1 files changed, 21 insertions, 25 deletions

diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index 03e609c45012..27a7fefb83eb 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -599,8 +599,8 @@ struct ecryptfs_write_tag_70_packet_silly_stack {
         struct mutex *tfm_mutex;
         char *block_aligned_filename;
         struct ecryptfs_auth_tok *auth_tok;
-        struct scatterlist src_sg;
-        struct scatterlist dst_sg;
+        struct scatterlist src_sg[2];
+        struct scatterlist dst_sg[2];
         struct blkcipher_desc desc;
         char iv[ECRYPTFS_MAX_IV_BYTES];
         char hash[ECRYPTFS_TAG_70_DIGEST_SIZE];
@@ -816,23 +816,21 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
         memcpy(&s->block_aligned_filename[s->num_rand_bytes], filename,
                filename_size);
         rc = virt_to_scatterlist(s->block_aligned_filename,
-                                 s->block_aligned_filename_size, &s->src_sg, 1);
-        if (rc != 1) {
+                                 s->block_aligned_filename_size, s->src_sg, 2);
+        if (rc < 1) {
                 printk(KERN_ERR "%s: Internal error whilst attempting to "
-                       "convert filename memory to scatterlist; "
-                       "expected rc = 1; got rc = [%d]. "
+                       "convert filename memory to scatterlist; rc = [%d]. "
                        "block_aligned_filename_size = [%zd]\n", __func__, rc,
                        s->block_aligned_filename_size);
                 goto out_release_free_unlock;
         }
         rc = virt_to_scatterlist(&dest[s->i], s->block_aligned_filename_size,
-                                 &s->dst_sg, 1);
-        if (rc != 1) {
+                                 s->dst_sg, 2);
+        if (rc < 1) {
                 printk(KERN_ERR "%s: Internal error whilst attempting to "
                        "convert encrypted filename memory to scatterlist; "
-                       "expected rc = 1; got rc = [%d]. "
-                       "block_aligned_filename_size = [%zd]\n", __func__, rc,
-                       s->block_aligned_filename_size);
+                       "rc = [%d]. block_aligned_filename_size = [%zd]\n",
+                       __func__, rc, s->block_aligned_filename_size);
                 goto out_release_free_unlock;
         }
         /* The characters in the first block effectively do the job
@@ -855,7 +853,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
                        mount_crypt_stat->global_default_fn_cipher_key_bytes);
                 goto out_release_free_unlock;
         }
-        rc = crypto_blkcipher_encrypt_iv(&s->desc, &s->dst_sg, &s->src_sg,
+        rc = crypto_blkcipher_encrypt_iv(&s->desc, s->dst_sg, s->src_sg,
                                          s->block_aligned_filename_size);
         if (rc) {
                 printk(KERN_ERR "%s: Error attempting to encrypt filename; "
@@ -891,8 +889,8 @@ struct ecryptfs_parse_tag_70_packet_silly_stack {
         struct mutex *tfm_mutex;
         char *decrypted_filename;
         struct ecryptfs_auth_tok *auth_tok;
-        struct scatterlist src_sg;
-        struct scatterlist dst_sg;
+        struct scatterlist src_sg[2];
+        struct scatterlist dst_sg[2];
         struct blkcipher_desc desc;
         char fnek_sig_hex[ECRYPTFS_SIG_SIZE_HEX + 1];
         char iv[ECRYPTFS_MAX_IV_BYTES];
@@ -1008,13 +1006,12 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
         }
         mutex_lock(s->tfm_mutex);
         rc = virt_to_scatterlist(&data[(*packet_size)],
-                                 s->block_aligned_filename_size, &s->src_sg, 1);
-        if (rc != 1) {
+                                 s->block_aligned_filename_size, s->src_sg, 2);
+        if (rc < 1) {
                 printk(KERN_ERR "%s: Internal error whilst attempting to "
                        "convert encrypted filename memory to scatterlist; "
-                       "expected rc = 1; got rc = [%d]. "
-                       "block_aligned_filename_size = [%zd]\n", __func__, rc,
-                       s->block_aligned_filename_size);
+                       "rc = [%d]. block_aligned_filename_size = [%zd]\n",
+                       __func__, rc, s->block_aligned_filename_size);
                 goto out_unlock;
         }
         (*packet_size) += s->block_aligned_filename_size;
@@ -1028,13 +1025,12 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
                 goto out_unlock;
         }
         rc = virt_to_scatterlist(s->decrypted_filename,
-                                 s->block_aligned_filename_size, &s->dst_sg, 1);
-        if (rc != 1) {
+                                 s->block_aligned_filename_size, s->dst_sg, 2);
+        if (rc < 1) {
                 printk(KERN_ERR "%s: Internal error whilst attempting to "
                        "convert decrypted filename memory to scatterlist; "
-                       "expected rc = 1; got rc = [%d]. "
-                       "block_aligned_filename_size = [%zd]\n", __func__, rc,
-                       s->block_aligned_filename_size);
+                       "rc = [%d]. block_aligned_filename_size = [%zd]\n",
+                       __func__, rc, s->block_aligned_filename_size);
                 goto out_free_unlock;
         }
         /* The characters in the first block effectively do the job of
@@ -1065,7 +1061,7 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
                        mount_crypt_stat->global_default_fn_cipher_key_bytes);
                 goto out_free_unlock;
         }
-        rc = crypto_blkcipher_decrypt_iv(&s->desc, &s->dst_sg, &s->src_sg,
+        rc = crypto_blkcipher_decrypt_iv(&s->desc, s->dst_sg, s->src_sg,
                                          s->block_aligned_filename_size);
         if (rc) {
                 printk(KERN_ERR "%s: Error attempting to decrypt filename; "