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xsk: proper queue id check at bind 

Validate the queue id against both Rx and Tx on the netdev. Also, make
sure that the queue exists at xmit time.

Reported-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Magnus Karlsson 2018-05-22 09:34:58 +02:00 committed by Daniel Borkmann
parent ad75646c68
commit 2e59dd5e4f
1 changed files with 7 additions and 1 deletions
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8
net/xdp/xsk.c
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@ -142,6 +142,11 @@ static int xsk_generic_xmit(struct sock *sk, struct msghdr *m,
goto out;
}
if (xs->queue_id >= xs->dev->real_num_tx_queues) {
err = -ENXIO;
goto out;
}
skb = sock_alloc_send_skb(sk, len, !need_wait, &err);
if (unlikely(!skb)) {
err = -EAGAIN;
@ -305,7 +310,8 @@ static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
goto out_unlock;
}
if (sxdp->sxdp_queue_id >= dev->num_rx_queues) {
if ((xs->rx && sxdp->sxdp_queue_id >= dev->real_num_rx_queues) ||
(xs->tx && sxdp->sxdp_queue_id >= dev->real_num_tx_queues)) {
err = -EINVAL;
goto out_unlock;
}