[PATCH 09/15] fscrypt: drop empty name check from fname_decrypt()

[Eric Biggers]

From: Eric Biggers <ebiggers at google.com>

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 at google.com>
---
 fs/crypto/fname.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c
index cc9590b5f371..c4eb3a235ae4 100644
--- a/fs/crypto/fname.c
+++ b/fs/crypto/fname.c
@@ -97,9 +97,6 @@ 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)
-- 
2.17.0.441.gb46fe60e1d-goog