fscrypt: drop empty name check from fname_decrypt()

fname_decrypt() is validating that the encrypted filename is nonempty.
However, earlier a stronger precondition was already enforced: the
encrypted filename must be at least 16 (FS_CRYPTO_BLOCK_SIZE) bytes.

Drop the redundant check for an empty filename.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c
index d21a532..6c4c84e 100644 (file)
--- a/fs/crypto/fname.c
+++ b/fs/crypto/fname.c
@@ -96,9 +96,6 @@ static int fname_decrypt(struct inode *inode,
        int res = 0;
        char iv[FS_CRYPTO_BLOCK_SIZE];
 
-       if (iname->len <= 0)
-               return -EIO;
-
        /* Allocate request */
        req = skcipher_request_alloc(tfm, GFP_NOFS);
        if (!req)