
diff --git a/crypto/ccm.c b/crypto/ccm.c
index 7cf7e5a6b781..c36d654cf56a 100644
--- a/crypto/ccm.c
+++ b/crypto/ccm.c
@@ -266,6 +266,8 @@ static int crypto_ccm_auth(struct aead_request *req, struct scatterlist *plain,
         if (assoclen) {
                 pctx->ilen = format_adata(idata, assoclen);
                 get_data_to_compute(cipher, pctx, req->assoc, req->assoclen);
+        } else {
+                pctx->ilen = 0;
         }
 
         /* compute plaintext into mac */