static int alg_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
{
- const u32 forbidden = CRYPTO_ALG_INTERNAL;
+ const u32 allowed = CRYPTO_ALG_KERN_DRIVER_ONLY;
struct sock *sk = sock->sk;
struct alg_sock *ask = alg_sk(sk);
struct sockaddr_alg *sa = (void *)uaddr;
if (addr_len < sizeof(*sa))
return -EINVAL;
+ /* If caller uses non-allowed flag, return error. */
+ if ((sa->salg_feat & ~allowed) || (sa->salg_mask & ~allowed))
+ return -EINVAL;
+
sa->salg_type[sizeof(sa->salg_type) - 1] = 0;
sa->salg_name[sizeof(sa->salg_name) + addr_len - sizeof(*sa) - 1] = 0;
if (IS_ERR(type))
return PTR_ERR(type);
- private = type->bind(sa->salg_name,
- sa->salg_feat & ~forbidden,
- sa->salg_mask & ~forbidden);
+ private = type->bind(sa->salg_name, sa->salg_feat, sa->salg_mask);
if (IS_ERR(private)) {
module_put(type->owner);
return PTR_ERR(private);