Merge tag 'ecryptfs-7.2-rc1-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs

Pull ecryptfs updates from Tyler Hicks:
 "No functional changes, just code cleanups:

   - replace kmalloc()/snprintf() with kasprintf()

   - simplify code flow by removing an unnecessary variable"

* tag 'ecryptfs-7.2-rc1-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs:
  ecryptfs: use kasprintf in ecryptfs_crypto_api_algify_cipher_name
  ecryptfs: remove redundant variable found_auth_tok

2 files changed, 12 insertions, 28 deletions

diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 5ef67b2674ee..74b02b55e3f6 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -49,25 +49,15 @@ void ecryptfs_from_hex(char *dst, char *src, int dst_size)
 }
 
 static int ecryptfs_crypto_api_algify_cipher_name(char **algified_name,
-						  char *cipher_name,
-						  char *chaining_modifier)
+						  const char *cipher_name,
+						  const char *chaining_modifier)
 {
-	int cipher_name_len = strlen(cipher_name);
-	int chaining_modifier_len = strlen(chaining_modifier);
-	int algified_name_len;
-	int rc;
+	(*algified_name) = kasprintf(GFP_KERNEL, "%s(%s)", chaining_modifier,
+				     cipher_name);
+	if (!(*algified_name))
+		return -ENOMEM;
 
-	algified_name_len = (chaining_modifier_len + cipher_name_len + 3);
-	(*algified_name) = kmalloc(algified_name_len, GFP_KERNEL);
-	if (!(*algified_name)) {
-		rc = -ENOMEM;
-		goto out;
-	}
-	snprintf((*algified_name), algified_name_len, "%s(%s)",
-		 chaining_modifier, cipher_name);
-	rc = 0;
-out:
-	return rc;
+	return 0;
 }
 
 /**
diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index 0be746493e56..ebebc9551f1f 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -1718,7 +1718,6 @@ int ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
 			      struct dentry *ecryptfs_dentry)
 {
 	size_t i = 0;
-	size_t found_auth_tok;
 	size_t next_packet_is_auth_tok_packet;
 	LIST_HEAD(auth_tok_list);
 	struct ecryptfs_auth_tok *matching_auth_tok;
@@ -1822,7 +1821,6 @@ int ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
 	 * the metadata. There may be several potential matches, but
 	 * just one will be sufficient to decrypt to get the FEK. */
 find_next_matching_auth_tok:
-	found_auth_tok = 0;
 	list_for_each_entry(auth_tok_list_item, &auth_tok_list, list) {
 		candidate_auth_tok = &auth_tok_list_item->auth_tok;
 		if (unlikely(ecryptfs_verbosity > 0)) {
@@ -1843,17 +1841,13 @@ find_next_matching_auth_tok:
 					       &matching_auth_tok,
 					       crypt_stat->mount_crypt_stat,
 					       candidate_auth_tok_sig);
-		if (!rc) {
-			found_auth_tok = 1;
+		if (!rc)
 			goto found_matching_auth_tok;
-		}
-	}
-	if (!found_auth_tok) {
-		ecryptfs_printk(KERN_ERR, "Could not find a usable "
-				"authentication token\n");
-		rc = -EIO;
-		goto out_wipe_list;
 	}
+	ecryptfs_printk(KERN_ERR,
+			"Could not find a usable authentication token\n");
+	rc = -EIO;
+	goto out_wipe_list;
 found_matching_auth_tok:
 	if (candidate_auth_tok->token_type == ECRYPTFS_PRIVATE_KEY) {
 		memcpy(&(candidate_auth_tok->token.private_key),