diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 2323ee35dc0983e2ddea51b21d3a48c78a1cee51..3ac286ebb2f48f0c1de2b9e7a437f5af5b3bdb9d 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -4205,6 +4205,8 @@ 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;