From 219e65410cae6cad0d61a059d0128005002875cf Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Mon, 30 Apr 2018 15:51:42 -0700 Subject: [PATCH] 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: Eric Biggers Signed-off-by: Theodore Ts'o --- fs/crypto/fname.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c index 8088a606c0aa..cc9590b5f371 100644 --- a/fs/crypto/fname.c +++ b/fs/crypto/fname.c @@ -93,14 +93,11 @@ static int fname_decrypt(struct inode *inode, struct skcipher_request *req = NULL; DECLARE_CRYPTO_WAIT(wait); struct scatterlist src_sg, dst_sg; - struct fscrypt_info *ci = inode->i_crypt_info; - struct crypto_skcipher *tfm = ci->ci_ctfm; + struct crypto_skcipher *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 */ -- 2.20.1