diff options
Diffstat (limited to 'fs/crypto/fname.c')
| -rw-r--r-- | fs/crypto/fname.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c index 52d4dbe1e8e7..62f13d533439 100644 --- a/fs/crypto/fname.c +++ b/fs/crypto/fname.c @@ -34,8 +34,8 @@ static inline bool fscrypt_is_dot_dotdot(const struct qstr *str) * * Return: 0 on success, -errno on failure */ -static int fname_encrypt(struct inode *inode, - const struct qstr *iname, struct fscrypt_str *oname) +int fname_encrypt(struct inode *inode, + const struct qstr *iname, struct fscrypt_str *oname) { struct skcipher_request *req = NULL; DECLARE_CRYPTO_WAIT(wait); @@ -56,9 +56,11 @@ static int fname_encrypt(struct inode *inode, * Copy the filename to the output buffer for encrypting in-place and * pad it with the needed number of NUL bytes. */ + if (WARN_ON(oname->len < iname->len)) + return -ENOBUFS; cryptlen = max_t(unsigned int, iname->len, FS_CRYPTO_BLOCK_SIZE); cryptlen = round_up(cryptlen, padding); - cryptlen = min(cryptlen, lim); + cryptlen = min3(cryptlen, lim, oname->len); memcpy(oname->name, iname->name, iname->len); memset(oname->name + iname->len, 0, cryptlen - iname->len); |