From: Xiubo Li <xiubli@xxxxxxxxxx> The fname->name is based64_encoded names and the max long shouldn't exceed the NAME_MAX. The FSCRYPT_BASE64URL_CHARS(NAME_MAX) will be 255 * 4 / 3. [ xiubli: s/FSCRYPT_BASE64URL_CHARS/CEPH_BASE64_CHARS/ reported by kernel test robot <lkp@xxxxxxxxx> ] Tested-by: Luís Henriques <lhenriques@xxxxxxx> Tested-by: Venky Shankar <vshankar@xxxxxxxxxx> Reviewed-by: Luís Henriques <lhenriques@xxxxxxx> Signed-off-by: Xiubo Li <xiubli@xxxxxxxxxx> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx> --- fs/ceph/crypto.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ceph/crypto.c b/fs/ceph/crypto.c index 03f4b9e73884..2222f4968f74 100644 --- a/fs/ceph/crypto.c +++ b/fs/ceph/crypto.c @@ -264,7 +264,7 @@ int ceph_fname_to_usr(const struct ceph_fname *fname, struct fscrypt_str *tname, } /* Sanity check that the resulting name will fit in the buffer */ - if (fname->name_len > CEPH_BASE64_CHARS(NAME_MAX)) + if (fname->name_len > NAME_MAX || fname->ctext_len > NAME_MAX) return -EIO; ret = __fscrypt_prepare_readdir(fname->dir); -- 2.39.1
