diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 2e87251cacd2b3b5c31278a346e83fd1a4b6d12f..45b64637aa9bc16081f8095f46869644cfd856a4 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -3178,6 +3178,8 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv return -EBUSY; if (copy_from_user(&val, optval, sizeof(val))) return -EFAULT; + if (val > INT_MAX) + return -EINVAL; po->tp_reserve = val; return 0; } @@ -3675,6 +3677,8 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, rb->frames_per_block = req->tp_block_size/req->tp_frame_size; if (unlikely(rb->frames_per_block <= 0)) goto out; + if (unlikely(req->tp_block_size > UINT_MAX / req->tp_block_nr)) + goto out; if (unlikely((rb->frames_per_block * req->tp_block_nr) != req->tp_frame_nr)) goto out;