linux-ext4 - [PATCH] fscrypto: make fname_encrypt() actually return length of ciphertext

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Message-Id: <1473886634-24627-2-git-send-email-ebiggers@google.com>
Date:   Wed, 14 Sep 2016 13:57:13 -0700
From:   Eric Biggers <ebiggers@...gle.com>
To:     linux-fsdevel@...r.kernel.org
Cc:     linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        tytso@....edu, jaegeuk@...nel.org,
        Eric Biggers <ebiggers@...gle.com>
Subject: [PATCH] fscrypto: make fname_encrypt() actually return length of ciphertext

This makes the return value match the comment.  Previously it would
actually return 0 if encryption was successful.  No callers currently
care, but this change should reduce the chance of future bugs.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 fs/crypto/fname.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c
index 3108806..7f3239c 100644
--- a/fs/crypto/fname.c
+++ b/fs/crypto/fname.c
@@ -103,12 +103,13 @@ static int fname_encrypt(struct inode *inode,
 	}
 	kfree(alloc_buf);
 	skcipher_request_free(req);
-	if (res < 0)
+	if (res < 0) {
 		printk_ratelimited(KERN_ERR
 				"%s: Error (error code %d)\n", __func__, res);
-
+		return res;
+	}
 	oname->len = ciphertext_len;
-	return res;
+	return ciphertext_len;
 }
 
 /*
-- 
2.8.0.rc3.226.g39d4020

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