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Commit 27433717 authored by Eric Biggers's avatar Eric Biggers Committed by Jaegeuk Kim
Browse files

fscrypt: drop max_namelen check from fname_decrypt() 



fname_decrypt() returns an error if the input filename is longer than
the inode's ->max_namelen() as given by the filesystem.  But, this
doesn't actually make sense because the filesystem provided the input
filename in the first place, where it was subject to the filesystem's
limits.  And fname_decrypt() has no internal limit itself.

Thus, remove this unnecessary check.

Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 1e60d10b

fs/crypto/fname.c

+2 −5
Original line number Diff line number Diff line
@@ -92,14 +92,11 @@ static int fname_decrypt(struct inode *inode, 
	struct ablkcipher_request *req = NULL;

	DECLARE_CRYPTO_WAIT(wait);

	struct scatterlist src_sg, dst_sg;

	struct fscrypt_info *ci = inode->i_crypt_info;

	struct crypto_ablkcipher *tfm = ci->ci_ctfm;

	struct crypto_ablkcipher *tfm = inode->i_crypt_info->ci_ctfm;

	int res = 0;

	char iv[FS_CRYPTO_BLOCK_SIZE];

	unsigned lim;



	lim = inode->i_sb->s_cop->max_namelen(inode);

	if (iname->len <= 0 || iname->len > lim)

	if (iname->len <= 0)

		return -EIO;



	/* Allocate request */